A high-pitched whistling or “kettle” noise when the heating is on Is this your problem? What to do This is often kettling , limescale or sludge build-up inside the heat exchanger. Safe DIY: Stop and call a Gas Safe engineer if: Whistling only when hot water tap is running Is this your problem? What to … Read more
Your boiler is making a humming or buzzing noise, and it’s worrying you — that sound isn’t normal and it needs checking calmly. A low, steady humming when the boiler is running, especially during heating or hot water. Is this your problem? What to do Safe DIY? Yes.Stop and call a pro if: The noise … Read more
Your heating’s on, most radiators are hot, but one stays stubbornly cold — a very common UK problem. One radiator completely cold while all others heat normally Is this your problem? What to do Safe DIY. No tools needed. Stop and call a professional only if the valve won’t turn at all. Radiator warm at … Read more
Your radiator is heating unevenly — hot at the top, cold at the bottom, and the room just won’t warm up properly. Radiator hot at the top, stone cold along the bottom half. Is this your problem? What to do DIY or call a pro?This is professional-only. Running the system like this strains the boiler … Read more
Your boiler keeps turning on and off and you need it to stop now, not after guesswork. Boiler fires for 10–60 seconds, shuts off, then restarts again and again. Is this your problem? What to do Safe DIY. Stop if pressure won’t hold. Call an engineer. Radiators warm at the bottom but cold at the … Read more
Your boiler pressure is dropping overnight, leaving you with low pressure or no heating in the morning. Pressure drops to zero or below 1 bar by morning Is this your problem? What to do • Check the pressure gauge when the boiler is cold (first thing in the morning).• Normal cold pressure in the UK … Read more
Your boiler is making hot water, but the radiators stay cold, that’s a very common and very fixable UK heating problem. Is this your problem? Hot taps work fine, but none of the radiators heat up. What to do • Check the boiler display and make sure heating is switched on, not hot-water-only.• Turn the … Read more
Your boiler pressure is reading too high and you’re worried something’s going to fail or leak. Is this your problem? The pressure gauge is above 2.5–3 bar when the heating is on, or stays high even when cold. What to do Is this your problem? Pressure rises every time the heating comes on, then drops … Read more