Central Heating

Intermittent hot water from combi boiler

Anonymous user 16/03/2024 - 2.41 PM

When I run my hot water to take a shower or fill a bath, sometimes the boiler cuts out and runs only cold water. It doesn’t happen every time and there is no obvious pattern to it, it’s quite random. Sometimes it works perfectly. What I have noticed occurs each time prior to cutting out is the water pressure reduces only for a split second prior to the boiler cutting out. I’m in a top (3rd floor) flat and am first on the water supply so the pressure is excellent. Because it’s so random and the water pressure does flutter for a second could it possibly be that it’s occurring when another flat uses water. Another point I should add is after the boiler cuts out I can faintly hear water filling as if the boiler is filling with water again. Once that finishes the green light comes back on and I get hot water again. There are no problems whatsoever with central heating. BGas have looked and cannot find an issue with parts so I’m at a loss! The boiler does not flash lights or show an error message when this occurs.