Oil Boiler Servicing
Comprehensive annual service including combustion chamber cleaning, nozzle replacement, and electronic analyser testing. NAT GAS & LPG catered for.
Gas Safe & OFTEC Registered Engineers
Boiler Installation, Repair & Servicing — Winchester, Hampshire & Surrounding Counties
Trusted local heating engineers with decades of experience. Fair prices, tidy work, and a team you can rely on — Mon–Fri 9am–6pm, emergency cover Saturdays.
Free no-obligation quotes
Breakdowns within 24 hours
Mon–Fri 9am–6pm, emergency Saturdays
Our Heating Services
From annual servicing to full system installations — we cover everything your home's heating system needs.
Gas Boiler Servicing
Combi and system boiler servicing. Flue and ventilation checks, carbon monoxide detector advice, and full safety inspection.
Boiler Installation
Full gas and oil boiler replacement service. Worcester Accredited Installer — quality and manufacturer warranty guaranteed.
Oil Tank Removal
Full removal and replacement of oil storage tanks. Bunded tanks where required. All sitings comply with OFTEC regulations.
Landlord Certificates
Competitively priced annual gas safety certificates. Includes boiler, fire or hob servicing. Covers up to two appliances.
Power Flushing
Removes sludge and debris from your heating system. Extends boiler life, reduces noise, and improves efficiency. Biodegradable chemicals used.
Magnetic Fuel Savers
Aligns fuel ions for a hotter, more efficient burn. Reduces fuel bills and emissions. No pipework cutting needed. 12-month money-back guarantee.
Underfloor Heating
Installation and servicing of wet underfloor heating systems for new builds and retrofits. Energy-efficient comfort throughout.
30+
Years of experience
Mon–Fri
9am–6pm, emergency Saturdays
24h
Breakdown response
4
Industry accreditations
What Our Customers Say
Disaster struck when our boiler packed up in the cold spell. A friend recommended John who came round and had a look. The work was carried out to an excellent standard. He was a very nice man — I would highly recommend him.
Google Review
Excellent, prompt, friendly and efficient service. We have been using John and Ben for several years and they have never let us down.
Google Review
John and Ben did an excellent job replacing our old boiler — very neat and tidy and quick. Reasonably priced. Highly recommend.
Google Review
John and his team have been great every time we have called on them. Excellent service.
Google Review
John has been helping us at our property for years. Highly recommended. Trustworthy, reliable, good communication.
Google Review
John and his team did an excellent job replacing my boiler and radiators — very clean and tidy and reasonably priced. Highly recommend.
Google Review
John and Ben have done a number of jobs for us — servicing, repairs, fitting a new radiator, fixing a leak. Always quick, knowledgeable, polite and reasonably priced. Won't use anyone else now.
Google Review
We have been a client of John at Heatsource for the past 7 years. His client service and quiet professional manner is second to none. Last winter our heating went down on a Saturday evening — he came back quickly and was there Sunday morning without hesitation.
Google Review
Always there when he says he will be, or lets you know. Excellent service, very clean worker, no mess left when finished. Reasonable rates.
Google Review
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Ready to Book a Service or Get a Quote?
Call us today — we offer free, no-obligation quotes and respond to breakdowns within 24 hours. Mon–Fri 9am–6pm, emergency cover Saturdays.