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