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can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
my vaillant boiler is saying a code com on it ?
how do I rectify the fault as detailed below?
no heating water?
Vaillant condensing boiler ecoTEC plus?
No hot water, intermittent when air temp drops?
Vaillant eco plus 531 boiler?
vaillant ecoTEC plus boiler fault code - how to fix?
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Problem with the pressure in combi boiler?
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