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We have 33 questions about mending 'fault 28 boiler' in category Heating, Home Heating Systems which have been answered
Siemens RDJ10RF thermostat problem?
Fan tries to run every 15 seconds then stops immediately?
Vaillant ecotec 831 plus?
Worcester Bosch 532/i Combi Boiler?
Worcester boiler dripping water?
How do I work my Storad storage heater?
Boiler cycle?
Vaillant F22 fault?
Remove boiler cover?