Old wireless Honeywell CM927 thermostat

FreeBear

stripling said: I don't want lots of data-stealing 'smart' controls. I'm not a luddite, I can code. But these Honeywells give you the best of both worlds unless you really want to use your phone to control your central heating. 

Don't know just how much data these internet connected smart controls send out. But I don't want to be reliant on a remote server being up 24/7 for ever more - Nest (a.k.a. Google) has already announced that support for some of their IoT devices are to be dropped. Hive has already dropped some of their stuff as well.

Keeping the smarts "in house" with open source software is the only real long term solution - Plenty of packages that will run on small low power computers such as the Raspberry Pi. My current choice is Home Assistant coupled with esphome for the IoT devices. Whilst not for everyone (the learning curve can be daunting), it works for me.

ThisIsWeird

kev1744 said:

i had exact same issue with my cm927. if you search online for a pro wireless stat it is a direct swap for the cm927.i think it cost me about £50 took me about 5 minutes to swap them. no need to change the receiver just press a couple of buttons and that was it.
having said that i would first swap the batteries in the cm927 just in case its the batteries that need changing.

Good to have an alternative, but that's a 'basic' digital stat and doesn't have any programming abilities.

I would personally suggest a Prog Stat is a must at minimum. And Smart is better still - if only for the ease of setting up, and being able to change the temp whilst sitting on yer arris.

ThisIsWeird

stripling said:

I have one of these - it's brilliant. I use it in combination with thermostatic radiator controls (and good insulation) to keep on top of my energy bills.
It's programmable for the week, it judges temperature based on whatever room it is in so in the morning, for instance, you can have it in the bedroom and not use excessive energy heating a living room to full temperature. You can just hang it on a wall and use it like a 'normal' central heating control if you prefer. 
I don't want lots of data-stealing 'smart' controls. I'm not a luddite, I can code. But these Honeywells give you the best of both worlds unless you really want to use your phone to control your central heating. 
You can find the manual by Googling. 

Not sure I follow what you are saying there. 

Yes, whatever room the 'stat is in will be the one that'll determine the CH, but it will still affect the whole house - unless the rads in the other rooms have been manually turned down.

If you 'ask' your bedroom to be warm - say, 20oC - at 7am, and have the 'stat in that bedroom, then the whole house will still heat up at the same time.

Ultimate solution is to go Smart, and have Smart TRVs fitted to the rads in the main rooms. And you could buy at least two of these for the new price of a CM927.

kev1744

ThisIsWeird said:

kev1744 said:

i had exact same issue with my cm927. if you search online for a pro wireless stat it is a direct swap for the cm927.i think it cost me about £50 took me about 5 minutes to swap them. no need to change the receiver just press a couple of buttons and that was it.
having said that i would first swap the batteries in the cm927 just in case its the batteries that need changing.

Good to have an alternative, but that's a 'basic' digital stat and doesn't have any programming abilities.

I would personally suggest a Prog Stat is a must at minimum. And Smart is better still - if only for the ease of setting up, and being able to change the temp whilst sitting on yer arris.

lost me a bit... when you say no programmable abilities what do you mean? the one i got i can programme heating to come on at set times during the day over a 7 day period....what more would i need?

FreeBear

kev1744 said:

ThisIsWeird said:

kev1744 said:

i had exact same issue with my cm927. if you search online for a pro wireless stat it is a direct swap for the cm927.i think it cost me about £50 took me about 5 minutes to swap them. no need to change the receiver just press a couple of buttons and that was it.
having said that i would first swap the batteries in the cm927 just in case its the batteries that need changing.

Good to have an alternative, but that's a 'basic' digital stat and doesn't have any programming abilities.

I would personally suggest a Prog Stat is a must at minimum. And Smart is better still - if only for the ease of setting up, and being able to change the temp whilst sitting on yer arris.

lost me a bit... when you say no programmable abilities what do you mean? the one i got i can programme heating to come on at set times during the day over a 7 day period....what more would i need?

Set to 19°C for an hour in the morning, dropping down to 18°C for the day. Come the evening, shift up to 20°C until bed time, and then down to 16°C overnight.

With your standard 7 day timer, you can only set a single temperature, and you need to manually adjust the thermostat if you want hotter or colder.

ThisIsWeird

kev1744 said:

ThisIsWeird said:

kev1744 said:

i had exact same issue with my cm927. if you search online for a pro wireless stat it is a direct swap for the cm927.i think it cost me about £50 took me about 5 minutes to swap them. no need to change the receiver just press a couple of buttons and that was it.
having said that i would first swap the batteries in the cm927 just in case its the batteries that need changing.

Good to have an alternative, but that's a 'basic' digital stat and doesn't have any programming abilities.

I would personally suggest a Prog Stat is a must at minimum. And Smart is better still - if only for the ease of setting up, and being able to change the temp whilst sitting on yer arris.

lost me a bit... when you say no programmable abilities what do you mean? the one i got i can programme heating to come on at set times during the day over a 7 day period....what more would i need?

I did a Google for 'pro wireless stat' for around £50,  and what I found were digital room stats, but not programmable. But if you are referring to a prog type, then fine, and - yes - what more would you need?
Except the ability to adjust the temp from your seat. Even asking Alexa to do it for you. Or even, as I did today from Instow beach in a 50mph breeze, turn the heating up a notch as we had to pick up mil on the way home :-(

kev1744

FreeBear said:

kev1744 said:

ThisIsWeird said:

kev1744 said:

i had exact same issue with my cm927. if you search online for a pro wireless stat it is a direct swap for the cm927.i think it cost me about £50 took me about 5 minutes to swap them. no need to change the receiver just press a couple of buttons and that was it.
having said that i would first swap the batteries in the cm927 just in case its the batteries that need changing.

Good to have an alternative, but that's a 'basic' digital stat and doesn't have any programming abilities.

I would personally suggest a Prog Stat is a must at minimum. And Smart is better still - if only for the ease of setting up, and being able to change the temp whilst sitting on yer arris.

lost me a bit... when you say no programmable abilities what do you mean? the one i got i can programme heating to come on at set times during the day over a 7 day period....what more would i need?

Set to 19°C for an hour in the morning, dropping down to 18°C for the day. Come the evening, shift up to 20°C until bed time, and then down to 16°C overnight.

With your standard 7 day timer, you can only set a single temperature, and you need to manually adjust the thermostat if you want hotter or colder.

hmm thats odd as on mine i can set it to be 19 in the morning, 21 an hour later etc...it has 4 different time zones i can program in

kev1744

ThisIsWeird said:

kev1744 said:

ThisIsWeird said:

kev1744 said:

i had exact same issue with my cm927. if you search online for a pro wireless stat it is a direct swap for the cm927.i think it cost me about £50 took me about 5 minutes to swap them. no need to change the receiver just press a couple of buttons and that was it.
having said that i would first swap the batteries in the cm927 just in case its the batteries that need changing.

Good to have an alternative, but that's a 'basic' digital stat and doesn't have any programming abilities.

I would personally suggest a Prog Stat is a must at minimum. And Smart is better still - if only for the ease of setting up, and being able to change the temp whilst sitting on yer arris.

lost me a bit... when you say no programmable abilities what do you mean? the one i got i can programme heating to come on at set times during the day over a 7 day period....what more would i need?

I did a Google for 'pro wireless stat' for around £50,  and what I found were digital room stats, but not programmable. But if you are referring to a prog type, then fine, and - yes - what more would you need?
Except the ability to adjust the temp from your seat. Even asking Alexa to do it for you. Or even, as I did today from Instow beach in a 50mph breeze, turn the heating up a notch as we had to pick up mil on the way home :-(

this is the one i got
  https://www.buildandplumb.co.uk/plumbing-heating-c36/heating-c264/heating-controls-c219/programmable-thermostats-c356/pro-wireless-programmable-thermostat-p10086

its a 7 day programmable stat. each day it has 4 time zones i can set to different temps...not sure this is the place i bought mine from but its the same one

ThisIsWeird

kev1744 said:

ThisIsWeird said:

kev1744 said:

ThisIsWeird said:

kev1744 said:

i had exact same issue with my cm927. if you search online for a pro wireless stat it is a direct swap for the cm927.i think it cost me about £50 took me about 5 minutes to swap them. no need to change the receiver just press a couple of buttons and that was it.
having said that i would first swap the batteries in the cm927 just in case its the batteries that need changing.

Good to have an alternative, but that's a 'basic' digital stat and doesn't have any programming abilities.

I would personally suggest a Prog Stat is a must at minimum. And Smart is better still - if only for the ease of setting up, and being able to change the temp whilst sitting on yer arris.

lost me a bit... when you say no programmable abilities what do you mean? the one i got i can programme heating to come on at set times during the day over a 7 day period....what more would i need?

I did a Google for 'pro wireless stat' for around £50,  and what I found were digital room stats, but not programmable. But if you are referring to a prog type, then fine, and - yes - what more would you need?
Except the ability to adjust the temp from your seat. Even asking Alexa to do it for you. Or even, as I did today from Instow beach in a 50mph breeze, turn the heating up a notch as we had to pick up mil on the way home :-(

this is the one i got
  https://www.buildandplumb.co.uk/plumbing-heating-c36/heating-c264/heating-controls-c219/programmable-thermostats-c356/pro-wireless-programmable-thermostat-p10086

its a 7 day programmable stat. each day it has 4 time zones i can set to different temps...not sure this is the place i bought mine from but its the same one

My apologies, Kev - that is, indeed, a Prog Stat.

It looks identical to the non-Prog version (£20 cheaper), and I'm surprised at how little info is on the display screen. (IS that its real screen, or are they showing the room stat version in that pic?)

May I ask - how easy is it to program? And to override? 

kev1744

ThisIsWeird said:

kev1744 said:

ThisIsWeird said:

kev1744 said:

ThisIsWeird said:

kev1744 said:

i had exact same issue with my cm927. if you search online for a pro wireless stat it is a direct swap for the cm927.i think it cost me about £50 took me about 5 minutes to swap them. no need to change the receiver just press a couple of buttons and that was it.
having said that i would first swap the batteries in the cm927 just in case its the batteries that need changing.

Good to have an alternative, but that's a 'basic' digital stat and doesn't have any programming abilities.

I would personally suggest a Prog Stat is a must at minimum. And Smart is better still - if only for the ease of setting up, and being able to change the temp whilst sitting on yer arris.

lost me a bit... when you say no programmable abilities what do you mean? the one i got i can programme heating to come on at set times during the day over a 7 day period....what more would i need?

I did a Google for 'pro wireless stat' for around £50,  and what I found were digital room stats, but not programmable. But if you are referring to a prog type, then fine, and - yes - what more would you need?
Except the ability to adjust the temp from your seat. Even asking Alexa to do it for you. Or even, as I did today from Instow beach in a 50mph breeze, turn the heating up a notch as we had to pick up mil on the way home :-(

this is the one i got
  https://www.buildandplumb.co.uk/plumbing-heating-c36/heating-c264/heating-controls-c219/programmable-thermostats-c356/pro-wireless-programmable-thermostat-p10086

its a 7 day programmable stat. each day it has 4 time zones i can set to different temps...not sure this is the place i bought mine from but its the same one

My apologies, Kev - that is, indeed, a Prog Stat.

It looks identical to the non-Prog version (£20 cheaper), and I'm surprised at how little info is on the display screen. (IS that its real screen, or are they showing the room stat version in that pic?)

May I ask - how easy is it to program? And to override? 

no worries ...to be fair they all look similar.
its very easy to programme just set time and temp for each time segment and then i just copied each day to the next. the override is very easy...press a button to turn it off or again to set it to manual, failing that it has plus and minus buttons if you just want to give it a boost or reduce temp.
i didnt even have to change the receiver so to pair it with the boiler was just a case of pressing a couple of buttons for 15 seconds ( although i did you tube it first to make sure it would work)