can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Vaillant igniting issue ( domestic ) not CH?
Boiler over pressure on the hot-water side?
Vaillant condensing boiler ecoTEC plus?
Vaillant 828E - no hot water?
how do I rectify the fault as detailed below?
No hot water, intermittent when air temp drops?
how to fix water pressure its down at bottom of grey part?
Hot water comes and goes!?
Vailliant turbo max plus 824e?
Vaillant ecomax 828/2 e water pressure sensor?
my vaillant boiler is saying a code com on it ?
Vaillant F22 fault?
my boiler will no work?
How do I fix f22 error on my Vaillent Ecotec Plus boiler?