Boiler Repairs
A boiler repair is work to get heat or hot water back after a fault — not the same as an annual service. Any work on a gas appliance in the UK must be done by a Gas Safe registered engineer. If you can smell gas, hear a leak, or a carbon monoxide alarm is sounding, leave the property and call the National Gas Emergency Service on 0800 111 999. For the longer decision — manufacturer cap versus a local engineer, and when replacement wins — see boiler repair.
What you can check first
These checks do not involve opening the gas appliance. If any of them restore heat, you may not need a call-out.
- Confirm the programmer or thermostat is calling for heat, and that TRVs on radiators are open.
- Look at the boiler display. A lockout or fault code is useful for the engineer — see our fault codes A–Z.
- Check system pressure on a sealed system. Many combis want about 1–1.5 bar when cold. Filling loops are usually on the underside of the boiler; if you are not sure, leave it. Guide: boiler pressure.
- Use the manufacturer reset only as the instructions describe. Repeated resets without a repair can mask a real fault.
- Frozen condensate pipes are common in cold weather. Thawing from the outside with warm water is a homeowner job; do not use boiling water on plastic pipe.
When to call an engineer
Call a Gas Safe engineer if there is no heat or hot water after those checks, a persistent fault code, a leak from the boiler, ignition failure, or you are not confident topping up pressure. Same-day attendance matters most in winter, for vulnerable occupants, or where a leak is causing damage.
A repair is not a substitute for a service. A well installed, set-up, and serviced boiler fails less often. If the appliance is old, beyond economical repair, or still under manufacturer warranty, say so when you book — warranty work often has to go through the maker, not a third-party call-out. Out of guarantee, several makers sell a one-off fixed-price repair that can beat a multi-part independent quote.