Boiler installation, repair & servicing
in Winchester
Trusted Local Heating Engineers Since 2003
Trusted company with 700+ reviews on
LW Gas Ltd provides expert boiler installation, repair, and servicing throughout Winchester and surrounding villages. As a family-run business with over 20 years of experience, we serve homes across Winchester city centre, Kings Worthy, Twyford, Otterbourne, Compton, and Hursley — from cathedral-view flats to rural countryside properties.
Signs you may need a new boiler.
Is your boiler over 10 years old?
Older boilers lose efficiency over time, increasing energy bills and reducing reliability. A modern A-rated replacement can significantly cut running costs.
Is your boiler starting to become inefficient?
If your home is taking longer to warm up or your bills are creeping up, your boiler may be losing efficiency. Modern condensing boilers run at over 90% efficiency.
Worried about costly repairs?
Recurring repair costs add up quickly. New Worcester Bosch boilers come with up to a 12-year guarantee, giving you long-term peace of mind.
Boiler installation in Winchester
We supply and install all types of boilers for Winchester homes of every size and age — from modern new-builds to older period properties in the city centre.
Combi boilers
System boilers
Regular (conventional) boilers
Our Installation Process
We make installing a new boiler in Winchester simple and stress-free from start to finish.
Our process includes:
- Home survey – We assess your current system, property layout, and heating needs at no obligation.
- System recommendation – We suggest the best boiler and controls for your Winchester home and budget.
- Clear quotation – Straightforward pricing with no hidden costs before any work begins.
- Professional installation – Carried out efficiently by our qualified Gas Safe engineers with minimal disruption.
- Full handover – We walk you through your new system before we leave and register your warranty.
Brands we install, service & repair:
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Spread the cost of your new boiler with flexible finance options in Winchster.
With low deposits and affordable monthly payments, upgrading your heating system is easier without a large upfront expense.
- Low deposit options available
- Fixed monthly payments
- Quick and simple application process
- High-efficiency boilers that can help reduce energy bills
For a manageable monthly payment, you can enjoy a modern, energy-efficient heating system installed by our Gas Safe registered engineers.
Boiler Repairs in Winchester
If your boiler isn’t working properly, our experienced engineers provide fast, reliable boiler repairs in Winchester for all major systems, including gas, oil and LPG boilers.
We regularly fix:
- No heating or hot water
- Boiler breakdowns and fault codes
- Low pressure, leaks or frozen pipes
- Unusual noises or performance issues
Our aim is to diagnose and repair your boiler quickly, restoring your heating and hot water with minimal disruption.
Boiler Servicing in Winchester
Regular boiler servicing helps keep your system safe, efficient and reliable all year round.
Our boiler service in Winchester includes:
- Full safety and performance checks
- Cleaning of key components
- Early identification of potential faults
- Ensuring your warranty remains valid
We recommend an annual boiler service to maintain efficiency, reduce energy costs, and help prevent unexpected breakdowns.
Central heating & radiator services in Winchester
Power flushing
Removes sludge and debris from your system, restoring heat output and reducing energy bills. Recommended when radiators are cold at the bottom.
Radiator installation & upgrades
New radiators, thermostatic radiator valves (TRVs), and smart TRV upgrades to improve comfort and zonal control.
Magnetic filter installation
Protects your boiler and system from debris. We install and service MagnaClean and equivalent filters to extend system life.
Smart heating controls in Winchester
Upgrade your Winchester home with intelligent heating controls that let you manage temperature, schedules, and energy use from your phone. Our smart thermostat installations include Nest, Hive, and Worcester Bosch Wave — perfect for busy households and period homes alike.
Smart TRVs allow room-by-room zonal control, improving comfort and reducing energy waste throughout your home.
Unvented hot water cylinders in Winchester
We install, service, and repair unvented cylinders (including Megaflo) for Winchester homes requiring high-pressure hot water. Our engineers are G3-qualified and can advise on whether an unvented system is right for your property.
Boiler Care Plans in Winchester
Protect your heating investment with one of our tailored care plans, available for homeowners and landlords running gas, oil, or LPG systems.
- Annual boiler service included
- Priority response for breakdowns
- Ongoing support from experienced engineers
- Fixed monthly payments – no surprise bills
The LW Gas Difference
Winchester residents choose us for all their boiler, heating, and related plumbing requirements because of our uncompromising standards and personalised approach. Our fully accredited heating engineers bring specialist knowledge to every Winchester home they visit. Our fully accredited heating engineers bring specialist knowledge to every home they visit.
Affordable Payment Plans
Make your heating upgrade more manageable with our range of flexible finance options. Customised payment solutions are designed to work with your household budget.
Worcester Bosch Accredited Installers
As official Worcester Bosch accredited installers, we provide extended warranties and certified expertise with these industry-leading boilers.
Customer Satisfaction
Our top priority is your comfort
and satisfaction
Comprehensive Care Packages
Safeguard your heating investment with our tailored care plans. Includes scheduled maintenance visits, preferential response times and component coverage for complete reassurance.
Our Installers Work Across Winchester
Winchester city centre – Kings Worthy – Twyford – Otterbourne – Compton – Hursley – Colden Common – Sparsholt – Littleton – Sutton Scotney – Owlesbury – Itchen Abbas
Winchester - Historic Architecture, Modern Heating Solutions
Winchester’s distinctive blend of medieval buildings, Georgian townhouses and contemporary homes presents unique heating challenges. Our Hampshire-based engineers understand the specific requirements of local properties, from cathedral-view flats to countryside cottages in surrounding villages like Kings Worthy and Twyford.
Smart Heating Innovation
Transform your home with cutting-edge heating technology. Our smart control installations allow precise temperature management, schedule optimisation and remote access – perfect for the busy lifestyle while preserving the character of your home.
Frequently Asked Questions
Here is our frequently asked questions, find answers below or get in touch.
The cost of a new boiler in Winchester typically ranges from £1,500 to £3,500 installed, depending on the type of boiler, your property size, and whether pipework changes are needed. We provide free, no-obligation quotes tailored to your home.
If your boiler is leaking, turn off the boiler and the water supply stopcock if possible, and call us as soon as you can. Leaks can indicate a failing pressure relief valve, corroded pipework, or a pump seal issue. Our engineers will diagnose and repair the fault quickly.
Repeatedly low boiler pressure is usually caused by a small leak somewhere in the system, a faulty pressure relief valve, or air in the system. While you can repressurise it yourself short-term, recurring pressure loss needs a professional diagnosis to find the underlying cause.
Common causes include a tripped boiler, a frozen condensate pipe (in cold weather), low system pressure, a faulty diverter valve, or a thermostat issue. Our engineers can usually diagnose and fix this on the same visit.
We recommend an annual boiler service, ideally in late summer or early autumn before the heating season begins. Annual servicing keeps your boiler safe, efficient, and valid for most manufacturer warranties.
A straightforward like-for-like combi boiler swap in Winchester typically takes one day. Conversions from a conventional to a combi system, or installations requiring new pipework, may take one to two days.
A power flush cleans sludge, rust, and debris from your central heating system using high-velocity water and chemical cleaners. You may need one if radiators have cold spots, particularly at the bottom, if your system is noisy, or when fitting a new boiler to an older system.
Yes — we install a range of smart thermostats including Nest, Hive, and Worcester Bosch Wave, as well as smart TRVs for room-by-room control. These can be retrofitted to most existing heating systems.
We install and service all major brands including Worcester Bosch, Vaillant, Baxi, Ideal, Glow-Worm, Viessmann, and Grant. As Worcester Bosch accredited installers, we can offer extended manufacturer warranties on Worcester products.
Yes. We offer prompt response for boiler breakdowns across Winchester and surrounding villages. Call our Winchester office on 02380 693233 to discuss your situation and arrange attendance.