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