BOILER SERVICING & REPAIR

Why Choose Harrison Heating Services for Your Boiler Care?

At Harrison Heating Services, we take pride in being your trusted partner for all boiler servicing and repair needs. We know that a reliable boiler is at the heart of a comfortable home, especially during colder months. Whether you need a routine check-up, a major repair, or emergency assistance, our certified and highly skilled technicians are here to help.

We don’t just service boilers; we deliver peace of mind. With our focus on safety, efficiency, and long-term reliability, you can rest assured that your home’s heating system is in good hands. Regular boiler care isn’t just about avoiding breakdowns – it’s about making sure you’re warm, comfortable, and saving money in the long run.

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Boiler Services We Offer

  • Comprehensive Inspections

    Our detailed, step-by-step boiler inspections involve checking all critical components, including pressure levels, heat exchangers, burners, and safety devices. We identify minor faults early, preventing them from turning into costly problems later. Our thorough reports keep you informed about the current health of your system.

  • Efficient Repairs

    A broken boiler can be a nightmare, especially in winter. That’s why our repair services are designed to get you up and running as quickly as possible. Whether it’s a faulty valve, leaking pipe, or a complete system issue, our technicians use advanced tools and genuine parts to ensure long-lasting results.

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  • Preventive Maintenance

    Preventive care is the secret to a boiler that stands the test of time. During our maintenance visits, we clean and calibrate the system, inspect for leaks, and check for signs of wear and tear. This proactive approach minimizes the chance of a breakdown and improves energy efficiency, helping you save on your monthly bills.

  • Emergency Services

    Unexpected boiler breakdowns can happen at the worst times. That’s why we offer emergency repair services when you need us most. Our rapid response team is available to restore comfort to your home quickly and efficiently. Day or night, we’re here for you.

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Why Regular Boiler Maintenance Matters

Neglecting your boiler can cause more than just inconvenience. It can lead to significant safety risks, higher utility bills, and even expensive system failures. Here’s why scheduling regular boiler maintenance is essential:

  • Prolongs System Life: Like any machine, boilers need regular care to run at their best. Routine servicing can extend your boiler’s life by several years, saving you the cost of premature replacement.
  • Improves Efficiency: Over time, boilers accumulate dirt and debris that reduce their efficiency. Our servicing ensures the system runs smoothly, helping you save money on energy bills.
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  • Reduces Breakdowns: Small issues like worn-out seals or faulty sensors can escalate if left unchecked. Preventive maintenance catches these problems early, reducing the risk of costly repairs.
  • Ensures Safety: Faulty boilers can pose risks, such as carbon monoxide leaks. Our technicians perform rigorous safety checks to ensure your system operates safely and effectively.
  • Environmental Benefits: A well-maintained boiler uses less fuel, reducing your carbon footprint and helping you do your part for the environment.
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Signs Your Boiler Needs Servicing or Repair

Not sure when to call for boiler servicing? Here are some telltale signs:

  • Strange noises such as banging, whistling, or gurgling sounds.
  • Inconsistent heating or hot water.
  • Higher-than-usual energy bills.
  • Boiler turning on and off frequently.
  • Leaks or unusual smells around the unit.

If you notice any of these issues, don’t wait for them to worsen. A quick inspection could save you money and hassle in the long run.

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Why Homeowners Trust Harrison Heating Services

  • Experienced Technicians: All our engineers are fully trained, licensed, and up-to-date with the latest industry standards.
  • Customer-Centric Service: We treat every home as if it were our own. We prioritize cleanliness, professionalism, and clear communication.
  • Transparent Pricing: No hidden costs, no surprises. We provide upfront quotes so you know exactly what to expect.
  • Reliable and Fast: Our technicians are punctual and work efficiently to minimize disruption to your daily routine.
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We work with all common boiler types and fuel systems, including:

  • Gas boilers
  • LPG boilers
  • Oil-fired boilers
  • Combi boilers
  • System boilers
  • Regular (conventional) boilers

All work is carried out by Gas Safe registered engineers, fully compliant with UK regulations.

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Boiler Servicing – What’s Included

A standard boiler service from Harrison Heating includes a full safety and performance inspection:

  • Visual inspection of the boiler and components
  • Safety checks and gas tightness testing
  • Flue and combustion analysis
  • Carbon monoxide and emissions checks
  • Cleaning of key internal components (where applicable)
  • Pressure and expansion vessel checks
  • Controls and thermostat testing
  • Identification of wear or potential faults
  • Service record and clear feedback for the client

Regular servicing helps extend boiler lifespan, maintain efficiency and reduce the risk of unexpected failures.

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Boiler Repairs & Fault Diagnosis

If your boiler is not working correctly, we provide fast and reliable fault diagnosis and repair.

We repair issues such as:

  • Boiler not heating or providing hot water
  • Low pressure or recurring pressure loss
  • Strange noises or vibration
  • Error codes and ignition faults
  • Leaks or component failures
  • Thermostat and control issues

Where possible, we aim for first-visit repairs. If additional parts are required, we provide clear advice and transparent pricing before proceeding.

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Emergency & Same-Day Boiler Repairs

We understand that boiler breakdowns can be urgent, especially in colder months.

Where availability allows, we offer:

  • Emergency call-outs
  • Same-day repairs
  • Priority response for vulnerable customers and essential buildings

Our goal is to restore heating and hot water as quickly and safely as possible.

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Boiler Servicing for Landlords & Commercial Properties

We work with:

  • Private landlords
  • Letting agents
  • Commercial premises
  • Churches and community buildings

Services include:

  • Routine boiler servicing
  • Safety checks and compliance support
  • Clear service documentation
  • Planned maintenance arrangements

We understand the importance of reliable heating in public and commercial spaces, including places of worship where comfort and safety are critical.

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Why Regular Boiler Servicing Matters

Regular boiler servicing helps:

  • Improve safety and reduce carbon monoxide risk
  • Maintain efficiency and lower energy bills
  • Reduce breakdowns and costly repairs
  • Keep warranties valid
  • Ensure compliance with UK regulations

Annual servicing is strongly recommended for all boiler systems.

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Why Choose Harrison Heating?

  • Gas Safe registered engineers
  • Experience with all boiler types and fuel systems
  • Domestic, landlord, commercial and church clients
  • Honest diagnosis and clear advice
  • Emergency and same-day repair options
  • Local, trusted service in Southampton and surrounding areas

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Get in touch today to book your boiler service or repair.

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Book a Boiler Service or Repair in Southampton


Don’t let a faulty boiler disrupt your comfort. Whether you’re due for regular maintenance, need a quick repair, or want an expert opinion, Harrison Heating Services is here to help.

Call us today to schedule your appointment and experience the difference of working with true professionals. Your home deserves the best – and so do you.

Frequently Asked Questions

If this happens, it might be a result of low pressure or blockage in the system, which is restricting the flow of water. In some cases, there could be a fault with a closed valve, thermostat or aa pump causing the water not to circulate properly. We recommend contacting us for assistance in diagnosing and repairing the fault by a Gas Safe registered engineer.
The most common causes of leaks and boiler dripping water are faulty internal components, this includes but is not limited to issues with corrosion, broken pressure valves, pump seals, or loosen pipe connections. We recommend calling out our Gas Safe registered engineer, who will diagnose and fix the problem for you and stop any potential dangers. You should never try to fix a boiler yourself, always call out for professional help.
Kettling sound from your boiler ( similar to a boiling kettle ) is usually caused by limescale or sludge buildup inside the system. It often happens in areas with hard water. The deposits build up in your boiler or pipes can block or restrict the flow of water inside the system, which can result in overheating and weird noise. It is best to treat this as soon as possible because it might result in more severe boiler damage and higher costs if your boiler needs replacing. We recommended calling our team as soon as you notice kettling sounds from your boiler. Our engineer will drain your central heating system and remove limescale and sludge buildup. For more information on this method, please visit our Power Flush section.
Worrying noises from the boiler are usually caused by low water pressure, a faulty pump or air buildup in the system. The type of sound in your system can narrow down the source of the problem. Banging noise could be a result of imminent pump failure, and this happens most often in old systems that have not been serviced regularly. We highly recommend contacting us to book our Gas Safe registered engineer for a professional diagnose of the problem as soon as possible.
The blue flame that always stays lit is called a pilot light. If this pilot light keeps turning off, it will stop your boiler from working. It can be caused by a broken thermocouple, which would stop the supply of gas to your boiler. Sometimes also the problem could be a draught blowing the pilot light out or a deposit built up in the pilot light. Always remember that you should never carry out any work on your central heating system. There is one thing that you could check yourself before calling out an engineer: Check if your other gas appliances are working and that your gas stopcock is on. You can always give us a call, and we will be more than happy to help you.
The most common causes for this to happen are faulty airlocks, diaphragms, motorised valves, thermostat or low level of water in the system. Your heating system might require a new part fitted to be working correctly again. Give us a call today for professional advice. If necessary, we will book a Gas Safe registered engineer for a professional diagnose of the problem as soon as possible.
It is straightforward to check the pressure of your central heating system; just take a look at the pressure gauge on your boiler. Low pressure ( below 1 ) will cause your central heating system not to work properly. It can be a result of a few potential reasons. Some of the reasons for this to happen could be a water leak in the system, recently bled radiators or a faulty pressure relief valve. We recommend contacting us for assistance.
All condensing boilers ( combi, system or regular ) have a condensate pipe transporting excess water away from the boiler. During winter it is common for the water to freeze and cause a blockage. If this happens, your boiler will most probably display a warning or a fault code. Feel free to give us a call; we will be happy to assist.
It might be a sign of a faulty thermostat when the heating is turning on and off when it is not supposed to. If your thermostat starts to malfunction or loses its accuracy, it will probably need to be replaced. Give us a call today for professional advice.
If some of your radiators are not getting hot, then they might need balancing. This procedure can also be done without the help of an engineer, but only if you feel confident doing it. If only the bottom of your radiator is getting hot then it might need to be bled, it is not a difficult task, and it does not require an engineer. In some other cases, there could be a build-up of sludge or air in your central heating system. Our professional engineers can remove this build-up by a process called Power Flush, and this is something that you should not try yourself.
All of our installers are fully trained, and qualified Gas Safe registered professionals.
We will recommend the best possible boiler for your needs, in terms of brands we mostly recommend Valliant and Worcester Bosch.
Harrison Heating has a team of professional engineers covering all of Hampshire. Most of our work so far has been carried out in the following areas: Southampton, Eastleigh, Fareham, Chandlers Ford, Whiteley, Winchester, Portsmouth, Winchester, Hedge End, West End, Botley, Romsey, Totton, Lyndhurst, New Forest, Hythe, Marchwood, Netley, Gosport, Twyford, Hamble, Holbury, Wickham, Titchfield, Nursling, Ringwood, Salisbury, Cosham, Waterlooville, Fair Oak and Lee-on-the-Solent.
Yes, we provide free quotes without obligation from your side to accept our quotation.
To give you the best and optimal solution we will need to know few details. For example, we will ask how many rooms and bathrooms you have currently or if you are planning any future extensions of your house.
In most cases, we can install your new boiler in the next working day. It depends on the current workload, so please give us a call as soon as possible if you are in a rush.
It usually takes one day to fit a new boiler by our professional installation team.
It is required by law that all servicing and gas safety checks are made by a Gas Safe registered engineer. It is also a condition of the warranty if your boiler is still under one.
We will do all possible safety checks, inspection and test all critical components to make sure your boiler runs safely, reliably and efficiently.
Please feel free to use our website to leave us a short feedback message. We are always happy to hear from customers about the outcome of our work. You can also read other customers reviews in the feedback section of our website.
Underfloor heating can be installed in most houses under almost any type of flooring. It gives you the option to have different zones heated and controlled independently. It comes very convenient in terms of managing heat distribution depend on which rooms are being used at the time.
Of course, you can! It is even recommended if the room is big enough, the area of heating can be split into sections. This approach works great with open-plan areas like kitchen diners.
Underfloor heating gives you the ability to warm up naturally cold ceramic or stone floors efficiently. It distributes the heat throughout the heated areas more equally compared to the radiators. Once installed, the underfloor heating requires less maintenance compared to central heating.
The underfloor heating gives you more control, increased comfort, better heat distribution, and it costs less to run. Underfloor heating provides a cleaner radiant heat causing less discomfort to asthma and dust allergies sufferers.