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We have 374 questions about mending 'heat exchanger gone' in category Heating, Home Heating Systems which have been answered
Vaillant F22 fault?
Remove boiler cover?
Vaillant ecotec 831 plus?
Fan tries to run every 15 seconds then stops immediately?
Worcester Bosch 532/i Combi Boiler?
Boiler cycle?
Worcester boiler dripping water?
How do I work my Storad storage heater?
Siemens RDJ10RF thermostat problem?