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We have 270 questions about mending 'boiler heat exchanger' in category Heating, Home Heating Systems which have been answered
Vaillant ecotec 831 plus?
Fan tries to run every 15 seconds then stops immediately?
Boiler cycle?
Worcester Bosch 532/i Combi Boiler?
Worcester boiler dripping water?
Vaillant F22 fault?
Siemens RDJ10RF thermostat problem?
Remove boiler cover?
How do I work my Storad storage heater?