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Potterton 80e Combi heating system on/off?

My boiler keeps coming on & going off , flame light is coming on and boiler runs for approx 30 seconds then goes off for approx 20 seconds, this continues ongoing thus system takes ages to warm up . Pump running ok.
The hot water system seems to operate ok.
Any ideas what to look at/change?

john
November 2007

Potterton Heating, Home Heating Systems Boiler Coming Going

Hi Without being there to look at the problem, it may sound like you have an intermittent fault on your PCB, good idea to get someone to have a look or check the pcb for dry joints, this maybe the problem but like i say without being there to take a look, it could be something else,
Goodluck

Jonno
November 2007

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