[SOLVED] Honeywell CM927 LCD screen fail - common? (2023 Update)

[noelsparty98]

replying to Graham., noelsparty98 wrote: I've had the same issue, but your advice worked wonderfully. Thank you.

[LOU JANE]

replying to Mark Dalzell, LOU JANE wrote: It just worked on mine too. Thank you!

[Mick]

replying to Phil, Mick wrote: Used this hair dryer method on my Honeywell CM921 programmer when the display broke up. The unit is 9 1/2 years old but the display was restored perfectly. Many thanks. Regards

[Rachel]

replying to Phil, Rachel wrote: This is a brilliant hack and my thermostat is now back up and running. Thank you Phil.

[CHARLES JACKSON]

replying to Graham., CHARLES JACKSON wrote: the display is now ok however the backlight is now on all the time even when off any suggestions

[The Natural Philosopher]

Such erudition from homewankers hub

[Barney]

replying to Phil, Barney wrote: Thanks very much. This worked for mine.

[rosscrook1983]

Thanks for this. The battery on our wireless thermostat ran out during the summer and when we replaced the batteries we had exactly this issue. Took it apart and did exactly this, using a hairdryer. I had to do this 4/5 times, each time putting it back together and loading the batteries, each time more of the display started to show until the whole display worked.

Great hack!

[Daeths]

replying to myrtle, Daeths wrote: Hi my unit just failed too. Stripped down as described. The trickiest bit for me was removing the actual lcd from the perspective cover. Gently prized it out. ?Unfolded? the lcd from board with the ribbon being the hinge in the middle. 15 second v hot burst with hair dryer then I used the round edge of the plastic battery cover to gently push down the ribbon on both sides as near to the screen or Baird as possible. Do not move for 30 seconds to allow to cool. Reassemble. Job done. Many thanks to all. 15 minute very easy job even for a a diy novice like me

[Alice Stanley]

replying to Phil, Alice Stanley wrote: Phil you're a star, thanks to your info plus a couple of YouTube videos my central heating controller is now working perfectly again. Thank you!

[Patel]

replying to B, Patel wrote: They told me same so I left bad reviews on trustpilot, I never expected big companies like Honeywell can conning people like us

[AWM]

*BRILLIANT - thanks Phil. Last time it cost £13.50 to repair which is not bad but lasted less than a year. 15 minutes fiddling is worth it.*

[Parksy]

replying to Phil, Parksy wrote: Achieving legendary status! Fix still works! Have a 10 year old CM927 losing digits! Still worked on auto so didn't bother fixing! Got fed up with not knowing room temp so gave it the hairdryer treatment and bingo!! Full display!!! Woop wooop! Give that man a medal!

[steve]

Omg it worked! Whoever posted this is a genius! My display was almost blank with and now it’s totally working! Saved me £93!

[Brian Gaff (Sofa]

I do wish you could post the original advice. I do remember it, form some years ago, and yes there did seem to be a lot of them with the problem. Brian

[Mathew Newton]

It's been reposted on the wiki:

[lynn]

Yes, mine's driving me crazy. Still usable, initially, - as yours - but has now completely died, so central heating not working. Help!

[Reusewhereyoucan]

Hello, very helpful ,worked for me thank you

[Rachel S]

I got a guy on eBay to replair mine. Cost £15. Free 0&o and no charge if he couldn’t repair it. No brainer!

[Fredxx]

I strong recommend you read this before you reply again to to a 5 year old post:

Most of us will have absolutely no idea what was helpful