Replacement room thermostat.

[GoodDoc]

I was the person who could actually get the timer record function to work on our 25 year old VHS recorder but despite my best efforts I can not get the timer function on my Potterton Puma 80e combi boiler to work.

I was planning to wait until the Nest thermostat was available in the UK but I'm tired of waking up to a cold flat so I'm looking for a recommendation for a replacement thermostat that is programmable. WiFi and web enabled are features I generally approve of but as I still like the Nest at this stage all I really want is a good value for money reliable programmable thermostat that can easily replace my Honeywell T40.

Attached is a photo of the wiring of the existing thermostat.



Can anyone recommend a replacement that will work with my existing wiring, won't cost the earth and most importantly, doesn't require a Nasa engineer to successfully program. I'm not a trained electrician but I've happily worked with domestic electrics for decades without killing or even hurting myself, having said that is there anything I should be aware of before tackling this?

[GoodDoc]

carreauchompeur said:

Wifi you say? Bookmarked.

You can get them (e.g. http://www.amazon.co.uk/dp/B00649IWXI/ ) and they can be controlled from a web browser, but I don't really want to spend £125 on a thermostat when I'm waiting to see when/if a UK spec Nest thermostat is released.

Edited by GoodDoc on Tuesday 19th November 23:16

[GoodDoc]

megaphone said:

I have the same boiler and the same room stat. I bypassed the timer on the front of boiler and fitted a simple Sunvic 7 day programer near the boiler, keeping the roomstat for temperature control.

Note I'm pretty sure the thermostat wiring is 230v, so any replacement will need to be compatible. As it's a combi the control is a simple on/off function, more complicated stats my not work.

I'm not looking to install anything extra (unless there's a good reason). I'm effectively using the thermostat as a switch (turn to 0 when I want the heat off) and with three wires it looks like replacing it is relatively easy, however as I don't know anything about heating control systems I was looking for a recommendation.

[GoodDoc]

Brother D said:

I just bought the Nest having seen one in the flesh at someone eles's place. Even with the remote capabilities, just the styling alone is amazing (I think the compnay was set up by some Apple engineers?)
If you can't wait there are a few on-line places that will show how to hack for the UK systems. It just doesn't support the HV side of things.

Still want a nest but converting a 24V thermostat to work with a 240V heating system seems a bit daunting. I'd normally have a go at things like this, but as I'm not familiar with central heating system, and the consequence of getting it wrong is no heating then this projects falls into the not worth the risk category.

Went for a Honeywell CM907, straight swap for my existing thermostat. At £70 it's more than I wanted to spend, especially as I'm waiting for a UK nest, but it has the features I want now, and won't require experimenting in a cold flat to get it to work.

[GoodDoc]

Vron said:

Nest now include the UK on the latest software update (literally a couple of days ago). The 24v issue can be resolved with a relay I have read. The electrician is here tomorrow so i'll run it past him, that part seems straightforward. It was the lack of UK postcode that was the sticking point ................. *looks across desk at 'Nest' sat in box*

I had read that, but my feet are cold today!