Honeywell controller faulty LCD display

This video shows how I repaired a failing LCD display on a Honeywell central heating control unit.
As this was my first attempt, I have shown how I did it step by step.
It's not too difficult and and with some care anyone can do it.
Remember this was my first time also.
Important lesson..I would definitely recommend using a domestic hairdryer and not a heat gun.
I hope you find this video useful and if so please consider leaving me a like, I will appreciate it.
Thank You for Watching.
Jox Vox

[@zantelion1052]

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

[@pruechits438]

Hello... Please do you mean you did not take it apart? You only removed the batteries and blow dried the scree whilst it was still mounted on the wall with the covers on?

[@andrewverdon2078]

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

[@markwoodings]

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 👍🏻

[@JOXVOX]

Hi Thanks for your comment, I am pleased it worked out with you, all the best

[@JeanTheCreativePixie]

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.

[@crazy_horse8010]

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.

[@terrybadge]

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

[@samlee7055]

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!

[@JOXVOX]

Thanks, you are most welcome, glad it helped.

[@JOXVOX]

You are most welcome, thanks for your comment

[@skoeifrl66]

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.

[@JOXVOX]

Your Most Welcome,you'r a man after my own heart, Cheers Jox

[@yannherault7522]

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

[@LMV102]

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.

[@JOXVOX]

Hi, Thanks for your kind feedback, I too have learned from some of the Indian you tube videos.

[@jaydoyle31]

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

[@JOXVOX]

Thank you glad it helped Bob.

[@andrewjames4617]

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

[@traciehamilton2181]

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

[@JOXVOX]

Thank you Tracie, I am glad it helped. Jox Vox

[@JOXVOX]

Glad it helped,thanks for your comment

[@joaquin_12_b]

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.

[@JOXVOX]

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

[@David_Parr]

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

[@JOXVOX]

Glad it helped, you are most welcome

[@JiriTkadlec-bl7ft]

Děkuju za radu opravu jsem úspěšně dokončil👍

[@blot100]

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.

[@JOXVOX]

You are most welcome, thanks for commenting😀

[@zahidwali]

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

[@JOXVOX]

You are very welcome,I am glad to help, thanks for your kind comment, Jox Vox

[@robertwragg97]

Splendid! Saved time trouble and money. Thank you!

[@etienneletourneurdubreuil7221]

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

[@etienneletourneurdubreuil7221]

temperature was at least 60 degrees celsius during 2 minutes, and then it worked !!🙏🙏)

[@JOXVOX]

@@etienneletourneurdubreuil7221 Thank you for your feedback, I think this may help others also good luck

[@user-qq8gy7um8f]

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

[@JOXVOX]

You are most welcome,thanks for your feedback,much appreciated

[@nickefthymiou858]

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

[@JOXVOX]

You are welcome, glad it helped, thanks for you kind comment

[@Desertboarder1976]

Worked like a dream!!!

[@paigebeattie8738]

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

[@JOXVOX]

Great, glad to have helped, thanks for your feedback,it's important to me Jox Vox

[@laurenolivier8312]

Many thanks from France !!!

[@JOXVOX]

Thank you ,glad it helped,

[@JOXVOX]

Glad it helped thanks for your comment

[@inoxlebossggv2818]

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

[@paddytt]

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

[@JOXVOX]

Smashing, just the job. Thanks for your comment

[@JOXVOX]

Glad it helped thanks for your comment

[@bassmandudge]

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

[@JOXVOX]

You are most welcome,glad it helped

[@bassmandudge]

@@JOXVOX yes brilliant ... As a matter of interest What is the heat actually doing?

[@davidsalter2717]

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.

[@duchesssilver4722]

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

[@JOXVOX]

Thanks, You are most welcome

[@SpiritoussantousS]

So cool, it Works !

[@Kenwes1]

It worked perfectly - thank you.

[@JOXVOX]

Thanks for your comment, glad it helped.

[@JOXVOX]

Glad it helped thanks for your comment

[@CanadianCarpinHolidays]

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

[@JanieJane6149]

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

[@JOXVOX]

Thank you, glad it helped.

[@JOXVOX]

Glad it helped

[@oaube]

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.

[@JOXVOX]

Thanks for your feedback,I am glad it helped,cheers

[@JOXVOX]

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

[@TheFutile007]

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.

[@JOXVOX]

Hi David, very interesting , this is something I will look at myself, thanks for you input, and this may help others. Cheers

[@TomRelubbus]

Excellent

[@JOXVOX]

Thanks for your comment.

[@JOXVOX]

Thanks for your interest

[@davidgiron4359]

Respect 👍🏽

[@lemarin587]

Bravo

[@philippebodson4485]

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)

[@samuelmunoz1723]

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

[@Intxaurrandieta]

¡Funciona! Gracias.

[@JOXVOX]

Thank You

[@JOXVOX]

Glad it helped ,thanks for your comment

[@giuseppesanfilippo1418]

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

[@nitrousman8882]

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 :) )

[@JOXVOX]

Hi, I agree, your thinking is valid and it would be a more gentle even heat, thanks for your input

[@theinel]

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

[@garysaunders2338]

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?

[@t-rex8009]

👏👏👏

[@georgemartinezza]

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).

[@JOXVOX]

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

[@Mrtinks]

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

[@juliearmitage6617]

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!

[@JOXVOX]

Hi Julie, thanks for your question, unfortunately I am not familiar with this fault, I suggest some of the other y.t. may help.

[@karmanisoekarto4141]

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

[@JOXVOX]

Yes the hair dryer is the safer option,just heat evenly and avoid hotspots,thanks for your comment, Bob.

[@enlacejuridicogerencia605]

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

[@JOXVOX]

Creo que si lo intentas lentamente y con cuidado, lo harás bien. Tienes poco que perder si lo intentas. suerte ya me cuentas como te va, saludos. Beto.

[@martinswindell8337]

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..

[@stephennichols2533]

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.

[@JOXVOX]

Yes I would say so, but be careful and don't use too much local heat,.Please let me know how you get on, cheers

[@stephennichols2533]

@@JOXVOX Hi, I posted an update above. didn't use the heatgun, just contact cleaner & another set of new batteies. ALL is now good :)

[@JOXVOX]

@@stephennichols2533 Hi Great it did the job

[@stephennichols2533]

@@JOXVOX Further update: I had issues after the repair in that the 2 up/down temp buttons did not work. This was down to me and my cleaning of the back of these buttons with contact cleaner, I am a fool!!! in doing this I cleaned off the conductive coating, yes I know I am fool!! However I managed to repair these with an HB pencil rubber over the button suface, so all good. Might be worth adding a note to your video warning about this.

[@JOXVOX]

@@stephennichols2533 Genius work on your part, glad you sorted it, thanks for posting.

[@user-pd2xn7ip6w]

Класс!!!

[@abdel-hadikaddour8400]

Bravo

[@JOXVOX]

Glad it helped thanks for your comment