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We have 51 questions about mending 'code 24 b' in category Heating, Home Heating Systems which have been answered
Fan tries to run every 15 seconds then stops immediately?
Vaillant F22 fault?
How do I work my Storad storage heater?
Boiler cycle?
Worcester Bosch 532/i Combi Boiler?
Remove boiler cover?
Vaillant ecotec 831 plus?
Worcester boiler dripping water?
Siemens RDJ10RF thermostat problem?