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