my vaillant boiler is saying a code com on it ?
can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
how do I rectify the fault as detailed below?
Vailliant turbo max plus 824e?
Boiler over pressure on the hot-water side?
Valiant thermostat , BMU-Err ?
Vaillant Ecotech Plus 831 F22 fault?
No hot water, intermittent when air temp drops?
How do I fix f22 error on my Vaillent Ecotec Plus boiler?
Vaillant ecotec plus 630?
Problem with the pressure in combi boiler?
Hot water comes and goes!?
vaillant ecoTEC plus boiler fault code - how to fix?
What does f.25 mean?