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ah, sorry, I'm not very clued up on boilers :-) yes, there is an airing cupboard upstairs with a tank in it yes. it has various bits attached to it yes. great, thank you for clearing that up. My mother had an electrician round today to do something else, and he said the Honeywell thermostat...

this is the boiler http://www.idealboilers.com/mexico_he_details.html

yes, its a condensing one. the condensor froze up over the weekend ! boiling water had to be poured on the pipe outside.

I don't suppose it will make any difference that the boiler is a condensor boiler rather than a Combi boiler will it ?

I'm not sure what colour the original cable was, all I remember was that the sleeve cable colour was blue. I can check this when i change it next weekend

i made a note of the existing terminals on the RMT230 last time I was at her house by taking the RMT230 off the wall after cutting all of the power at the ICD box for the whole house (i don't take chances with electricity !) This is what I noted was connected. 4 = Blue Wire (Neutral) 1 =...

thanks flameport ! fast reply ! that seems easy enough then. Can you think of any gotchas I might experience ? The boiler was newly installed (replaced a 20 year old one) about 4 years ago - Its not been hugely reliable for her, it broke down again today because the condensor had...

Hi I have purchased for my mum a Honeywell CM907 to replace her RMT230 Danfoss thermostate to give her more control over heating coming on and off. I have installed an CM907 before to replace an RMT230, but when I did it at my house, I only had a two wire installation to convert so it was...