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can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
how do I rectify the fault as detailed below?
how do I vent the heat exchanger?
Vaillant 828E - no hot water?
Problem with the pressure in combi boiler?
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Hot water comes and goes!?
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my vaillant boiler is saying a code com on it ?
Why is heating on at night?
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