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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]

Honeywell921?

Some of the numbers have disapeared from screen

How can i repair a noCN fault on my boiler?

ferroli optimax - fault code noCN can anybody help to resolve this matter?

Danfoss RX1?

I have a Danfoss RX1 attached to my Samsung air-water underfloor heating system. It has two buttons: Prog and ... [Read more]

Gloworm 30 CX no heating?

Gloworm 30CX I have hot water but no heating?

Ferolli Optimax HE 31C expansion vessel change?

How easy is it to change the expansion vessel on a Ferolli Optimax HE31C please? Looks straightforward but nev... [Read more]

How can I make my time clock work on my Ferroli F30?

The time clock on my Ferroli F30 shows no display

How to fix?

Gloworm 100e problem ,It's been firing up intermittently over the last few months but now when you switch on y... [Read more]