Smell gas? Turn off the gas at the meter, open windows, do not use switches and call the National Gas Emergency Service on 0800 111 999.Smell gas? Call 0800 111 999

Boiler troubleshooting guides

Step-by-step help for the problems that do not always show a fault code, from low pressure to leaks and cold radiators.

Boiler Pressure Too High? Causes and How to Lower It Safely Why boiler pressure climbs too high, how to bring it down by bleeding a radiator and when to call an engineer 5 min read Boiler Pressure Too Low? How to Repressurise a Combi Boiler Top up a combi with the filling loop to 1 to 1.5 bar and find out why the pressure keeps dropping 6 min read Frozen Condensate Pipe: How to Spot It, Thaw It and Stop It Spot a frozen condensate pipe, thaw it safely with warm water and stop it freezing again 5 min read Boiler Leaking Water: Causes, What to Do Now and Repair Costs What to do when a boiler leaks, where the water comes from and what the repair is likely to cost 4 min read Boiler Service Cost in the UK: Prices and What Is Included Typical UK boiler service prices, what the engineer checks and why an annual service matters 4 min read No Hot Water but Heating Works: Combi Boiler Causes and Fixes Why a combi heats the radiators but not the taps, the checks to try and typical repair costs 5 min read