can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
how do I rectify the fault as detailed below?
Vaillant ecotec 831 plus?
Hot water comes and goes!?
Vaillant vcw gb242 eh central heating problem?
Vaillant Ecotech Plus 831 F22 fault?
Vailliant turbo max plus 824e?
How do I fix f22 error on my Vaillent Ecotec Plus boiler?
What does f.25 mean?
vaillant ecoTEC plus boiler fault code - how to fix?
no heating water?
Vaillant condensing boiler ecoTEC plus?