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We have 89 questions about mending 'vaillant boiler 242'
Vaillant eco plus 531 boiler?
Vaillant F22 fault?
Vaillant ecotec 831 plus?
Advice?
Boiler over pressure on the hot-water side?
Vaillant condensing boiler ecoTEC plus?
Vailliant turbo max plus 824e?
how do I rectify the fault as detailed below?
Vaillant 828E - no hot water?