A Guide To Combi Boilers

There are three types of boilers that are typically found in UK households: combi, system and conventional, with each having a specific purpose and different builds. In this article, we will explain what combi boilers are, their benefits and their drawbacks.

What is a combi boiler?

A combination boiler, otherwise known as a combi boiler, is the most common type of boiler found in the UK, with over 50% of the new domestic installations in the UK being combi boilers.

How long do combi boilers last?

Combi boilers last between 10-15 years, depending on the model of the boiler and how well it is maintained. One way to improve it’s lifespan is to have your boiler serviced every year. To find out why it is very beneficial to service your boiler every year, please click here.

What are the benefits of a combi boiler?

Combi boilers are very popular due to how useful they are to many types of households. Benefits of combi boilers include:
-Saving space: combi boilers combine the central heating boiler with the water heater, which reduces the amount of space required. This means combi boilers are more space effective, allowing you to use the extra space as you wish.
-Lower costs: Due to the boilers being combined, they are easier to install, which can lead to lower installation costs than system and conventional boilers.
-Instant water: Combi boilers use the water mains grid to retrieve water to use in your heating system, meaning your showers will be more powerful.
-Efficiency: Combi boilers are considered to be highly efficient, with many combi boilers having an efficiency rating of over 90%.

What are the disadvantages of a combi boiler?

Combi boilers, despite being used in most UK households, do have one major drawback: they are not ideal for larger households. If your household has several bathrooms, or lots of rooms, then a combi boiler will not be powerful enough to supply the entire house. A system or conventional boiler will be more efficient for larger houses due to their use of a water cylinder.

The other main drawback to combi boilers is their usage of the mains. This may be beneficial from a space perspective, however, this can significantly impact the pressure of the water if multiple water appliances are being used at the same time.

If you would like a boiler installation or repair, please contact Bradford Boiler Company at info@bradfordboilercompany.co.uk or 01247 317169.

How To Choose The Right Boiler For Your Home

It is inevitable that your boiler will eventually break or no longer become financially worth running. When choosing a new boiler, you want to make sure that you choose one that works for you and your house’s needs. In this blog, we will explore what to consider when purchasing a new boiler.

Types of boiler

The first factor to consider when buying a new boiler is what type of boiler you have and need. There are three main types of boiler that are commonly found in UK households:
Combi boiler – combi boilers are the most common types of boiler found in the UK. They are perfect for smaller families with a house with only one bathroom, and a smaller water and heating usage.
System boiler – System boilers use water cylinders to store hot water used in the heating system. System boilers also get the water directly from the mains, unlike conventional boilers.
Conventional boiler – Conventional boilers are like system boilers in that they both use cylinders to store hot water. However, conventional boilers do not get their water directly from the mains.

If you would like to learn more about the different types of boilers, please click here.

Needs and house size

The size of your house and how much you will use the heating system will impact which boilers will be best suited for your house. For example, a combi boiler is best suited for smaller families and one bathroom due to receiving water directly through the mains. System boilers are able to handle larger heating and water demands, which is ideal for larger families, or for houses with more than one bathroom.

Boiler size

Boiler size refers to how many kiloWatts (kW) a boiler can produce. Depending on how many radiators your house has, and what type of boiler you have will impact what size boiler you should go for. Please note that you should never get a boiler that is too powerful: it will not make your boiler more efficient, it will instead waste the fuel. We have previously discussed boiler sizes in more detail, to read more about boiler size, please click here.

Combi boilers:
-Up to 10 radiators: 24kW – 27kW
-10 – 15 radiators: 28kW – 34kW
-15 – 20 radiators: 35kW – 42kW

System and Conventional boilers:
-Up to 10 radiators: 12kW – 15kW
-10 – 15 radiators: 18kW – 24kW
-15 – 20 radiators: 30kW – 40kW

In conclusion, there are a variety of factors to consider when purchasing a new boiler, including the type of the boiler, the size of the boiler and your house’s water and heating needs.

If you would like a boiler installing or repairing, please contact Bradford Boiler Company at info@bradfordboilercompany.co.uk or 01247 317169.

Is the landlord or the tenant responsible for the boiler?

It is never ideal when your boiler stops working, especially during the winter season or colder periods. It is even more difficult if you are living in rented accommodation due to not owning the boiler. In this week’s blog, we explore the laws and regulations relating to whose responsibility is the boiler: the tenant or the landlord.

The Law

Under the Landlord and Tenant Act (1985), the landlord is responsible for repairing and supplying water, gas, sanitation and electricity. A landlord is also responsible for arranging annual gas safety checks with a Gas Safe engineer. They do not necessarily need a boiler cover, but the repairs and maintenance of the boiler is the responsibility of the landlord.

The only exception to the landlord taking responsibility for boiler repairs is if the tenant caused the damage to the boiler. The tenant’s general responsibility is ensuring the general upkeep of the boiler is maintained, and reporting any issues they identify to their landlord.

Can tenants get boilers fixed on their own?

A tenant is not legally responsible for boiler repairs, unless caused by their own doing, therefore tenants should contact their landlords regarding the situation. Tenants should especially not attempt to repair the boiler themselves; not only is this dangerous, this can also cause issues with your boiler, which is your responsibility to amend.

In conclusion, if you are a tenant, your responsibilities are to maintain the boiler and to report any issues with your boiler to your landlord. Your landlord’s responsibilities are to ensure the boiler is annually serviced and repaired. To find out why you should annually service your boiler, please click here.

If you would like a boiler installing or repairing, please contact Bradford Boiler Company at info@bradfordboilercompany.co.uk or 01247 317169.

Boilers and Student Accommodation – What To Look Out For

Many students have started university this month and will likely be living in accommodation to complete their studies. An essential part of getting settled into your new accommodation is to check that all appliances, including your central heating system, are functioning correctly and efficiently. In this blog, we will discuss what to look out for and how to address any concerns.

Firstly, it is important to consider whether you are living on a university campus, or whether you are living in private accommodation. If you are living on the university’s campus, it is the responsibility of the university to address any heating concerns. If you are concerned about your boiler, you should contact your university. If you are in private accommodation, you will need to contact your landlord.

Signing the lease

If you are going to live in private accommodation, you should check out the central heating system in advance to ensure there are not any issues before moving in. This can include asking for evidence of a gas safety check certificate, checking for a sufficient fire and carbon monoxide alarm, and asking for the boiler to be turned on.

Issues living in accommodation

Boilers inevitably become less efficient as they age, and can stop functioning as well. This could occur while you are living in private accommodation, which can be difficult to deal with. If you start to notice any issues or concerns, you should raise them with your landlord. It is your landlord’s responsibility to resolve any issues with your boiler, so they should organise an annual servicing to ensure your boiler is running perfectly. To understand the importance and benefits to getting your boiler serviced annually, please click here.

What to look out for

There are many ways you can identify issues with your boiler, for safety or financial benefits. This includes:
-Soot build-up or a yellow flame: These are indicators of a carbon monoxide leak; make sure you have a carbon monoxide alarm and alert your landlord as soon as possible. To learn more about identifying signs of a carbon monoxide leak, please click here.
-Cold spots on radiators: Having cold spots at the top of your radiator when the central heating system is on is often an indication of air being trapped in your radiators. You should bleed your radiators and see if that improves the issue. We have a guide on how to safely bleed your radiators, which you can read here.
-Noise: If your radiators start to bang, clang or gurgle, then that can be an indication of there not being enough water in the system. You should contact your landlord immediately to get a specialist to check your boiler.

If you would like a boiler installing or repairing, please contact Bradford Boiler Company at info@bradfordboilercompany.co.uk or 01247 317169.

What size boiler should I get?

On average, boilers last 10 years before they need replacing. Once they break down or no longer work effectively, they need replacing. In this blog, we will explain which size boiler will be ideal for you and your home.

What does size mean in terms of boilers?

‘Size’, in the context of boilers, refers to kilowatts (kW). A “larger” boiler will have a larger amount of kWs; it will not necessarily be physically bigger. It is very important to keep in mind that you should purchase a boiler that suits your and your home’s needs; buying a boiler that has a larger kW than you need will only waste the fuel and will become a long-term financial burden. Likewise, it is also important to not try to save money by buying too little, as you will run out of hot water.

Types of boiler

Your boiler type will impact which size boiler you will need, due to how the different types of boiler are made. Before purchasing a boiler, you should consider which boiler type you have and which one would be beneficial for your hot water needs. The three types of boiler are:
-Combi boiler: A combi boiler is the most common type of boiler found in UK houses. Combi boilers are most efficient for small houses due to only heating the water you need.
-System boiler: A system boiler heats your hot water and heating system through a water cylinder, typically located in the attic. System boilers receive their water directly through the mains which is very useful for large houses.
-Conventional boiler: A conventional boiler heats your hot water and heating system through a water cylinder. Conventional boilers are useful for older buildings that may not be able to handle higher boiler pressure.

Count your radiators

One way to determine what size boiler you will need is to count your radiators. For example, if you live in a one-bedroom bungalow, you will need a smaller boiler than a 5 bedroom house, due to having a larger demand for hot water. Below are estimates to what size boiler you need, depending on the type of boiler, and how many radiators you have:

Combi boilers:
-Up to 10 radiators: 24kW – 27kW
-10 – 15 radiators: 28kW – 34kW
-15 – 20 radiators: 35kW – 42kW

System and Conventional boilers:
-Up to 10 radiators: 12kW – 15kW
-10 – 15 radiators: 18kW – 24kW
-15 – 20 radiators: 30kW – 40kW

Combi boilers require more energy due to heating the water instantly, unlike system and conventional boilers. It is very important to know which boiler type you have so you can ensure you purchase the correct size boiler, using the estimations above.

If you have any concerns or would like a boiler installed, please do not hesitate to contact Bradford Boiler Company at 01274 317169 or at info@bradfordboilercompany.co.uk.

Take a look at our range of boilers.

Bleeding Your Radiators: When and How To Safely Bleed Your Radiators

Sometimes it isn’t the boiler itself that causes issues with your heating; it can also be other components malfunctioning. There are certain times when you may need to bleed your radiators, such as when cold spots appear at the top of the radiator. Bleeding your radiator allows hot water to flow through your heating system. In this blog, we will explore when you should bleed your radiators, and how to safely do it.

When to bleed your radiators

There are a variety of reasons why you may need to bleed your radiators, including:
-Cold spots at the top of the radiator: This is the most common reason why a radiator needs bleeding. This occurs when the air becomes trapped in the radiator and is unable to escape, meaning the hot water cannot circulate through the radiator like it normally would.
-Damp or mould: If you start seeing mould or a room is damp after little usage, then this might be caused by your radiator. Mould is caused by bad circulation and humidity, so it is important to bleed your radiator if you start to notice that the room is damp or has mould.
-Rattling radiators: Noisy radiators, whether it be a rattling or gurgling sound, should be bled and checked for issues by a heating specialist. As there are a variety of reasons why a radiator might be making unusual sounds, it is best to also get it checked out in case there are any risks or if the radiator is close to breaking completely.

What tools do I need to bleed my radiators?

There are only two tools that you will need to successfully bleed your radiators: a radiator bleed key and anything that can catch water (such as a jug or a cloth). Radiator bleed keys can typically be found in hardware shops, but if not, a flat-headed screwdriver may also work.

How do I bleed my radiators?

Before starting to bleed your radiators, you must first identify which radiators need bleeding, as not all of your radiators may need it. You should start with the radiators closest to the boiler on the ground floor. From there, you should work your way backwards, away from the boiler. You should work your way from storey to storey.

Step 1: Make sure your heating is turned off and all of the radiators are cold.
Step 2: Place your jug or cloth under the bleed valve and insert the bleed key.
Step 3: Turn the bleed key anti-clockwise to loosen the valve; this will allow the trapped air to escape.
Step 4: Once the water starts to escape, turn the key clockwise to tighten the valve. When water starts to escape, this means that all of the trapped air has been released.
Step 5: Repeat on all radiators.
Step 6: Once all required radiators have bled, you should check the pressure to ensure it has not dropped.
Step 7: Turn on the heating to check if the radiators are working.

Additional Information

Can the heating be on while bleeding your radiators?
The heating MUST NOT be on while bleeding radiators due to how hot the water is. As some water may escape when bleeding the radiators, it could cause a burn if it comes into contact with your skin. In addition to this, more air may get into the radiator while the valve is loose if you have your heating on.

How can I tell if bleeding my radiators worked?
Once all radiators have bled, the heating should be turned back on to test the radiators. You should look for how long the radiators take to heat up, and if there are any cold spots on the radiator. If there are still issues after bleeding your radiators, you should contact a boiler specialist for further guidance.

How often should I bleed my radiators?
Though not essential, it is recommended to bleed your radiators once every 6 months to ensure that there are no build-ups of sludge or trapped air.

What are the advantages of bleeding my radiators?
There are a variety of benefits to bleeding your radiators such as:
-Efficiency: Your boiler and central heating system will be more effective at heating a room faster if the trapped air is removed regularly.
-Energy-efficient: As the radiators will not lose heat to the trapped air, less energy will be required to heat the room. This results in fewer fuels being burned and therefore is more environmentally friendly.
-Identify issues: If the radiators are already having issues, bleeding them will determine whether the trapped air was causing the problems or not. If bleeding your radiators doesn’t help, you should contact a heating specialist for further assistance.

If you would like a new boiler installed, or need any boiler assistance, please do not hesitate to contact us at info@bradfordboilercompany.co.uk or 01274 317169.

Boiler Pressure: A Guide To High Boiler Pressure and Low Boiler Pressure

Boiler breakdowns are never ideal, especially during the winter. One of the most common reasons for a boiler breakdown is the boiler’s pressure being either too high or too low. Boiler pressure isn’t always a big issue, as it can be adjusted without the need of a boiler specialist.

How to check the boiler pressure

As boiler pressure is the most common reason for a boiler breakdown, it is essential to check your boiler pressure. On most modern combi boilers, the pressure gauge can be found either on the front of the boiler or under the control panel. If your boiler is older, the pressure gauge might be located near the pipework. You can use your instruction manual if you are unsure where your pressure gauge is located.

It is useful to do a monthly check of your boiler to identify any obvious issues and to check that your boiler’s pressure is perfect. Boiler pressure may also be brought up during an annual service, so the specialist may fix it on your behalf and identify the cause of the issue. To find out the importance of annually servicing your boiler, please click here.

Standard boiler pressure

Standard boiler pressure is between 1 to 2 bars. Fortunately, most pressure gauges can show you if the pressure is perfect by using red and green sections. The green section means the boiler pressure is fine and doesn’t need changing. If it is in either of the red sections, it means the pressure is either too high or too low. Please be aware that your boiler may still continue to work, even if the pressure is too high or low, so it is important to check and adjust the pressure when necessary.

High boiler pressure

High boiler pressure is not always a serious issue; most boilers have mechanisms to counteract high pressure. Many boilers will shut down if the pressure is too high, or the valve may release some water into a small pipe away from the boiler to resolve the issue.

Signs of high boiler pressure

Unlike low boiler pressure, there are only two simple signs to look out for. If the system has shut down, or the gauge is in the red section, then the boiler pressure is high.

Causes of high boiler pressure

High boiler pressure is usually accidentally caused when adjusting boiler pressure. Sometimes, when fixing low boiler pressure, it might be adjusted too much and cause higher pressure than intended. In addition to this, if a valve is not tightened enough, this can cause too much water to flow, which can impact the pressure. If this is the case, you will need to tighten all valves to stop the overflowing of water.

If your boiler has high pressure and it was not caused by adjusting pressure or by having loose valves, then it is likely that your boiler is faulty, and may need checking for issues.

How to reduce high boiler pressure

In most cases, it is possible to reduce high boiler pressure without needing to contact a boiler specialist. If you follow these steps, but it continues to increase, then you should contact us for further guidance as it could be caused by a faulty boiler.

Step 1: Turn off your boiler
Step 2: Make sure all valves are tightened
Step 3: Once the system has cooled down, bleed your radiators. If you have any issues with bleeding your radiators, contact a professional immediately – it is very easy to bleed a radiator incorrectly!
Step 4: Check the pressure gauge. If the pressure is still high, bleed your radiators again

Low boiler pressure

Low boiler pressure is usually more noticeable than high boiler pressure due to the effects low boiler pressure has on heating the building. On Average, a boiler will need the pressure increasing between every 6 months to 12 months due to the heating system naturally heating and cooling water.

Signs of low boiler pressure

Low boiler pressure can cause no heating or hot water to go around the system due to there not being enough pressure in the system. If you notice these issues, you should check the gauge on your boiler (usually located on the front, on the front panel, or on the pipeline).

Another sign of low boiler pressure is the gauge showing the pressure in the red section. If it is only slightly low, you may not lose hot water or heating to a noticeable degree, so it is useful to check your boiler pressure from time to time to make sure it is not too high or low.

Causes of low boiler pressure

There are three main causes of low boiler pressure:
Water heating and cooling: Naturally, boilers will lose pressure over time due to water heating and cooling within the system. As a result of this, you may need to repressurise your heating system every 6 months – 12 months. If this is the case, this does not mean that your boiler is broken or there are any issues within the heating system, so there is no need to panic.
Small leaks: Sometimes, a leak may occur in the pipelines. These leaks can be so small that you may not notice any water escaping, but over time, the water escaping will build up and cause the pressure to decrease.
Bleeding your radiators: As water can escape when bleeding your radiators, it can slightly decrease the pressure

If you have high boiler pressure and reduce the pressure, you can also cause the boiler pressure to be too low. This is not a common cause of low boiler pressure but can be easily fixed.

How to increase low boiler pressure

Increasing your boiler’s pressure is a simple task and can be done without the help of a professional. By following these steps, you can repressurise your heating system:

Step 1: Turn off your boiler
Step 2: Locate either the filling loop or the keyed filling loop, depending on the type of boiler. The filling loop is a hose that connects to two water pipes, with two levers to control the valves. If you cannot find your filling loop, you should refer to the boiler manual.
Step 3: Turn both levers so they are aligned with the direction of the hose. If this is done correctly, you should hear water starting to run.
Step 4: Keep an eye on the gauge and stop the valves once the gauge hits roughly 1.2 bar. Make sure that both valves are closed to avoid high boiler pressure.

Top tip: Do not turn on your boiler straight away, you should wait before using it to check if the pressure is still decreasing. If the pressure continues to decrease, you should look for leaks. You should contact a boiler specialist if you suspect a leak, in order to amend it and receive the most appropriate recommendations for your specific heating system.

If you would like to learn more details about low boiler pressure, read our guide to low boiler pressure here.

In conclusion, usually boiler pressure being too high or too low is not a big problem. As you can adjust your boiler’s pressure, you can fix most pressure issues without the worry of having to call a boiler specialist. However, you should contact a boiler specialist if you have any concerns with adjusting your boiler pressure or you are still having issues after adjusting the pressure.

If you have any boiler concerns or would like a boiler installed, please do not hesitate to contact us at info@bradfordboilercompany.co.uk or 1274 317169.

How To Prepare Your Boiler For Winter

Winter is when your boiler is used the most to keep your house warm and cosy due to the decrease in temperature. Due to this, it is essential to maintain and look after your boiler to make sure it works effectively throughout the winter. In this blog, we will explain multiple ways to prepare your boiler for winter to reduce the chances of the boiler breaking.

Service your boiler

The most effective way to prepare your boiler for the winter is to service your boiler during the summer annually. You should service your boiler in Summer as you can identify any threats or potential future issues with your boiler to be able to counteract them before you need your boiler in the winter.

There are a variety of reasons to service your boiler annually, including:
-Detect issues
-Legal requirements
-Extending the lifetime of the boiler
-Saving money
If you are unsure why you should service your boiler, check out our in-depth blog about why it is significantly important to service your boiler here.

Complete an unofficial inspection

Before servicing your boiler, it is useful to conduct an unofficial inspection of the boiler. You should look for any obvious cracks and leaks, rusting and oxidation, and any signs of evaporated water on the inside of the boiler. You should also check the flame colour; if it is the standard blue, then it is healthy. If it is orange/yellow, it is likely a serious issue and you should contact Bradford Boiler Company immediately for advice.


In the lead-up to the winter, you should try to test your boiler for roughly 15 minutes every night to make sure that it works efficiently. Before it gets too cold and the boiler is in use more frequently, you should test it to make sure it heats your home fast. Sometimes, a boiler may stop working well if it has not been used for a while, so it is advised to test it during periods of little use.

Check your boiler’s pressure

The average boiler pressure should be between 1 and 1.5 bar. If your boiler pressure is too high or low, you can attempt to change the pressure yourself. If not, you can contact Bradford Boiler Company to seek advice and support. One way you can reduce the chances of the pressure changing is to turn your boiler on, even when it is warm. During warmer periods, you should turn your boiler on for roughly 15 minutes just to check that it works well.

Bleed your radiators

Bleeding your radiators can increase the efficiency of your boiler. If your radiators feel cold at the top when the heating is on, you should bleed them to release the trapped air in the system.

Insulate your pipes

In the winter, sometimes pipes may start to freeze, causing blockages and decreasing the efficiency of your boiler. This is caused by the water being left during the condensing process. Pipe insulation reduces the chances of freezing, but if your pipe still freezes with the insulation, you can defrost the pipe by using lukewarm water.

Check the thermostat

An incorrect reading from the thermostat can be a problem for a variety of reasons. The thermostat could be producing inaccurate temperatures, which could affect the temperature of your home. This can be by either overheating the house or by it simply not turning on. By testing your thermostat before the winter season, you can identify any issues and resolve them before you need your boiler.

Install a carbon monoxide alarm

Installing a carbon monoxide alarm is not just useful for the winter; it will help to keep you safe, regardless of the time of the year. Carbon monoxide is a deadly gas that is colourless and odourless, which can make detecting it without an alarm very difficult. To read more about the dangers of carbon monoxide, and how to protect yourself during a carbon monoxide leak, click here.

If you have any concerns or would like to have a new boiler installed, please contact us at info@bradfordboilercompany.co.uk or 01274 317168.

Energy Efficient Boilers

When looking to purchase a new boiler, energy efficiency is often an overlooked part of the decision as it is not often fully understood. An inefficient boiler can lead to lukewarm radiators and increased bills if not properly maintained or replaced, if necessary.

Energy efficiency refers to the amount of energy used to heat your home. An efficient boiler will use less energy to heat your home, which is very cost-effective. Less efficient boilers will require more energy to heat your home, which will cost you more.

What causes a boiler to be inefficient?

Naturally, boilers will never be 100% efficient as some heat is lost through hot gas through the flue. In addition to this, boilers will naturally become less efficient the older they get, which can often be a reason to purchase a new boiler.

Older models of boilers are often less efficient as they are often not built as condensing boilers. Condensing boilers are one of the best types of boilers for efficiency due to condensing vapour, which preserves more energy.

Energy ratings

In the UK, there are two types of energy ratings you may encounter: ErP and SEDBUK. Depending on the age and where the boiler was manufactured will affect which energy rating you encounter.


Energy-related Products (ErP) are a measurement used by the European Union to measure the efficiency of water heating systems, including boilers. The ErP scale ranges from A – G, with A being the most efficient and G being the least. A-rated boilers are at least 90% efficient, while G rated boilers are less than 70% efficient.


Seasonal Efficiency of a Domestic Boiler (SEDBUK) is a measurement used in the UK to determine the efficiency of a boiler made in the UK. There are two versions of the SEDBUK, the 2005 version is a scale from A – G, with the 2009 version replacing the A – G grading with percentages. Since 2015, both of these versions have stopped being used; they have now been replaced with the ErP measurement.


There are variety of benefits to getting a more efficient boiler, including:
-Reduced bills: As the boiler is more efficient, this means less energy is required to heat the home. This consequently decreases the bills.
-Carbon footprint: Due to less energy being required to heat your home, this improves the carbon footprint of your home.

How to maintain efficiency

Over time, a boiler’s efficiency will decrease due to ageing. To maintain the efficiency and reduce the decline, you should:
Service your boiler – Boilers should be serviced annually to check for faults and potential issues. By regularly servicing your boiler, you can avoid any faults that may affect how efficient the boiler is.
-Bleed your radiators when needed: From time to time, your radiators may need bleeding to improve the efficiency of the boiler. If your radiators take a while to heat up or have cold spots, you should bleed your radiators.
-Test your heating monthly: Even in summer, you should test your heating monthly for a few minutes to make sure it is still working with no issues. This is especially important as it will allow you to check for faults when waiting for the next service.

If you have any questions or would like to replace your current boiler with a more efficient boiler, contact us today at info@bradfordboilercompany.co.uk or at 01274 317169.

Should I Repair or Replace My Boiler?

Having a boiler breakdown, especially during colder periods of time, is a nightmare; you are left without heating until your local boiler expert can fix it. If it’s just a one-off repair, then it is inconvenient, but if it is recurring, then it might be time to consider replacing the boiler.

Sometimes it can be difficult to decide whether to repair or replace your boiler as it could just be an occasional repair or service it may need, or it could be a financial nightmare with regular repairs required. In this blog, we will review when it might be a good idea to repair, or replace your boiler.


Sometimes when a boiler breaks down, there can be small DIY fixes that can be used to reduce the chances of needing a boiler repair expert. A few fixes that you can do include:
-Thaw any frozen pipes using hot water.
-Bleed your radiators.
-Ensure the thermostat is set to the correct time. If you own a smart thermostat, you should check that it is connected to the boiler.
If none of these fixes works, then you should contact your local boiler repair experts to fix your boiler.


Newer boilers have been ranked on an efficiency scale, from A – G. A-rated boilers are the most efficient types of boilers, averagely being above 90% efficient. Meanwhile, G-rated boilers are the least efficient types of boilers, averagely being below 70% efficient.

One reason you may wish to replace your boiler is if it is rated lower on the efficiency scale. Not only is having an efficient boiler more environmentally friendly, it is also cheaper to run long-term.


Boilers, from time to time, will break down. The seriousness and the frequency of the breakdown will affect whether you should repair or replace your boiler. If the boiler is regularly breaking down, then you should replace your boiler as this will reduce costs long term. If the boiler rarely breaks down, then you should look to repair your boiler by contacting your local boiler company.


It is important to check your warranty; you should always check to make sure you are still under warranty, and follow all guidelines set in the contract. If your boiler is still under warranty, then it is worth getting your boiler repaired as it will usually cover the costs of new parts, and potentially even the labour costs.


When debating whether to repair or replace our boiler, you should think about the future: how long will this boiler realistically last? If the boiler has very minor faults, then you may think it’s better to repair your boiler since it’ll likely last for years. If your boiler realistically won’t last longer than a few years without regular repairs, then it is best to replace your boiler. In addition to this, you may also need to consider the boiler’s age; will there likely be easily accessible parts available in the future?


Purchasing a new boiler can be expensive as they are a long term investment. This reason alone is why many people are hesitant to replace their boiler when they identify problems with their current boiler. When you are considering whether to replace your boiler, you should identify any long term costs; will you often have to pay for repairs? If you think that long term the cost of repairing your boiler will be larger than the cost of purchasing a new boiler, then you should consider replacing your boiler.

Parts for repairs

As a boiler model begins to age, parts for repairs can become progressively more difficult to replace. This means that sometimes a boiler repair expert may tell you to replace your boiler to ensure that long term, you can access parts required for any future boiler breakdowns.

Warning signs

There are certain warning signs that you should look for when it comes to your boiler. Some of these signs can be fixed, however, a replacement might be on the table depending on the damage:
-Unusual sounds – Boilers can make sounds when starting up, but if they start to make unusual banging, gurgling or clunking sounds, then it is important to call a local boiler repair expert to identify any issues. The expert may suggest that the boiler should be replaced if the boiler is very damaged.
-Bad odours – Naturally, boilers do not create an odour, so if you notice a faint bad odour from the boiler, you should immediately call a boiler expert. A smell from a boiler is likely a carbon monoxide leak. Despite carbon monoxide gas being odourless, a leak does have a smell due to the boiler not burning properly. We have written a blog about signs of a carbon monoxide leak, and how to deal with one. Read our blog here.
-Radiators – One common detected issue with boilers as they start to age is radiators taking longer to heat up. There are multiple reasons why radiators can start to take longer heating up, including age, or your central heating system is full of sludge. You should contact your local boiler repair expert to find the cause of the issue. They might be able to flush your central heating system if sludge is present, but they may suggest replacing your boiler if it is down to age or wear.


In conclusion, it can be difficult to determine when to repair or replace your boiler. Depending on the state of the boiler, sometimes it is financially beneficial to purchase a new boiler.

-Younger boiler
-Highly efficient boiler
-Under warranty
-Minor faults

-Older boiler
-Bad sounds or odours
-Costs of repairs
-Regular breakdowns
-No warranty

Please be aware that there are given circumstances where these may not apply. If you are unsure whether to repair or replace your boiler, you should contact us at info@bradfordboilercompany.co.uk or at 01274 317169.

Take a look at our range of boilers.