Old wireless Honeywell CM927 thermostat

onomatopoeia99

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.

This is exactly what the cm927 does.  I have one and aside from the display problem which has started affecting mine in the last few months, it does exactly what I need.  19C in the morning, down a bit during the day, back up to 19C in the evening and 16C overnight, all automatic at times I have programmed.  If I go on holiday I can set a return date and it drops the temperature to one for frost protection in the meantime.

ThisIsWeird

Looks like the CM927 is a decent beast.
It's pricey, tho', so if Kev's alternative is effectively the same, and will even pair with the Honey's receiver, that's got to be worth a look.

stripling

ThisIsWeird said:

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.

That's what I do. Radiators off or low in the parts of the house I'm not using - CM927 in my bedroom/office first thing - TRV on 4 - living room on 0 or 1 - spare rooms on 0 etc., When I want to be in the living room controls come with me, TRVs turned down in office/bedroom up in living room. It takes a second to turn a TRV dial. It helps that I live in a quite well-insulated bungalow and can divide it up heating-wise into zones. The Honeywell controls are good little pieces of kit and nothing iffy about them - no data tracking or leaching. 

ThisIsWeird

stripling said:

ThisIsWeird said:

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.

That's what I do. Radiators off or low in the parts of the house I'm not using - CM927 in my bedroom/office first thing - TRV on 4 - living room on 0 or 1 - spare rooms on 0 etc., When I want to be in the living room controls come with me, TRVs turned down in office/bedroom up in living room. It takes a second to turn a TRV dial. It helps that I live in a quite well-insulated bungalow and can divide it up heating-wise into zones. The Honeywell controls are good little pieces of kit and nothing iffy about them - no data tracking or leaching. 

Thanks. 
Yes, that's all fine, but still requires individual rads to be turned on and off, which is the same as you'd do if the CM927 was fixed in one place. 
The main benefit with your solution is that you have more accurate control of the temp of the room you are in by moving the 'stat in there, as the stat determines the room temp, and not the crude TRVs. Amen to that.