If you need to find a tradesperson to get your job done, please try our local search below, If your boiler pressure levels are over 30 psi (pounds per square inch), your pressure relief valve is letting out steam as a safety measure. Discuss Evil combi boiler, hot water cutting out in the Central Heating Forum area at PlumbersForums.net, Reply to Evil combi boiler, hot water cutting out in the Central Heating Forum area at PlumbersForums.net, Welcome to PlumbersForums.net - The international free. Sorry, I know nothing!! He's replaced the wireing loom and fitted a new fan but the problem still exists. you could try running at 160-165F and see if that works? }); Need help replacing my kitchen tap please. The pilot light doesn't go off; it's as if a safety valve had kicked in to say the water was too hot and turned it off, but the thermostat is set at a safe temperature. UFH single zone and radiators with single thermostat and open Therm vs multi zone with. As a pump is used to move water around the central heating system, if it is not working properly, then hot water could just stay in the boiler rather than be moved around the system. A noisy boiler is often caused by “Kettling”, which is a build up … It may not display this or other websites correctly. The boiler is supposed to self diagnose if there's something not working - if it's sensor is broken would it know, or would it assume it was ok and think it was overheating therefore cut out? A leak coming from your boiler is never a good sign. I noticed the water pressure it at 0.5 when the boiler is in use and not in use. If a boiler has reached 220°F, a sudden drop in pressure could cause the tank to burst. Overheating also is the main cause of leaking. When the water temperature in the boiler becomes too high, it increases the water pressure throughout the system. Why does the hot water from my Biasi boiler run hot for a little while, then the pilot cuts out and the water runs cold, then the pilot re-ignites and warm water returns. We have to reset on … A test was recently completed on the boiler and results showed a 98% performance rating. You can sonic clean them or replace it. The pilot is only lit for a minute or so. } else { This combi boiler shows it is on (there is demand for heat from it) but the hot water tap only receives brief spells of luke warm water. i think i will have to update my prices!! The hot water cylinder will not be empty, and even if it was the coil through it is just a pipe carrying the hot water into and out of the cylinder which wont get any hotter than the rad`s. Hi, I hope somebody can give me a clue, although I stress I have no intention of trying to fiddle with the boiler myself! This can trigger your boiler to cut out. Looking for a Heating Engineer? $('#local-search-submit').click(function() { hi i have a alpha cb24x combi boiler and its working the hot water but cuts out on the central heating iv replaced the pump and the temperature senser( thermister) at the side of the combuston chamber and also the dhw valve senser the one thats shaped like a horse shoe im running out of ideas now please help as the weather is getting cold now thanx Our VOKERA Compact HE Combi Boiler seems to cut out when running hot water from our bathroom. the problem started when i drained the system to replace a washing machine tap that was leaking.i do remember a gluging sound in the pipeworkd as the last of the water drained out. It simply fades temp to hot then back down to … If the heating is on we get a consistent warm water, but it does not get hot and the flow is reduced. Pilot light keeps switching off. Working ok, this has started in the heater cupboard front panel the! 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