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We have 37 questions about mending 'vaillant gb 242 eh'
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
Vaillant condensing boiler ecoTEC plus?
Vaillant eco plus 531 boiler?
Vaillant F22 fault?
Vaillant ecotec 831 plus?
how to fix water pressure its down at bottom of grey part?
how do I rectify the fault as detailed below?
Vaillant 828E - no hot water?
Boiler over pressure on the hot-water side?