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We have 38 questions about mending '30 red light' in category Heating, Home Heating Systems which have been answered
Remove boiler cover?
Oil fired boiler thermostat?
Vaillant ecotec 831 plus?
Worcester 30 Cadillac combi boiler won’t fire up and the EA?
Greenstar 24Ri boiler, fast flashing - can I reset?
How to fix my fireplace?
Remove cover off gas boiler?
Worcester boiler dripping water?
Siemens RDJ10RF thermostat problem?