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Vaillant eco plus 531 boiler?

replaced pcb board f70 ,asks for password no,17, but no 17 on display ,goes from 16 to 22 .on boiler vaillant... [Read more]

How can I fix this problem?

worcester 19/24 cbi keeps cutting out when the front is sealed

Thermostat question?

What are the batteries for in a wired myson mprt room thermostat, I presumed if your stats are wired there is ... [Read more]