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Main Burner problems - Potterton Profile 80e?

Main Burner starts up but for only about 3 to 5 mins then shuts off leaving pilot light on, main fan is running and pump is working. If I then turn off Boiler and start again, it just repeats the same problem
Neill, April 2011
pcb problem.will need to be replaced.turning off boiler and on again resets pcb untill problem repeats.

neil, April 2011
pilot solenoid may be stuck on, if so new gas valve req'd.

Ian, April 2011
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