In this comprehensive guide, we’ll explore the importance of regular boiler servicing, when and how often to service your boiler, signs that it needs immediate attention and the consequences of skipping regular service. We’ll also lay out the boiler servicing process, what to expect during a service visit and the costs associated with boiler servicing.

How Often to Service Your Boiler: General Recommendations

How often you should service your boiler can vary depending on several factors. Here’s a breakdown of the general recommendations for how often to get your boiler serviced.

Manufacturer’s Guidelines

One of the most reliable sources of information on how often to service your boiler is the manufacturer’s guidelines. Manufacturers design their boilers with specific servicing intervals in mind. These recommendations are based on the boiler’s design, components, and expected wear and tear. Adhering to these guidelines is crucial for maintaining the warranty on your boiler, so be sure to check the manual if you’re unsure of anything. Alternatively, you can contact a gas-safe engineer to hear what they would recommend.  

Type of Boiler

The type of boiler you have also affects the recommended servicing frequency. There are three primary types of boilers: combi, system, and conventional.

  • Combi Boilers: Combi boilers are known for their compact size and efficiency. They provide hot water on demand and are typically low-maintenance. Annual servicing is generally sufficient for most combi boilers
  • System Boilers: System boilers have a hot water cylinder, making them suitable for larger households. They typically require servicing every 1-2 years.
  • Conventional Boilers: Conventional boilers, also known as heat-only boilers, have a separate hot water tank and cold water storage tank. Due to their complexity, they should be serviced annually.

Boiler Age

The age of your boiler is a critical factor in determining how often it should be serviced. Newer models tend to be more efficient and reliable, which means they may require servicing less often. However, even new boilers benefit from an annual check to ensure they remain in top condition.

For older boilers, more frequent servicing is advisable. The wear and tear on components over time can lead to more frequent issues. Annual servicing for older boilers can help catch problems before they escalate.

The Importance of Regular Boiler Servicing

The Importance of Regular Boiler Servicing

Regular boiler services are essential for several reasons. Many boiler manufacturers will not honour their warranty terms and conditions if you cannot prove that you have had annual servicing done. However, there are also more pressing matters of importance when it comes to how often to service your boiler.  

Safety First

Safety is paramount when it comes to your boiler. A well-maintained boiler is less likely to develop faults that can result in potentially dangerous situations. One of the most significant dangers associated with boilers is the risk of carbon monoxide leaks. This odourless, colourless gas can be deadly if it accumulates in your home and you or a member of your household inhales it. Regular servicing includes checking for leaks and ensuring that your boiler’s exhaust system is functioning correctly, which greatly reduces the risk of carbon monoxide poisoning. A gas-safe engineer will conduct a leak test during their visit. 

Efficiency Matters

Efficiency is another critical aspect of boiler servicing. A well-maintained boiler operates more efficiently, which means it uses less energy to provide the same level of heat. This translates to lower energy bills, saving you money in the long run. Additionally, an efficient boiler reduces your carbon footprint by consuming fewer resources, making regular services a key aspect when living in a more energy-efficient home. 

Long-Term Savings

While the cost of a boiler service may seem like an expense, it’s an investment that can lead to significant long-term savings. Regular servicing helps identify and address small issues before they become major problems. Preventing major breakdowns and extending the lifespan of your boiler can save you from expensive repairs or replacements in the future. Major issues are usually very expensive to fork out for, which is why it’s important to take preventative measures by getting boiler services often.  

The Importance of Regular Boiler Servicing

Signs Your Boiler Needs Immediate Service

Regular servicing is crucial, but it’s also essential to keep an eye out for signs that your boiler may need immediate attention. Here are some common indicators that your boiler requires servicing:

Unusual Noises

Boilers should operate quietly. If you hear strange noises such as banging, clanking, or hissing, it could indicate issues with your boiler. These noises might be due to air in the system, a faulty pump, or other mechanical problems. 

Reduced Efficiency

If your boiler is taking longer to heat up your home or hot water, it’s a sign of reduced efficiency. This can be due to various issues, including a buildup of sediment in components, faulty thermostats, or worn-out parts. 

Warning Lights or Error Codes

Modern boilers are equipped with warning lights and error codes to alert you to problems. If you see any warning lights or error codes displayed on your boiler, it’s crucial to take action. These codes provide valuable information about the nature of the issue, and a trained gas-safe engineer will know what to do. 

Signs Your Boiler Needs Immediate Service

Consequences of Skipping Regular Service

Ignoring regular boiler servicing can lead to several undesirable consequences, some of which can be costly and even dangerous.

Safety Risks

Skipping servicing increases the risk of safety hazards, the most significant being carbon monoxide leaks. Carbon monoxide is a silent killer, and without regular maintenance, your boiler might develop issues that lead to leaks. These leaks can result from a cracked heat exchanger, a faulty flue, or other internal problems. Regular servicing ensures your home remains safe.

Reduced Lifespan

Boilers are designed to last for many years, but neglecting maintenance can significantly reduce their lifespan. Components wear out faster, and small problems can escalate into major breakdowns. Regular servicing can extend the life of your boiler and keep it running smoothly.

Potential for Costly Repairs

Small issues left unattended can develop into costly repairs. By the time you notice a problem, it may have already damaged multiple components. Repairing or replacing these parts can be expensive. Regular servicing can catch problems early, preventing them from growing into major repairs.

The Boiler Servicing Process

Understanding what happens during a boiler servicing visit can help you to prepare for your service and emphasise its importance.

What to Expect During a Service Visit

When your gas-safe engineer pays you a visit for your boiler service, the process will be something along these lines. 

  1. Visual Inspection: The gas-safe engineer will begin with a visual inspection, checking for any obvious signs of wear, damage, or leaks. This includes examining the boiler’s exterior, pipework, and radiators.
  2. Internal Inspection: The gas-safe engineer will open up the boiler to inspect its internal components, including the heat exchanger, burner, and flue. They will clean any build-up of debris and check for any damage or wear.
  3. Safety Checks: Safety is a top priority, so the gas-safe engineer will test the boiler for carbon monoxide emissions. They will also ensure that the ventilation and exhaust systems are functioning correctly.
  4. Efficiency Assessment: The gas-safe engineer will assess the boiler’s efficiency by measuring its combustion and heat output. If necessary, they will make adjustments to optimise efficiency.
  5. Testing Controls: The controls of the boiler, including thermostats and timers, will be tested to ensure they are working correctly.
  6. Flue Inspection: The flue, responsible for venting harmful gases out of your home, will be inspected for any blockages or damage.
  7. Cleaning and Maintenance: Any necessary cleaning and maintenance will be performed during the visit, such as removing debris, lubricating moving parts, and replacing worn-out components.

Duration and Cost

The duration of a boiler servicing visit typically ranges from 1 to 2 hours, depending on the complexity of the system and the extent of the service required. The cost can vary based on your location, the service provider, and the type of boiler you have. 

On average, you can expect to pay anywhere from £120 to £130 for a standard boiler service. Keep in mind that this cost is a small price to pay for the safety, efficiency, and long-term savings that regular servicing provides. BPS can also help you with financing options in the event of major expenses.


The safety, efficiency, and long-term savings regular boiler servicing offers make it a crucial aspect of home maintenance. By adhering to the manufacturer’s recommendations, considering your boiler type and age, and paying attention to signs that your boiler needs immediate attention, you can ensure your home remains warm, safe, and cost-effective.

Don’t overlook the importance of boiler maintenance. Reach out to our team of professionals at BPS Plumbing & Heating for your boiler servicing needs. Our experienced gas-safe engineers can provide the peace of mind that comes with a well-maintained boiler, keeping your home safe and comfortable all year-round.