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We have 61 questions about mending 'firing hot combi' in category Heating, Home Heating Systems which have been answered
Remove boiler cover?
Boiler cycle?
Siemens RDJ10RF thermostat problem?
Vaillant ecotec 831 plus?
Fan tries to run every 15 seconds then stops immediately?
Worcester boiler dripping water?
Worcester Bosch 532/i Combi Boiler?
Vaillant F22 fault?
How do I work my Storad storage heater?