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Vokera excel 80 sp boiler. In CH mode, the boiler fires up and then off for a 3 minute idle interval, but the fan is not slow running during the 3 minute idle interval, so the boiler is very hot. I can see the pin is not extracting, still pressing on the system flow switch unless turn off the...

did another test, turned the mode switch to hot water only with hot closed but central heating on, it run central heating when power back on.

it runs both hot tap and central heating ok as soon as the power is swith on, the problems is the presure rises by 0.2 bar just in 5 min, and stops, won't fire up again, swith off power, cools down for few min, swith on power, it fires up .

the pilot still lit, but the boiler won't fire up when turn on hot water tap. Switch off the electrical supply for a while ( about 5 minutes). it fires up at the moment the elecrical supply back on ( but it won't fire up if the switch-off back-on time is too short.

Just found out as soon as switch on the electricity supply, it starts firing up as if hot tap or radiator is open when hot tap and radiators all closed, then stops a few minutes later.

Hi I have a Vokera Excell 80SP boiler. The pilot was off two days ago ( the boiler had been working well since it was repaired just over a year ago, which costed me a few hundreds quids). I relighted the pilot, and it seemed working again when I tuned on hot water and central heating, but it...