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Mend Potterton 2001

Potterton2001 controller ?

Hi, usually I can put the CH on override on its own without the HW being on, today the CH will only come on if the HW is also on override , what could be wrong with it ?

Lin
January 2014
PottertonPotterton 2001Heating, Home Heating Systems

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Topic

Potterton 2001: CH & HW Override Issue