Vaillant ecomax 828/2 e water pressure sensor?
Vaillant Thermocompact Fault?
How do I fix f22 error on my Vaillent Ecotec Plus boiler?
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Hot water comes and goes!?
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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?