can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Hot water comes and goes!?
Vaillant ecomax 828/2 e water pressure sensor?
my vaillant boiler is saying a code com on it ?
how to fix water pressure its down at bottom of grey part?
Problem with the pressure in combi boiler?
No hot water, intermittent when air temp drops?
How do I fix f22 error on my Vaillent Ecotec Plus boiler?
how do I rectify the fault as detailed below?
How can I fix my Vailant Eco tec plus 438?
Boiler over pressure on the hot-water side?
Vaillant 828E - no hot water?