Honeywell CM907 problems

[pinkwhippet]

Hi, I'm new to the forum and was wondering if anyone could shed some light...

We have a Honeywell CM907 thermostat controlling our underfloor heating system (It was already all installed when we moved in). The thermostat has been working ok (since we finally worked out how to turn the underfloor heating on at the boiler!), however the display has gradually been fading, bits of the display are not showing at all, for example you can only see half the time display. Checked the battery and this appears to be fine, even tried new batteries and no difference.

Today the 'current temp' has started to show as 0 degrees, which is obviously wrong as its about 17 degrees in the room. Does this mean the thermostat is broken? Or is there anything we can do? Of course the thing is now calling for heat constantly because it thinks we are freezing

I noticed a new Honeywell is about £75! so I'm not about to rush out and buy a new one. Any advice would be hugely appreciated.

 

[Dan Robinson]

Contact honeywell, preferably with an installation date (if not remove it from the wall and give them the numbers on the sticker on the back).

Depending on its age they may well send you a new one.

 

[pinkwhippet]

Contact honeywell, preferably with an installation date (if not remove it from the wall and give them the numbers on the sticker on the back).

Depending on its age they may well send you a new one.

Um, I have no idea when it was installed or how to remove it from the wall!

 

[Dan Robinson]

Try here.

 

[pinkwhippet]

Well we managed to get it off the wall, however Honeywell say they can't answer questions from domestic customers and it's almost certainly more than a year old. Is there any way of servicing these things? Or any reason why the thermostat might be inaccurate?

 

[Dan Robinson]

Try them again.

I doubt you spoke to Honeywell today.

 

[D_Hailsham]

Honeywell say they can't answer questions from domestic customers

I guess you found that here on their website.

Ignore it, it only applies to Technical Support, e.g complicated installations.

Just submit an Email Request and you should get a reply very quickly.

 

[pinkwhippet]

Honeywell say they can't answer questions from domestic customers

I guess you found that here on their website.

Ignore it, it only applies to Technical Support, e.g complicated installations.

Just submit an Email Request and you should get a reply very quickly.

Thank you, I will try emailing them