James 
Your Baxi boiler is making hot water fine, but the radiators are staying cold, that’s frustrating, especially in winter. Below are the real causes I see in UK homes all the time. 1) Diverter valve stuck (very common on combi boilers) Is this your problem? You get perfectly hot taps and showers.The boiler fires up.But … Read more
The flush is weak and doesn’t clear the bowl properly Is this your problem? What to do First, lift the cistern lid carefully and place it somewhere safe. Check the water level inside the cistern. In most UK toilets, the water should sit about 1 inch (2–3cm) below the overflow pipe. If the level is … Read more
The handle moves, but the toilet barely flushes or not at all. Is this your problem? What to do Safe DIY: Yes.Stop and call a professional: If the flush lever feels stiff or loose inside the handle mechanism. Water runs constantly into the bowl after flushing. Is this your problem? What to do Safe DIY: … 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 kitchen sink is backing up, but the bathroom drains are fine — that’s a very common UK plumbing problem and it’s usually local to the kitchen line. Water rises in the kitchen sink when you run the tap or washing machine.Bathroom sink, bath, and toilet all drain normally. If it’s the other way round … Read more
You’re noticing the toilet water level drop overnight and you want a clear, safe fix before it turns into a bigger problem. The water level in the toilet bowl is normal at night but noticeably lower by morning. Is this your problem? What to do The bowl water slowly lowers and you sometimes smell drains … Read more