Honeywell T40 Thermostat

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2 Dec 2022
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United Kingdom
Hi - this thermostat is driving me nuts.

It's all set up, but trying to adjust the programmes is not working for me.
I think I am getting coonfused with the numbers - the top number the plumber told me should be the time, the larger number is room temperature. He left me with a manual for an older model that doesn't resemble what I have.

I need to change the start/end times for the periods (P1, P2, P3, P4) for Monday-Thursday and same for weekend.

If anyone out there has this model or an instruction manual I could borrow that would save me pulling my hair out. I have attached a photo so you can see what I have.

Sorry, this is probably very simple for experienced heating people, but I'm a numpty when it comes to this.

Thanks for any help anybody can give me.

T40 pic.jpg
 
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Looks like you have a Honeywell T3 thermostat/programmer. Lots of links online for user manuals.
 

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