vaillant ecoTEC plus boiler fault code - how to fix?
my vaillant boiler is saying a code com on it ?
how do I rectify the fault as detailed below?
resetting thermostatat?
can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Advice?
How do I fix f22 error on my Vaillent Ecotec Plus boiler?
Vaillant Thermocompact Fault?
Valiant thermostat , BMU-Err ?