Free repair help
We have 11 questions about mending 'vaillant ch switch'
how to fix water pressure its down at bottom of grey part?
Vaillant eco plus 531 boiler?
Boiler over pressure on the hot-water side?
Vaillant 828E - no hot water?
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
Vaillant ecotec 831 plus?
Vaillant F22 fault?
Vaillant condensing boiler ecoTEC plus?
how do I rectify the fault as detailed below?