Boiler Breakdown Callouts in Blunsdon

Give me your full postcode, whether it starts SN25 or SN26, plus the name of your road. Blunsdon straddles both, and the full code tells me exactly where you are. I cover the whole area, including Haydon Wick and Stratton St Margaret on either side.

On a system or regular boiler, that often points to a motorised zone valve that has stuck, a cylinder thermostat fault, or a programmer that isn't calling for hot water. Check the hot water is set to on at the programmer. If it is and the cylinder stays cold, call me.

Some boilers use flashing lights instead of codes, and the pattern or colour tells an engineer what has happened. Check the manual, or the manufacturer's website, for your model. Note which lights are flashing and how, then call me and describe them. Don't remove the casing to look further.

Most modern boilers run the fan first to clear the combustion chamber before lighting. If you hear the fan but the boiler never fires, the fault may be with the fan pressure switch, the ignition, the gas valve or the flue. Note any code shown and call me rather than letting it keep trying.

Yes. If the flue outlet is blocked, for example by a nest, leaves or something stored against the wall, the boiler can lock out to protect you. Don't try to clear anything from the flue yourself. Tell me what you can see when you call, and if a carbon monoxide alarm sounds, get outside and call 0800 111 999.

Possibly not. Underfloor heating usually has its own manifold, pump and controls alongside the boiler, so if only the floor is cold and the radiators work, the fault may be in that circuit. Tell me exactly what is cold and what still works when you call.

Diagnosis generally starts with what has been happening, then the boiler's codes and readings, then testing to find the cause. Once the cause is known, ask about anything you're unsure of, including whether a part needs ordering, and the decision on the repair is yours.

A gas smell anywhere should be reported to the National Gas Emergency Service on 0800 111 999 first. They deal with leaks on the supply and the meter. Don't operate electrical switches nearby. Once they have made it safe, if your boiler then needs attention, call me.

Noise only during hot water use on a combi can point to scale in the plate heat exchanger, restricted water flow or a pump issue. It often gets worse over time and can lead to the boiler cutting out. Tell me whether it is a whistle, a bang or a hum when you call.

Yes, if you have them. Service records show when the boiler was last checked, any parts replaced and any warnings noted, and that history can help point to the cause. If you don't have any records, that's not a problem, so get in touch anyway.