Honeywell Home T3 Wired Smart Thermostat Kit - Wall Thermostat with Flexible Programming & ECO Mode - Battery Operated, Compatible for Combi Boilers & Heat Pumps - CM907 Replacement (T3C110AEU)

The screen on my old CM907 Timer/Thermostat failed and I found this M3 Timer/Thermostat an excellent and more functional replacement for the CM907.Very intuitive and easy to use menu system with more options than the CM907 (1 hour boost facility to name one enhancement). Although I will say the instruction sheets are more aimed at Trade or Professional Engineers / Installers than DIY fitting. But if you are familiar with programming any modern control device with a GUI interface, it is very similar to any other and actually quite easy to program.I note a lot of people complaining about the outer flap not closing properly and springing open again and having to use Blu-tack to hold it down...Don't believe this is a issue with design of the M3 itself, more the fitting instructions not being quite clear enough of how to fit the main unit into the wall/back plate. Initially my flat did keep springing out initially after following the installation diagrams as shown, but I found out as long as you firmly clip the top of the main unit in first like a hinge and then pivot it firmly downwards, clipping the bottom in last, this should then be a tight fit and the flap then close perfectly. Well mine did after doing that.I gave the M3 unit 5 stars all round as long as you understand modern GUI programming techniques and install it correctly. But would reduce this to 4 or less stars for the included M3 installation and programming instructions which could/should be better. I believe they are not aimed squarely at DIY installers without some basic skills and knowledge.Hope it last as long and as reliable as the CM907

I bought this to replace a broken CM907 controller. It fits exactly into the same screw holes and the two wires were a doodle to connect. Programming was simple too. The programmer actually has more features than the CM907 which makes this a bargain.My only problem is the cover flap is a bit flimsy compared to the previous controller and does not click into place as easily. Other than that, I’m satisfied with my purchase.

Very good thermostat and easy to install. This unit has reduced my heating bill markedly.

Honeywell is a well known and trusted brand. The thermostats functions are pretty easy to get to grips with.My big gripe with this product is the fact that it is described as 230v hard wired. Yes it is rated at 230v and is hard wired.No where in the description does it say that the clock and relay switching mechanism is battery powered, and not powered by 230v.Find this slightly mis leading as electricians we like maintenance free solutions I.E we don't want a phone call in a years time when the batteries have failed and the heating stops working.

Excellent.We needed a replacement thermostat and after much research my husband wanted this which thankfully is doing the job and working very very well.

Smart modern look. Easy to fit, my system just requires a two wire thermostat. Reasonable price. The instructions that come with it are not good, I had to resort to a YouTube video to set it up.

Like many other reviews, the cover does not shut properly and leaves a gap of 5 to 10mm.Very poor quality, avoid.

these are so user friendly a must for all