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Discuss If I replace CM927 will it work with the existing Relay box? in the Plumbing Forum | Plumbing Advice area at PlumbersForums.net

Hi.
CM927 Wireless programmable Thermostat and Relay box were fitet in my house Sept. 2008.

Now the CM927 seems to misbehave, If I buy a replacement CM927 will it work with the existing Relay box?
 
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If I buy a replacement CM927 will it work with the existing Relay box?
Before buying a replacement... Have you reset the pairing ('binding') of the existing devices and installed new good quality batteries in the CM927? (By 'good quality' I don't mean some fake you got cheap from eBay but branded, e.g. Duracell, and bought from an authorised stockist with a big turnover, such as a supermarket.)

I would expect the new device to bind to the existing receiver without any trouble but personally I'd buy the pair because the cost won't be much more if you hunt around a bit and it won't hurt to have a spare 'in stock' if it's not needed.
 
Before buying a replacement... Have you reset the pairing ('binding') of the existing devices and installed new good quality batteries in the CM927? (By 'good quality' I don't mean some fake you got cheap from eBay but branded, e.g. Duracell, and bought from an authorised stockist with a big turnover, such as a supermarket.)

I would expect the new device to bind to the existing receiver without any trouble but personally I'd buy the pair because the cost won't be much more if you hunt around a bit and it won't hurt to have a spare 'in stock' if it's not needed.
Thank you

Yes the good bats are 3-4 months old & show still charged on the mustimeter.

It must have been paired by Mark the plumber on installation Sep. 2008

Can I reset the "pairing" & how?

What happened 3 days ago, in AUTO (always used auto) it failed to heat (cold rads), & now every time we have to give it a nudge by increasing the demand Temp 1-2 degrees from 29 (Ambien room Temp 19 dc) & it starts heating again, & also 3 midnights ago it came ON on its own when its programmed to go off at 10:00.
 
What happened 3 days ago, in AUTO (always used auto) it failed to heat (cold rads), & now every time we have to give it a nudge by increasing the demand Temp 1-2 degrees from 29 (Ambien room Temp 19 dc) & it starts heating again, & also 3 midnights ago it came ON on its own when its programmed to go off at 10:00.
Okay, I'd say those are the symptoms of a CM927 problem not a communication ('pairing') problem.

You could try performing a 'factory reset':


and reprogramming your cm927 but the chances of it fixing the problem are slim to zero.

In your position I'd just order a replacement. The only way to be sure with these problems is to test by substitution.
 
Okay, I'd say those are the symptoms of a CM927 problem not a communication ('pairing') problem.

You could try performing a 'factory reset':


and reprogramming your cm927 but the chances of it fixing the problem are slim to zero.

In your position I'd just order a replacement. The only way to be sure with these problems is to test by substitution.
Thank you Sir, I will act immetiately. …..nick
 
Hi, wondered how you got on with this? I have the CM927 like yours installed about 10 years ago with the receiver box. Seems it has done rather well as the screen has been okay but the 'up' button has been becoming less and less responsive and thought I would be organised and sort over the summer. Quote for a new (upgraded) model was around £170 and being on a tight budget I bought a replacement unit (Just the thermostat) from ebay. I read the instructions first thinking I just needed to unbind the current one and rebind the new one however it has turned out not to be so simple! When I press the button on the receiver it does the right flashing sequence but when I press the combination on the thermostat (up, down and left) it doesn't display ' InSt and CONTROL BINDING' as per the instructions. I thought I had bought a faulty product but when I tried to rebind my original thermostat that wouldn't display what it is supposed to either.

Has anybody come across this problem? Maybe I have to accept I need to have a new receiver and thermostat installed but I just wanted to find out what the problem is with mine first!

Many thanks in advance for any advice,
 

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