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We have 175 questions about mending 'need circuit board' in category Heating, Home Heating Systems which have been answered
Vaillant F22 fault?
Remove boiler cover?
Vaillant ecotec 831 plus?
Siemens RDJ10RF thermostat problem?
How do I work my Storad storage heater?
Boiler cycle?
Fan tries to run every 15 seconds then stops immediately?
Worcester boiler dripping water?
Worcester Bosch 532/i Combi Boiler?