Fitting new programmable thermostat Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[stevenh78]

Hi, I have an Ideal Logic combi boiler with a mechanical timer and a separate 2 wire RAA20 thermostat in the hall.
I would like to replace the thermostat with something like the Salus RT500 but not sure how to do this since I have no live feed and neutral feed?
Are there any programmable thermostats for volt free applications that do not require a live feed? The thermostat location is actually relatively near a light switch, so should i just take the feed from there?
Thanks

Steven

[plumbbob]

Yes. In fact, I think nearly all modern programmable thermostats are volt free and run off AA batteries.