can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Vaillant ecotec 831 plus?
Valiant thermostat , BMU-Err ?
Vaillant Ecotech Plus 831 F22 fault?
Boiler over pressure on the hot-water side?
Vaillant ecotec plus 630?
Vaillant vcw gb242 eh central heating problem?
Hot water comes and goes!?
Vaillant condensing boiler ecoTEC plus?
No hot water, intermittent when air temp drops?
Vaillant 828E - no hot water?
Problem with the pressure in combi boiler?
Vaillant eco plus 531 boiler?
Vaillant Thermocompact Fault?
vaillant ecoTEC plus boiler fault code - how to fix?
Vailliant turbo max plus 824e?
How do I fix f22 error on my Vaillent Ecotec Plus boiler?
how do I rectify the fault as detailed below?