Honeywell thermostat My Honeywell thermostat model #TH8320U1008 with the touch screen recently stopped working. When I touch the screen it will not respond. Although my heat will still come on but it is locked to my settings and won't let me adjust the settings. I've only had this thermostat for about two months now. Any ideas on how to fix this?

Just fixed my thermostat using turtledriver's method (thank you!) On my unit, the LCD cable had gold contacts but the touch screen cable had silvered contacts which are susceptible to oxidation, causing exactly this kind of problem. Honeywell, why the difference? Just fixed my thermostat using turtledriver's method (thank you!) On my unit, the LCD cable had gold contacts but the touch screen cable had silvered contacts which are susceptible to oxidation, causing exactly this kind of problem. Honeywell, why the difference?

I have to say I was skeptical, but this worked and only took me 5 minutes to do. Great post! I have to say I was skeptical, but this worked and only took me 5 minutes to do. Great post!

This was really intimidating only cause I was worried I would break it. But just follow Turtledriver and slow and steady wins the race! I did it in about 8 min. and it worked like a charm! This was really intimidating only cause I was worried I would break it. But just follow Turtledriver and slow and steady wins the race! I did it in about 8 min. and it worked like a charm!

It worked for me too. Did the ribbon cables get inserted incorrectly at the factory or does the connector work loose after some time? To open the case, grab a hold of those tabs near the battery holder. It worked for me too. Did the ribbon cables get inserted incorrectly at the factory or does the connector work loose after some time? To open the case, grab a hold of those tabs near the battery holder.

This worked for me as well. Thanks for the tip!! This worked for me as well. Thanks for the tip!!

Thank you so much! You saved me $130. Thank you so much! You saved me $130.

I was going to try removing the cable to the touch screen but it looked so fragile. I decided to try changing the lithium battery, and the problem was solved. I was going to try removing the cable to the touch screen but it looked so fragile. I decided to try changing the lithium battery, and the problem was solved.

What type/voltage of lithium battery did you replace? I tried removing the cables and it didn't work. The middle of the touch screen is still unresponsive. What type/voltage of lithium battery did you replace? I tried removing the cables and it didn't work. The middle of the touch screen is still unresponsive.

This advice worked!!! My touch screen came back on ! YOu saved me $HUNDREDS! Thank you! This advice worked!!! My touch screen came back on ! YOu saved me $HUNDREDS! Thank you!

worked for me too!! thanks!!! worked for me too!! thanks!!!

My screen worked but only for a minute to change the date. Now the "done" button doesnt do anything to get back to main settings? Any advice? My screen worked but only for a minute to change the date. Now the "done" button doesnt do anything to get back to main settings? Any advice?

My screen worked but only for a minute to change the date. Now the "done" button doesnt do anything to get back to main settings? Any advice? My screen worked but only for a minute to change the date. Now the "done" button doesnt do anything to get back to main settings? Any advice?

My screen worked but only for a minute to change the date. Now the "done" button doesnt do anything to get back to main settings? Any advice? My screen worked but only for a minute to change the date. Now the "done" button doesnt do anything to get back to main settings? Any advice?

My screen worked but only for a minute to change the date. Now the "done" button doesnt do anything to get back to main settings? Any advice? My screen worked but only for a minute to change the date. Now the "done" button doesnt do anything to get back to main settings? Any advice?

Using the above post, I removed the ribbon cables but also wiped them with alcohol prior to re-seating them. My LCD display works like a charm again. I also took the opportunity to replace the lithium battery. Using the above post, I removed the ribbon cables but also wiped them with alcohol prior to re-seating them. My LCD display works like a charm again. I also took the opportunity to replace the lithium battery.

Dan I have the same problem as you - I can change the date but the "Done" button doesn't work... did you ever find a fix? Dan I have the same problem as you - I can change the date but the "Done" button doesn't work... did you ever find a fix?

I have the VisionPRO TH8000 Series. You'll need one of those "star" screwdrivers or sockets to remove two screws. I unplugged both ribbon cables, gave it a minute and reattached. Even with the backup batteries falling out, my settings were saved and, "VOILA!" Thanks for the great post! I have the VisionPRO TH8000 Series. You'll need one of those "star" screwdrivers or sockets to remove two screws. I unplugged both ribbon cables, gave it a minute and reattached. Even with the backup batteries falling out, my settings were saved and, "VOILA!" Thanks for the great post!

I can't Find the tabs to lift to remove the ribbon cables I can't Find the tabs to lift to remove the ribbon cables

No, did that, didn't help No, did that, didn't help

this worked great, thanks !! Blacksburg Virginia this worked great, thanks !! Blacksburg Virginia

Thank you so much for your response. Worked perfectly. Thank you so much for your response. Worked perfectly.

sadly did not work for me. reseated both cables, touchscreen still not responsive. too bad, will have to replace. sadly did not work for me. reseated both cables, touchscreen still not responsive. too bad, will have to replace.

Thank you so much. Your easy steps worked like a charm. Very grateful!! Thank you so much. Your easy steps worked like a charm. Very grateful!!

I know this was originally posted a while back and hopefully this thread is still being monitored. I have a similar Honeywell IAQ thermostat but the problem I am having is that the buttons on the left side of the screen (HOLD, SCREEN, SYSTEM and FAN) only work occasionally. This can really put a crimp in changing, for instance, permanently changing the schedule. Is there any way just to replace the touch screen or does anyone sell just a replacement touch screen for these thermostats? I know this was originally posted a while back and hopefully this thread is still being monitored. I have a similar Honeywell IAQ thermostat but the problem I am having is that the buttons on the left side of the screen (HOLD, SCREEN, SYSTEM and FAN) only work occasionally. This can really put a crimp in changing, for instance, permanently changing the schedule. Is there any way just to replace the touch screen or does anyone sell just a replacement touch screen for these thermostats?

My specific problem on the Honeywell TH8321U1006 was (1) the humidity gauge was faulty -- reading 87% rather than 66%, thus the A/C was going on way too much, and (2) the touchscreen was not working on the right side (only), so it was impossible to adjust the temperature, even though the system was working. The advice from Turtledriver not only fixed problem #2, but also (why?) problem #1. And it's really not hard to follow his/her directions. THANKS. My specific problem on the Honeywell TH8321U1006 was (1) the humidity gauge was faulty -- reading 87% rather than 66%, thus the A/C was going on way too much, and (2) the touchscreen was not working on the right side (only), so it was impossible to adjust the temperature, even though the system was working. The advice from Turtledriver not only fixed problem #2, but also (why?) problem #1. And it's really not hard to follow his/her directions. THANKS.

Excellent. Worked. Thanks. The ribbon won't come out of the little white plug on the circuit board unless you unlock the plug by sliding the two tiny locks on either side of each plug. The locks slide slide parallel to the board. One ribbon was still stubborn so I used my electronic screwdriver by sliding inside of the loop and pulling. I'm guessing doing this discharges curent to the screen. I wonder if removing the backup disc battery wouldn't work, but you would have to re enter time Daye and schedule if so. Thanks again! Excellent. Worked. Thanks. The ribbon won't come out of the little white plug on the circuit board unless you unlock the plug by sliding the two tiny locks on either side of each plug. The locks slide slide parallel to the board. One ribbon was still stubborn so I used my electronic screwdriver by sliding inside of the loop and pulling. I'm guessing doing this discharges curent to the screen. I wonder if removing the backup disc battery wouldn't work, but you would have to re enter time Daye and schedule if so. Thanks again!

Thank you, now it works again Thank you, now it works again

Thank you! This worked!!! Thank you! This worked!!!