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Last updated: 23rd April, 2024


When Does a New Boiler Need Its First Service?

When Does a New Boiler Need Its First Service?

Key takeaways

  • The first boiler service is usually scheduled within 12 months after installation.
  • Regular servicing is vital for maintaining boiler efficiency and overall safety.
  • Compliance with warranty terms and scheduled maintenance can prevent costly breakdowns.

Having your boiler serviced regularly is important for ensuring its safety and efficiency, but many homeowners are unsure about when their new boiler needs its first service. Our guide explores the recommended timeline for boiler servicing, including when a new boiler needs its first service and how often it should be serviced thereafter.

A new boiler is a significant investment for any homeowner, and ensuring its longevity and efficiency is of utmost importance. One crucial aspect of boiler maintenance is scheduling its first service, which can often be a source of confusion for many. 

Knowing when to service a new boiler is essential, not only for complying with the warranty terms but also for maintaining the performance of the heating system.

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Boiler servicing involves a thorough inspection of the unit by a qualified professional, checking for any faults, leaks, or potential issues that may arise in the future. The first service usually takes place within 12 months of installation, as a general consensus among manufacturers. 

This initial service is a crucial step in maintaining the boiler's proper functioning, preventing unforeseen breakdowns and ensuring the safety of the home's occupants, primarily by preventing any risk of carbon monoxide poisoning.

Understanding Boiler Servicing

When it comes to maintaining the efficiency and safety of your boiler, regular servicing is crucial. Just like a car, a boiler needs consistent maintenance to ensure it operates at its best. 

After installing a new boiler, it's essential to schedule the first service according to the manufacturer's recommendations.

Typically, boiler manufacturers advise conducting the first service 12 months after installation. However, it's always good to double-check the specific requirements of your boiler's warranty for clear guidance. 

Following this initial service, it is widely recommended to schedule a boiler service once a year to extend its lifespan and maintain optimal performance.

During a boiler service, a Gas Safe registered engineer thoroughly examines your boiler, assessing its efficiency, general maintenance, and safety features. The primary goal of these inspections is to identify potential faults or long-term issues that may lead to costly breakdowns or unsafe operations. 

Regular servicing also helps ensure that your boiler is operating efficiently, which can contribute to lower energy bills and a reduced carbon footprint.

When booking a boiler service, it's crucial to hire an experienced, Gas Safe registered engineer who will perform a range of checks and inspections, including:

  • Visual examination of the boiler and its parts

  • Testing and checking safety devices

  • Evaluating the boiler’s combustion and efficiency

  • Inspecting the flue and ensuring proper ventilation

  • Assessing the integrity of its seals and pipework

  • Cleaning and replacing necessary components

In summary, boiler servicing is a vital aspect of owning any boiler system. By scheduling your boiler's first service 12 months after installation and ensuring annual check-ups thereafter, you can help extend its lifespan, maintain efficiency, and maximise the safety of your home.

New Boiler: When to Service

A crucial aspect of maintaining a new boiler is scheduling its first service. Though it might be tempting to assume that a brand-new boiler wouldn't require significant attention, routine maintenance is key to ensuring its efficiency and longevity.

For most boilers, the first service should be conducted 12 months after installation. This initial time frame is recommended by the majority of manufacturers and aligns with warranty requirements. Failing to service the boiler within this period may invalidate the warranty, leaving you unprotected in the event of any unexpected issues or faults.

Yearly servicing is the norm following the initial service. This preventive measure allows for the early identification of potential problems, which can help avoid costly breakdowns and ensure the system operates safely. Carbon monoxide poisoning, for instance, can result from a leak within a gas appliance—a silent but dangerous gas that may be detected through regular servicing appointments.

In summary, it's essential to schedule your new boiler's first service around 12 months after installation, and follow up with annual servicing appointments. By doing so, one can maintain optimal boiler performance, validate the manufacturer warranty, and potentially prevent hazardous situations. Remember that proper care and maintenance go a long way in maximising the service life of your new boiler.

Cost of First Boiler Service

The cost of first boiler service is an important factor for homeowners and businesses to consider. While prices can vary depending on the type and brand of boiler, as well as the location and expertise of the engineer, understanding the average costs can help budget accordingly.

Typically, a standard boiler service shouldn't cost more than £100. This price usually includes visual inspections, checks to ensure the boiler is operating efficiently, and an assessment of potential safety hazards. 

However, in some instances, a more thorough service may be required. In these cases, expect to pay between £150 and £225. This type of service involves replacing parts like electrodes and burner door gaskets, and performing a comprehensive strip-down and cleaning procedure for long-term boiler health.

It's worth noting that first-time boiler servicing costs may sometimes be covered under the warranty provided by the manufacturer. This means that if any issues are identified and resolved during the service, the costs may be fully or partially covered. 

To take advantage of this, make sure to adhere to the manufacturer's recommended servicing schedule, which generally entails an initial service within the first year of installation.

In order to ensure a cost-effective and quality service, homeowners are advised to seek quotes from multiple engineers or service providers. Choosing a Gas Safe registered engineer is crucial for safety and compliance with UK regulations. Additionally, don't hesitate to ask for a detailed breakdown of costs and services included in the quote. This level of transparency will enable more informed decision-making and help ensure the most value for money.

In summary, the cost of first boiler service is an essential consideration for maintaining the efficiency and longevity of a boiler system. By understanding the average costs, potential warranty coverage, and the importance of choosing a reputable service provider, homeowners can effectively budget and plan for this important maintenance task.

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The Role of Gas Safe Engineers

Gas Safe engineers play a crucial role in ensuring the safety and efficiency of your new boiler. These professionals are well-trained and certified in handling gas appliances, including boilers. To become a Gas Safe registered engineer, one must undergo a rigorous assessment process and demonstrate a high level of competence in dealing with gas-related equipment.

The Gas Safe Register is the official UK body responsible for the regulation of gas engineers. Engaging a registered Gas Safe engineer is essential when it comes to servicing and maintaining your new boiler. Not only do these experts possess the skills and knowledge required, but they are also legally allowed to work on gas appliances.

One of the primary responsibilities of a Gas Safe registered engineer is to carry out routine boiler services. This includes inspecting the boiler and surrounding pipework, checking for any visual problems such as cracks, leaks or corrosion. Moreover, these engineers will test the boiler and its controls to ensure everything is functioning correctly.

When it comes to the first service of a new boiler, it is generally recommended that this is done within the first 12 months of installation. This not only helps to maintain the boiler's warranty conditions but also prevents any potential hazards or breakdowns. Additionally, annual boiler services by a registered Gas Safe engineer will keep your boiler operating efficiently and safely.

In summary, Gas Safe registered engineers play a vital role in maintaining the safety and efficiency of your new boiler. Regular servicing by these experts is essential for prolonging the life of your investment and ensuring optimal performance.

Importance of Annual Service

Regular annual boiler services are essential to keep your boiler running efficiently and safely. They ensure that your boiler is in good condition and comply with the terms of the warranty. By scheduling an annual service, you reduce the risk of potential breakdowns and costly repairs.

The annual service consists of a thorough examination of the boiler by a qualified engineer, which involves checking components, clearing obstructions, and verifying functionality. This process detects underlying issues before they escalate, ultimately prolonging the lifespan of the boiler.

Moreover, an annual boiler service safeguards both your health and your property. A poorly maintained boiler may emit hazardous carbon monoxide fumes, which can be life-threatening. Regular servicing helps prevent these risks, giving you peace of mind and ensuring the safety of your household.

Furthermore, annual boiler services contribute to energy efficiency. A well-maintained boiler uses less energy and provides consistent heating, reducing your energy bills and carbon footprint. In this way, regular servicing not only keeps your boiler in good working order but also contributes to environmental sustainability.

In conclusion, the importance of an annual boiler service cannot be overstated. Regular servicing is crucial for maintaining the boiler's warranty, ensuring safety, enhancing efficiency, and extending the boiler's lifespan. To reap these benefits, make sure to schedule your annual boiler service with a qualified engineer.

Factors Affecting Boiler Efficiency

When considering the efficiency of a new boiler, various factors come into play. These factors not only determine how efficient the boiler will be but also contribute to its overall performance and service life.

One of the main elements affecting a boiler's efficiency is the type of fuel it utilises. Boilers can be powered by natural gas, oil, or electricity. Typically, gas boilers are known for their higher efficiency levels compared to oil and electric boilers.

Another significant aspect in determining a boiler's efficiency is its technology and design. Modern boilers come with advanced features, such as condensing technology, which enables them to extract more heat from the fuel they burn. This advancement allows newer boilers to reach efficiency levels of up to 90% or even higher in some cases.

Proper installation and regular maintenance also play a crucial role in a boiler's efficiency. A well-installed and maintained boiler will function at its optimal efficiency and last longer. It is essential to schedule an annual service for your boiler to ensure it's running smoothly and safely.

The size and insulation of the property can also directly affect a boiler's efficiency. Properly sized boilers provide heat more effectively, without wasting energy, and adequately insulated buildings help retain heat, reducing the load on the boiler system. Choosing the right boiler size for your property and ensuring effective insulation are vital steps in achieving a highly efficient boiler system.

To summarise, factors such as fuel type, boiler technology and design, proper installation, regular maintenance, and the property's size and insulation all contribute to the efficiency of a boiler. Understanding these factors allows homeowners to make informed decisions when selecting and maintaining their heating systems to ensure optimal efficiency and performance

Impact on Bills

A new boiler can have a significant impact on your bills, particularly energy and utility bills. Modern boilers are designed with improved efficiency, which means they consume less energy to produce the same amount of heat as older models. This, in turn, leads to reduced energy bills, allowing you to save money on heating expenses.

Furthermore, a well-maintained boiler optimises energy usage, which can be particularly important for those on a budget. The first service, ideally conducted 12 months after installation, is essential to ensure that the boiler is operating at peak performance. An efficient boiler will not only help you save money on your utility bills but may also prolong the lifespan of the appliance.

In addition to the direct impact on energy bills, servicing your new boiler can also help prevent unexpected repair costs. A well-maintained boiler is less likely to experience breakdowns, meaning fewer chances of incurring expensive call-out fees and repairs. Moreover, some boiler warranties require regular servicing to remain valid, so skipping the first service may lead to unnecessary costs if problems occur later on.

To summarise, scheduling the first service for your new boiler is an investment in long-term savings on bills. Improved efficiency and reduced energy consumption contribute to lower utility costs, while regular maintenance can help you avoid future repair and call-out expenses.

Installation and Warranty Issues

Upon installing a new boiler, it's essential to be aware of the manufacturer's guidelines and warranty terms. Typically, a new boiler requires its first service 12 months after installation to meet warranty requirements. Apart from maintaining the validity of the warranty, regular servicing also ensures the boiler's efficient and safe operation.

Manufacturer warranties play a crucial role in covering repair costs if any faults occur within the specified period. Most boilers come with a one-year standard warranty, but the total length can range from 1 to 10 years. Knowing the details of your boiler's warranty is vital to prevent unexpected expenses and to uphold your rights as a consumer.

It's a common misconception that modern boilers don't need a warranty. In reality, all boilers, regardless of their make and model, benefit from reliable coverage. Warranty terms may differ among manufacturers, so understanding the specifics of your boiler warranty will help you make informed decisions about maintenance, servicing, and repairs.

Boilers, like any other appliances, are prone to wear and tear. Regular servicing, starting with the first service 12 months after installation, helps detect and address potential issues, including those related to carbon monoxide leaks. Carbon monoxide is a dangerous, odourless gas that can result from leaks in gas appliances, posing a severe risk to your home and health.

In conclusion, staying informed about your boiler's installation and warranty requirements is essential for maintaining efficiency, safety, and fulfilling manufacturer guidelines. Don't hesitate to reach out to your boiler manufacturer if you're ever unsure or require assistance to ensure your appliance's optimal performance.

Heating System Management

Proper heating system management is essential to prolong the life and efficiency of your central heating system. Regular maintenance not only ensures energy-efficient operation but also maintains a safe environment in your home.

The significance of a boiler in the central heating system is paramount. Therefore, after installing a new boiler, it's crucial to service it within the first 12 months to comply with the terms of your warranty and avoid serious issues from arising.

One major reason to service your boiler yearly is the prevention of carbon monoxide poisoning. This odourless gas can leak from faulty appliances, posing a risk to the occupants of the property. A well-maintained boiler is less likely to emit harmful gases.

Servicing your boiler doesn't just mean safety; it also extends the lifespan of the appliance. During a service, the engineer can identify potential problems before they escalate, ultimately saving you money on expensive repairs.

Moreover, a regularly serviced boiler runs more efficiently, requiring less energy to heat your home and lowering your energy bills. Annual maintenance reduces the risk of breakdowns and ensures a consistent heat output, which ultimately keeps your central heating system operating optimally.

In addition to your boiler, the entire heating system must undergo frequent checks. This includes radiators, valves, pumps, and pipes. By routinely assessing these components, you can maintain the overall efficiency of your central heating system and minimise energy wastage.

Remember to employ a Gas Safe licensed engineer to service your gas boiler. They are skilled professionals trained to handle gas appliances and heating systems, ensuring that your home remains safe and comfortable.

Dealing with Boiler Repairs

When it comes to maintaining your new boiler, being proactive in identifying potential faults can save you time, money, and prevent serious issues from arising. In many cases, the first boiler service should be carried out one year after installation, as this ensures compliance with the warranty terms. Subsequently, servicing is recommended to be conducted every 12 months.

During a boiler's lifespan, it may experience a variety of common faults. These can range from simple problems such as water leaks and pressure issues to more serious concerns like carbon monoxide leaks. To ensure the longevity and performance of your boiler, it is crucial to deal with these faults as they arise.

Boiler repairs should always be carried out by qualified professionals. Relying on expert knowledge and experience, they will assess the issue, determine the appropriate course of action, and carry out the necessary repairs. In some cases, a full replacement boiler may be required. This typically occurs when the existing boiler has reached the end of its usable life, experiences repeat faults, or when a repair would be more costly than a replacement.

In order to minimise the frequency of repairs and prolong the life of your boiler, it is essential to conduct regular preventative maintenance. This may include:

  • Scheduling annual boiler services

  • Keeping an eye on boiler pressure

  • Ensuring proper ventilation around the boiler

  • Bleeding radiators to release trapped air and improve efficiency

By following these guidelines, homeowners can reduce the need for repairs, extend the life of their boiler, and ensure optimal performance throughout its lifetime. Ultimately, taking a proactive approach to boiler maintenance and seeking professional assistance for any necessary repairs will contribute to the lasting success of your boiler system.

In order to ensure the safety of a new boiler installation and prevent issues like gas leaks or carbon monoxide poisoning, it's crucial to follow specific legal requirements and safety checks. The first service for a new boiler typically needs to be conducted 12 months after installation to comply with the terms of the warranty and maintain safety standards.

One of the main concerns with gas appliances, such as a boiler, is the potential for leaks that could lead to carbon monoxide emission. Carbon monoxide is a highly dangerous, odourless gas, and exposure may cause severe health issues or even death. Regular boiler servicing helps identify any leaks or issues, preventing harmful consequences related to carbon monoxide poisoning.

Landlords have a legal obligation to carry out annual safety checks and maintain gas appliances, pipework, and flues provided for tenants' use. As part of these safety checks, a gas safety certificate (also known as a CP12) must be issued by a Gas Safe registered engineer. This documentation proves that the boiler, as well as other gas appliances, are safe for use. Tenants are entitled to receive a copy of the gas safety certificate within 28 days of the annual check.

Moreover, the Gas Safety (Installation and Use) Regulations 1998 enforce legal requirements that safeguard occupants against risks associated with gas installations and appliances, including boilers. The regulations are continuously reviewed, with the latest updates published on 3rd October 1998.

By adhering to the guidelines outlined by the Gas Safety Regulations and fulfilling all legal requirements concerning boiler servicing, landlords can ensure the safety of their tenants, while homeowners can have peace of mind that their boiler is operating efficiently and securely. Regular boiler servicing not only preserves the warranty but also helps to identify minor issues before they become major problems, ensuring the continued safe use of the gas appliance.

Understanding Boiler Components

A boiler is a complex system comprising numerous components such as the heat exchanger, flue, pressure vessel and radiators. To ensure optimal performance and safety, it is crucial to thoroughly inspect, clean, and maintain these parts during the first service and beyond.

The heat exchanger is a core component of the boiler responsible for transferring heat from the combustion gases to the water, ultimately providing warmth to your home. Over time, deposits and grime may build up on this component, reducing its efficiency. Therefore, cleaning the heat exchanger should be a top priority during a service. Checking for any signs of corrosion or leakages in the seals is also vital to prevent potential issues.

The flue is another essential element in a boiler system. It safely channels waste gases and excess heat away from the boiler. A thorough inspection of the flue ensures there are no blockages or leaks, thus protecting your home from harmful carbon monoxide emissions.

In a sealed central heating system, the expansion vessel absorbs excess pressure created as water heat expands. Regularly checking the pressure in the expansion vessel, as well as examining the seals for any signs of wear or deterioration, is crucial to ensuring your boiler operates efficiently and safely.

A boiler service should also entail inspecting electrical connections, such as wiring and safety devices. Loose or damaged connections can pose a risk to both the boiler's functioning and your household's safety. Furthermore, a trained professional will test safety devices, like pressure relief valves and thermostats, to guarantee they are in excellent working order.

As part of the service, fans play a significant role in ventilating your boiler by pushing waste gases through the flue. An engineer will evaluate the fans' condition and performance to ensure proper airflow and prevent any risks related to exhaust fumes.

Finally, your radiators and boiler cover must be examined for any signs of damage, leakage, corrosion, or blockages. Such issues can affect the heat distribution in your home or lead to more serious problems, if left unaddressed.

During the first boiler service, a comprehensive report should be produced, detailing the inspection process, findings, and any necessary follow-up actions. By maintaining and servicing your boiler regularly, you can ensure your system remains safe, efficient, and reliable for years to come.

Preparation for Winter

A well-maintained boiler is essential for ensuring a warm and comfortable home during the winter months. As the temperature drops, the demand for hot water and heating increases, putting more strain on your boiler. To avoid any disruption to your heating system and showers, it is crucial to prepare your boiler for the winter season.

One of the first steps in getting your boiler ready for winter is scheduling its first service. Typically, a new boiler should have its initial service 12 months after installation, followed by regular yearly maintenance. This helps to maintain the boiler's efficiency, prolong its lifespan, and comply with the terms of the warranty.

An appropriate time to arrange a boiler service is during the summer, or at least late spring. This allows heating engineers to identify and address any potential issues before the peak winter months. Additionally, as there is often a higher demand for heating engineers during the winter, scheduling a service off-season can be more convenient and timely.

During the service, a qualified heating engineer will conduct a thorough inspection of your boiler, checking for any wear, leaks, or blockages. They will also clean various components and ensure that the boiler is operating safely and efficiently. This can help prevent the risk of carbon monoxide exposure, an odourless and potentially deadly gas that can result from leaks within the appliance.

In addition to the boiler service, homeowners can take several steps to ensure their heating system is ready for the colder months. These may include:

  • Insulating pipes: To prevent potential freezing and bursting of pipes during extreme cold, it is recommended to insulate exposed pipes with proper insulation materials.

  • Bleeding radiators: Releasing trapped air from radiators allows the hot water to flow more efficiently, ensuring all rooms are heated adequately and evenly.

  • Thermostat settings: Reviewing the settings of your thermostat can help you maintain a comfortable temperature in your home while preventing energy waste.

In conclusion, by scheduling an annual boiler service, homeowners can efficiently prepare for winter, avoiding any disruptions to their heating system or showers. Regular maintenance will not just ensure warmth and comfort during the cold season, but could also extend the life of the boiler and keep your home safe from potentially hazardous gas leaks.

When to Replace Your Boiler

Typically, a boiler should last between 10 and 15 years, sometimes even longer if it's well-maintained. To prolong its lifespan, homeowners should schedule annual services and keep the area around the boiler clean. However, boilers over 15 years old often become inefficient, leading to increased running costs and a negative environmental impact.

If a boiler starts to show signs of wear or its performance begins to decline, it's wise to consider a replacement. Some indicators that may suggest it's time for a new boiler are:

  • Frequent breakdowns: If your boiler is experiencing regular issues or requires constant repairs, it may be more cost-effective to invest in a new one.

  • Rising energy bills: If your energy bills are increasing without any significant change in usage, it could be a sign that your boiler is losing efficiency, resulting in higher running costs.

  • Inconsistent heating: If your home isn't warming up evenly or you're noticing fluctuations in temperature, your boiler may be struggling to meet the demands of the heating system.

  • Leaking: Any signs of water leakage around the boiler should be taken seriously, as it could indicate internal corrosion or damage that could worsen over time.

  • Loud noises: If your normally quiet boiler begins to emit unusual or loud noises, it might be time to consider a replacement. This could signify internal damage or wear.

Remember, staying proactive and addressing these issues before they escalate can save you money, prevent potential damage to your property, and ensure overall safety. It's always best to consult a professional heating engineer when considering a new boiler, as they can provide expert advice and guidance based on your specific needs and circumstances.

New Boiler Costs

Boilers can be a daunting purchase for many people as they’re an appliance with a lot of responsibility, providing heat for you and your family is something you want to get right. Boilers aren’t exactly a quickly disposable item either, potentially lasting you a decade.

Boiler costs can be split into two segments: the first is the actual boiler itself (unit price), and the second is the cost of the boiler being installed (set up) in your property by an expert engineer. 

Here at iHeat, we want to remove all of this undue stress and make the decision making process of upgrading to a new central heating system, as easy as possible.

Boiler costs can vary depending on a number of factors including their brand, model, fuel, output, warranty, labour and installation type. Typically a new boiler will cost between £1,845 and £3,500, below is a list of average boiler installations offered by iHeat.

Installation Type

Price (inc VAT)

Combi to combi swap


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System to combi conversion


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New boiler install


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Back boiler to a combi


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System to system


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Some location factors that can influence the price of your new boiler

You will be given a specific quote from the boiler installation company based on:

  • The type of home you have (i.e. terraced, semi-detached, etc.)

  • How many bedrooms you have

  • How many bathrooms you have

  • Your postcode and specific location

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Frequently Asked Questions

How much does it cost to get your boiler serviced?

The cost of having your boiler serviced varies depending on factors such as your location and the type of boiler you have. Generally, the price ranges between £50 and £100. To get an accurate quote, it's best to contact a qualified engineer in your area.

How often should a boiler be serviced?

Boilers should be serviced at least once a year, regardless of their age. Ensuring that your boiler is serviced annually can help keep it running efficiently and safely, as well as maintaining its warranty.

What should a boiler service include?

A comprehensive boiler service should include an inspection and assessment of the boiler's external and internal components, a gas pressure check, flue analysis, ventilation checks, controls and safety devices inspections, and overall system performance testing. The engineer should also clean any parts that need it and provide recommendations for additional maintenance or repairs.

Can you use a new boiler straight away?

Yes, once a new boiler is properly installed, you can begin using it right away. However, it's essential to read the manufacturer's instructions carefully and follow their recommended practices for proper use, safety, and maintenance.

Is boiler warranty void if not serviced?

Many manufacturers require an annual boiler service as a condition of their warranty. Failing to service your boiler annually might result in your warranty being void. Always check the manufacturer's specific terms and conditions to stay within the required guidelines.

Is it worth servicing a new boiler?

Absolutely; servicing a new boiler after its first year and annually thereafter is critical. Regular servicing will maintain the boiler's efficiency, safety, and longevity, plus it's often a requirement to keep the manufacturer's warranty valid.

Is it essential to have an annual gas boiler service?

While not a legal requirement in the UK, having an annual gas boiler service is highly recommended. Doing so ensures that your boiler is running safely and efficiently, minimises potential breakdowns, and helps fulfil the warranty conditions provided by the manufacturer.

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Article by
Stephen Day | Co-founder
Gas Safe registered and FGAS certified engineer with over 20 years experience in the heating and cooling industry.