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can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Vaillant vcw gb242 eh central heating problem?
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
Hot water comes and goes!?
Problem with the pressure in combi boiler?
Vaillant 828E - no hot water?
Vaillant condensing boiler ecoTEC plus?
Vaillant ecotec 831 plus?
Vaillant F22 fault?
how to fix water pressure its down at bottom of grey part?
Vaillant eco plus 531 boiler?
how do I rectify the fault as detailed below?