With Hot Water and Central Heating OFF, the boiler fires up as soon as the switch is moved from Standby to On. So it burns for 30 seconds, the water overheats, and the safety cutout shuts it all down. Is it the pcb or a sensor failure ?
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Pottertom Puma 80 PP modified overrun
- Thread starter Noisypuma
- Start date
DIYnot Local
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