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Mend Potterton Performa 28 Central Heating Hot Water 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
PottertonPotterton Performa 28Heating, Home Heating SystemsCentral Heating Hot Water PCB
i would suspect the diverter valve. i would have checked this part first from experince

kash
October 2013

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Potterton Performa 28 - Heating On When Off?