Boiler repair in Belfast
Gas combi or oil burner, see typical Belfast repair costs and book a qualified engineer who works on your fuel.
What goes wrong with Belfast boilers
Belfast has a mix of gas combis in terraces and apartments and oil boilers in many suburban homes, so the faults vary. Gas boilers tend to lose pressure or suffer from worn diverter valves. Oil boilers more often fail to light because of a blocked nozzle, a dirty filter or a problem with the burner. Tell us which fuel you use and we will find the right engineer.
Victorian and Edwardian red-brick terraces: Homes converted from oil to gas, or from an old back boiler, often carry sludge in the original pipes, which shows up as cold radiators and noisy pumps.
Suburban semis: Many still run oil boilers with an outdoor tank, where nozzle, burner and fuel-line faults are common. Gas semis tend to see valve and pump wear.
Apartments in the city centre and riverside: Combis in flats most often lose pressure or develop diverter valve faults that leave you with heating but no hot water.
Boiler repair prices in Belfast
| Job | Typical price | Typical visit |
|---|---|---|
| Diagnostic visit | £80 to £120 | about 1 hour |
| Pump, valve or fan replacement | £150 to £350 | 1 to 3 hours |
| Main circuit board (PCB) | £250 to £450 | 2 to 3 hours |
| Annual boiler service | £80 to £120 | about 1 hour |
Typical prices including VAT, checked October 2026. Your installer gives you a fixed price in writing before any work starts. More detail in our boiler repair cost guide.
Boiler over 12 years old?
Repeat repairs on an old boiler add up. Compare a fixed replacement price in Belfast before you pay for another part.
See boiler replacement optionsAreas we cover around Belfast
- Ormeau
- Stranmillis
- Malone
- Ballyhackamore
- Sydenham
- Andersonstown
- Newtownabbey
- Holywood
- Dundonald
- Carryduff
Boiler repair in Belfast: questions
How much is a boiler repair in Belfast?
A diagnostic call-out generally costs £80 to £120. Common replacement parts such as a pump, fan or valve run to £150 to £350 fitted, and a main control board £250 to £450. The engineer gives you the price before carrying out the repair.
My oil boiler will not fire. What should I check?
First check there is oil in the tank and that the gauge is not stuck. Look for a reset button on the burner and press it once only. If it locks out again, stop and call an engineer, as repeated resets can flood the burner.
When is a new boiler better than a repair?
If the boiler is under 10 years old and one part has gone, repair it. If it is over 12 years old, breaks down often or needs parts that are hard to source, a replacement usually costs less in the long run.
What do I do if I smell gas?
Open doors and windows, leave the building and do not operate switches. Call the Northern Ireland Gas Emergency Service on 0800 002 001. Wait until they have made everything safe before booking a repair.