Honeywell T4 Programmable Thermostat - Installer view

Find out about the Honeywell T4 programmable thermostat from an installers point of view

[mahichlavrenteva]

*This was perfect for my greenhouse! **Fastly.Cool** and Warming environment perfectly controlled I love how it keeps track of the temperature so you are able to go back and check how it fluctuates through the night/day*

[riverdeep]

So how do you set the calender/timer? The old model was easy, press button and repeat, this thing is utter crap :/

[philipcorps]

Can I use the existing cm 907 received with a new t4receiver thermostat

[KatieGourlay]

How do I get back to factory settings please. Thank you. Kate

[DH]

I am so upset with this rubbish T4 model. It so confusing that really makes you going mad. I had that simple thermostat before and now with all this program buttons I cannot perform a simple manual day by day timer to when I want the boiler on and off as I like. And worse of all there are no YouTube step by step tutorial to how to manually set up this crap. All videos are mainly T4 Pro American version which talks about cable installation, or all other rubbish. There are no video which explain exactly how to set up or change the function how you like. This video here is less than 4 minutes long and what explanation or help it gives you to how to use this T4 step by step? this is the only one found regarding UK model. No one proper UK Honeywell technician engineer are available to provide a nice video setting to better help you. I bet that if someone will do a nice good tutorial to how to use this crap in a step by step explanation it will get so many reviews that will give honeywell the right to pay you.

[DrQuadrivium]

Vastly over-complicated for most needs.

[relyenterprisestx]

I have a t-4 pro and it is junk! User interface is worthless, can’t change lock code. Won’t go into auto mode?!? Terrible.

[garywilson]

Too complicated for my customers. Keep it simple.