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Mend Potterton Performa 28 Central Heating Pcb

Potterton Performa 28 Heating?

My Potterton Performa 28 is working and carrying out functions of heating water and central heating. However, it has now started switching on central heating even when it at hot water only setting. It also randomly switches on heating unless it is set to "0". I have replaced the timer switch, thermostat, and PCB and it still not fixed problem. Any suggestions would be greatly appreciated. Thank you.

Ian
October 2013
i would suspect the diverter valve. i would have checked this part first from experince

kash
October 2013

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