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- 4 Jun 2014
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About once or twice a day the boiler cuts out with the 60deg light flashing. I can also force this by turning the boiler to Off and then immediately back on again. If I wait 30 mins in either case the boiler will fire up and operate as normal including hot water and showers.
When I force a cut-out so the light is flashing then I can hear that the pump is running for about 3 mins then it will stop, but I still have to wait for 1/2 hr before it will kick in again by turning to Off then On (left hand knob).
House is bungalow, boiler at the back, pipes run above through attic, all rads at ground level.
Recent history:
July - boiler serviced all reported ok.
Aug - no hot water but radiators would warm up instead. Diverter valve replaced. Engineer had a minor panic as he got water on the circuit board which he immediately dried.
Next day pressure was dropping and drips in overflow pipe. Tried clearing by blowing out (quick releases of valve and repressurising). Problem cleared for a few days then continued. I kept topping up and tried to keep the pressure up until:
Mid Oct - PRV was replaced.
As there had been a lot of fresh water introduced I added 1 litre of inhibitor and bled the system. All running ok.
Nov - boiler started cutting out.
Bled the system again, and again. One radiator seemed prone but eventually was satisfied I'd got all air out.
Engineer visited today and showed him the forced boiler cut out - he's still at a loss and said he could replace this or that (eg pump) but no guarantee that it would fix the problem.
I need a better answer or a better way to diagnose the issue please, including items (if any) that can be ruled out.
Note the pressure gauge is fine, running at about 1.0bar when completely cold and up to about 2.5bar when all up to temperature, currently 50C
When I force a cut-out so the light is flashing then I can hear that the pump is running for about 3 mins then it will stop, but I still have to wait for 1/2 hr before it will kick in again by turning to Off then On (left hand knob).
House is bungalow, boiler at the back, pipes run above through attic, all rads at ground level.
Recent history:
July - boiler serviced all reported ok.
Aug - no hot water but radiators would warm up instead. Diverter valve replaced. Engineer had a minor panic as he got water on the circuit board which he immediately dried.
Next day pressure was dropping and drips in overflow pipe. Tried clearing by blowing out (quick releases of valve and repressurising). Problem cleared for a few days then continued. I kept topping up and tried to keep the pressure up until:
Mid Oct - PRV was replaced.
As there had been a lot of fresh water introduced I added 1 litre of inhibitor and bled the system. All running ok.
Nov - boiler started cutting out.
Bled the system again, and again. One radiator seemed prone but eventually was satisfied I'd got all air out.
Engineer visited today and showed him the forced boiler cut out - he's still at a loss and said he could replace this or that (eg pump) but no guarantee that it would fix the problem.
I need a better answer or a better way to diagnose the issue please, including items (if any) that can be ruled out.
Note the pressure gauge is fine, running at about 1.0bar when completely cold and up to about 2.5bar when all up to temperature, currently 50C