Honeywell controller faulty LCD display 

Just completed this fix after watching the video, I used a hairdryer for about 30 seconds, until the screen went dark. I left it to cool before removing the clips and it is perfect. Thank you very much, really easy to do and saved me £50-£60.

I left mine on the wall took out the batteries and just blew the hot hairdryer over it till the screen went dark, then blew cold air over it till it cooled down, then I put batteries back in and checked it, did this a couple of times and then finally the screen worked as good as the first day!! Thanks for this tip saved me a bit of money

Got the video recommended as watch another yesterday someone send me. It’s a great fix. Even used a toaster myself (20 seconds) worked like a charm and saved some real money in these hard times.

Thanks for sharing this. I just fixed my screen following your instructions - I used a hairdryer on the screen for 2 minutes untill the screen was an even dark colour. Then left it to cool until it was back to green. Thanks so much - you saved me a lot of money.

Howdy Jox, thanks for the video, i bought a CMT 927A on marked place with this problem. I followed your instructions ,and used a hairdryer for heating it up. The problem is fixed. My daughter was very happy with her new thermostaat for 20 euro. Greetings from the Netherlands.

I’ve been struggling to read my display for a while now and it went completely blank the other day. I was just about to pay £100 for a replacement when I came across this video. I’m glad I did because it worked. Had to do it with a hairdryer twice but the screen is now back to normal. Top man 👍🏻

Hello Sir, Being a person who works in electronics, this maintenance input is a real thing I liked learning from you, moreover, you handled the device like a baby from dismantling to reassembly..that's the good part any professional to learn. In India generally, people don't give attention to Screws, Snapfits, Retainer locks when they do service at all. that makes me impatient.

Thanks for this video, for someone who has next to no DIY skills I managed to sort out the display on the thermostat :)

Fabulous video, followed your instructions step by step and voilà my screen is fully working again. Great fix thank you 👍

Excellent video, followed it step by step, used a hairdryer instead of a heat gun, and it worked like a dream. Thanks very much indeed!

Muchas gracias, me ha funcionado. No tengo esa pistola de calor y le puesto una cartulina y he repasado por encima con el soldador. El resultado a sido perfecto.

Thank you. The toaster method didn't quite work, but using a hair dryer got the display working enough so it's usuable until we get the boiler replaced in a few weeks time.

Thanks for your feedback, I am glad you mansged to fix it, best wishes, Bob.

Thank you very much !! I’m french, and i just repaired the LCD of my Honeywell CM907 controller unit thanks to your video, a hairdryer and clips !! (first time it didn’t work, so i tried a lutter longer a second time, making sure

Thanks for the video. Worked for me. As I didn’t have a hair dryer, I held over my toaster for about one minute.

Staggered...didn't have any clips so just went careful with hair drier...perfect display again. Thanks so much...what a great hack....

Wow, this worked! Instructions and video so straightforward to follow, thank you Jox for sharing this :)

Děkuju za radu opravu jsem úspěšně dokončil👍

Pretty much worked first time (other than a tiny missing bit of an 'o' from room temperature) using a hair dryer for a while to turn screen black. Much appreciated.

Second time I've used this video and success both times! Thank you...

Thanks a lot. I was still a little doubtful, but after executing the procedure I recovered a perfect screen (and realized why my settings were completely off. I just did skip the last step - the screen was too tightly fit in the transparent plastic layer, so I applied heat without separating them.

So easy to do - just repaired my 2012 unit. Thanks Jon!

Excellent video ! I followed it step by step, my wife has a small heat gun for crafting ,but i think a hairdryer should work just keep moving around the lcd display until the screen goes black You can get the small clips like you used in your video from B&M or poundstretcher 20 clips for 79p - £1.20 a tub It worked on my 10 year old Display unit. Thank You Again

Thank you so much for putting this on. Brought my control back to life.

Merci beaucoup pour votre vidéo, j'ai réparé mon appareil grâce à vôtre aide.

Well done and explained.. Got it repaired again but with a toaster for 1-2 min!

Thank you so much for posting this!! It worked for me despite not having the clips

Splendid! Saved time trouble and money. Thank you!

Really clear instructions, easy to follow. Thank you!!

Glad it helped,thanks for your comment

Great, many thanks - worked first time, and I got some lovely toast for breakfast!

I had a go too and after a few attempts I figured out it was the plastic ribbon cable coming away from the circuit board. Once the glass screen is flipped up off the white backing. Behind the white backing is where the cable is stuck to the circuit board running my finger across this to stick it back down fixed the issue. I think the heating and clapping probably achieves the same effect.

I just got a air dryer and warm it up still on the wall to 90 on the glass reading and it worked

Thanks so much!! Was looking at a replacement, this easy fix has just saved me a few £££ 👍👍👍

Worked like a dream!!!

hello, I'm glad it worked o/k, thanks for your comment bob.

Many thanks from France !!!

Hi, Just followed this with limited sucess on our CM907. After re-assembly all of the displays are working only they are dim. yes new batteries. Should I try a second time?? Just opened it up a second time and cleaned every contact with contact cleaner, plus replaced the batteries wit a second new set....Result :) looks as good as new.

Pleased to have helped, thank for you comments

Done the same to mine,works perfect 👍 now thanks 😊

Wish I saw this yesterday. Did everything in this video but heat it up. And then got a replacement. My +&- buttons had been faulty for years though so the new unit will sort that at least. 😡

So cool, it Works !

Hi, any tips on the buttons not working? The 'up' temperature button on mine takes about 20 presses to start working and im really pressing it hard. Is this something that can be repaired? Thanks

Congratulations on your channel! Could you tell me where I can buy the compatible LCD or its characteristics to look for it? Thanks

Hello - !! and thank you again! I don't know if you could tell us somethign about this. if the LCD display of a sound stereo was exposed to the heat and light of the sun, supposedly it has suffered "birning" and the images or texts are vanished, incomplet, areas... ya know. here you add heat (00)! and it works, of course with the display I say the heat damaged it (and the light and the sun ya know) as I imagine. do you have some knowlede about this kind of failures? repair or am I wrong if it was the sun? ( some person said the reason is the Cold Soldings caused the display donesn't shows the info correctlyo or sharp, I don't think so).

Hello, what display can I buy for a Honeywell CM907? Thank you

Cela fonctionne très bien.je viens de le faire sur mon thermostat personnel. deux remarques : juste besoin de ne chauffer que la bord avec les connections . ne pas dépasser +/- 65 à 70 degré celcius. l'idéal est d'utiliser un décapeur réglable (temp de sortie 80°C max)

It worked perfectly - thank you.

Hi, I did this with a toaster and on 3rd attempt it worked but after 2 days screen gone back to how it was? Any ideas? Do I just do again?

hello, can you help me with the Honeywell CM921 thermostat? The time display is giving me an option of 0 -50 for the 24 hour clock and I can't over ride it. Ive tried to restore to factory settings but nothing is working!

Brilliant video, it worked! Thank you so much ☺🥂

Hello Sir, I just realized that a heat gun can be used to reactivate the LCD. Then hopefully hair dyer too, can be used instead of heat gun

Normally lcd has film layer on both side, is the heat save for them? thanks

reactivating the conductive adhesive to the LCD is really clever! I wonder if a reflow oven set to a low temperature would be a safer method to accomplish this. (lots of youtube video's on diy reflow :) )

Bravo

necesito la paciencia de un señor de 105 años para hacer esto

Thanks

Excellent

I’ve tried your technique to fix mine, but it didn’t work. When I press on any of the panel buttons the screen goes blank. I then have to shake it to get the screen back which is very annoying. Anyone got ideas what the problem could be? The digital display is perfect otherwise..

Respect 👍🏽

¡Funciona! Gracias.

HI, sorry to say I don't know, thanks for you interest.

👏👏👏

Класс!!!

Bravo