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We have 37 questions about mending 'c28' in category Heating, Home Heating Systems
Oil fired boiler thermostat?
Worcester 30 Cadillac combi boiler won’t fire up and the EA?
Vaillant ecotec 831 plus?
How to fix my fireplace?
Remove cover off gas boiler?
How do i stop the time from flashing on the Siemens RDJ100RF?
Remove boiler cover?
Worcester boiler dripping water?
Greenstar 24Ri boiler, fast flashing - can I reset?