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We have 551 questions about mending 'not turning off' in category Heating, Home Heating Systems which have been answered
Vaillant F22 fault?
Siemens RDJ10RF thermostat problem?
Fan tries to run every 15 seconds then stops immediately?
Boiler cycle?
Worcester Bosch 532/i Combi Boiler?
Worcester boiler dripping water?
Remove boiler cover?
How do I work my Storad storage heater?
Vaillant ecotec 831 plus?