# Wyze Thermostat Black Screen - Wiring Troubleshooting **URL:** \ **Category:** Home\ **Tags:** troubleshooting, important, not-platform-specific, support\ **Created:** [December 22, 2020, 8:22pm UTC](https://forums.wyze.com/t/wyze-thermostat-black-screen-wiring-troubleshooting/150258 "2020-12-22T20:22:53Z")\ **Posts on this page:** 16\ **Page:** 1
**Author:** ![troydebie](https://avatars.discourse-cdn.com/v4/letter/t/8e7dd6/32.png) [@troydebie](https://forums.wyze.com/u/troydebie)\ **Post date:** [December 22, 2020, 8:22pm UTC](https://forums.wyze.com/t/wyze-thermostat-black-screen-wiring-troubleshooting/150258/1 "2020-12-22T20:22:53Z")
Hello, I have followed the install instruction on the application. The Wyze thermostat is working fine through the application and controlling the system. The screen on the thermostat does not function or turn on at all. Here are the pre-wiring pics: ![pre wiring 2](https://us1.discourse-cdn.com/wyze/original/3X/1/5/15fda25662c4dae9a5d0eee6fae8de33bb042d8b.jpeg) ---
**Author:** ![troydebie](https://avatars.discourse-cdn.com/v4/letter/t/8e7dd6/32.png) [@troydebie](https://forums.wyze.com/u/troydebie)\ **Post date:** [December 22, 2020, 8:23pm UTC](https://forums.wyze.com/t/wyze-thermostat-black-screen-wiring-troubleshooting/150258/2 "2020-12-22T20:23:45Z")
![pre wiring](https://us1.discourse-cdn.com/wyze/original/3X/0/8/08d8b53c60716fb4afa7f78d1791a68f3d0fedda.jpeg) ---
**Author:** ![troydebie](https://avatars.discourse-cdn.com/v4/letter/t/8e7dd6/32.png) [@troydebie](https://forums.wyze.com/u/troydebie)\ **Post date:** [December 22, 2020, 8:24pm UTC](https://forums.wyze.com/t/wyze-thermostat-black-screen-wiring-troubleshooting/150258/3 "2020-12-22T20:24:19Z")
Post wiring pics: ![post wiring 2](https://us1.discourse-cdn.com/wyze/original/3X/7/a/7ab97563fa95b4c2257557de51c51eabbabc4e66.jpeg) ---
**Author:** ![troydebie](https://avatars.discourse-cdn.com/v4/letter/t/8e7dd6/32.png) [@troydebie](https://forums.wyze.com/u/troydebie)\ **Post date:** [December 22, 2020, 8:24pm UTC](https://forums.wyze.com/t/wyze-thermostat-black-screen-wiring-troubleshooting/150258/4 "2020-12-22T20:24:55Z")
![post wiring](https://us1.discourse-cdn.com/wyze/original/3X/e/9/e9eece61f4c8e395c205bfa7a73f428efa5d3cb2.jpeg) ---
**Author:** ![troydebie](https://avatars.discourse-cdn.com/v4/letter/t/8e7dd6/32.png) [@troydebie](https://forums.wyze.com/u/troydebie)\ **Post date:** [December 22, 2020, 9:48pm UTC](https://forums.wyze.com/t/wyze-thermostat-black-screen-wiring-troubleshooting/150258/5 "2020-12-22T21:48:15Z")
I have an unused blue wire between the thermostat and control board. Should I use that for the C and not use the extra Controller? Or do I need to hook the extra yellow on the control board before the controller as well?Thanks. ---
**Author:** ![Chuan](https://avatars.discourse-cdn.com/v4/letter/c/4da419/32.png) [@Chuan](https://forums.wyze.com/u/Chuan)\ **Post date:** [December 23, 2020, 2:11am UTC](https://forums.wyze.com/t/wyze-thermostat-black-screen-wiring-troubleshooting/150258/6 "2020-12-23T02:11:29Z")
yes you can link your used wire on C terminal of the control board and the thermostat, then install again, tell the app you have new C wire. However, our C -wire adapter is basically doing the same thing…I would suggest to using the C-wire adapter. Best, Chuan ---
**Author:** ![troydebie](https://avatars.discourse-cdn.com/v4/letter/t/8e7dd6/32.png) [@troydebie](https://forums.wyze.com/u/troydebie)\ **Post date:** [December 23, 2020, 2:46am UTC](https://forums.wyze.com/t/wyze-thermostat-black-screen-wiring-troubleshooting/150258/7 "2020-12-23T02:46:44Z")
Okay, I would rather use the Wyze adapter. Am I missing a step or connection to get the Wyze thermostat screen to turn on? The backlight turns on when I touch it or get close, but nothing shows up on the screen. It is controlling the system fine through the app. ---
**Author:** ![troydebie](https://avatars.discourse-cdn.com/v4/letter/t/8e7dd6/32.png) [@troydebie](https://forums.wyze.com/u/troydebie)\ **Post date:** [December 23, 2020, 8:03pm UTC](https://forums.wyze.com/t/wyze-thermostat-black-screen-wiring-troubleshooting/150258/8 "2020-12-23T20:03:42Z")
I attempted a fix: deleted the Wyze C adapter and wired the control board back how it was. I used the blue wire that was not used on the control board at C. At the Wyze thermostat I moved the green wire from C to G and the new blue wire to C. Turned the system on and the AC and furnace turned on together. Still a black screen on the Wyze thermostat both ways. I can still control the Wyze thermostat through the app, but nothing has shown on the screen. Did I miss a step with not uninstalling the thermostat from the app and reinstalling it? The screen still was black. Any help please and thank you! ---
**Author:** ![troydebie](https://avatars.discourse-cdn.com/v4/letter/t/8e7dd6/32.png) [@troydebie](https://forums.wyze.com/u/troydebie)\ **Post date:** [December 23, 2020, 11:45pm UTC](https://forums.wyze.com/t/wyze-thermostat-black-screen-wiring-troubleshooting/150258/9 "2020-12-23T23:45:59Z")
Now I tried to redo the whole install. I deleted the Wyze thermostat from the app, I am trying to add it again and the Bluetooth isn’t connecting. I don’t think the factory reset is working. Holding the button down for 10 seconds. I have tried every way to do this and it is not working. ---
**Author:** ![Brlepage](https://sea2.discourse-cdn.com/wyze/user_avatar/forums.wyze.com/brlepage/32/21184_2.png) [@Brlepage](https://forums.wyze.com/u/Brlepage)\ **Post date:** [December 24, 2020, 12:46am UTC](https://forums.wyze.com/t/wyze-thermostat-black-screen-wiring-troubleshooting/150258/10 "2020-12-24T00:46:25Z")
> [@troydebie](#): > > The backlight turns on when I touch it or get close, but nothing shows up on the screen. It is controlling the system fine through the app. This is sounds a defective unit if you can control it in the app, but not on the thermostat. @Chuan do you agree? Try holding the button down for ten seconds to factory reset and see if you can get it back in the app. If you can, check to see if you can update the firmware. If you can’t **You _may_ want to contact Wyze Customer Support about this issue!** By phone: (206) 339-9646 **Available Monday - Friday 5 am - 6 pm PT and Saturday 8 am - 4 pm PT** Or online: [Wyze.com/support](http://wyze.com/support) _phone support is typically faster however this isn’t always true due to fluctuation in the amount of calls._ Support will also be off for the holidays, so plan accordingly. ---
**Author:** ![troydebie](https://avatars.discourse-cdn.com/v4/letter/t/8e7dd6/32.png) [@troydebie](https://forums.wyze.com/u/troydebie)\ **Post date:** [December 24, 2020, 1:02am UTC](https://forums.wyze.com/t/wyze-thermostat-black-screen-wiring-troubleshooting/150258/11 "2020-12-24T01:02:37Z")
It did let me install the updated firmware when I originally installed it. However now the factory reset does not work at all. The screen remains black and I had to revert back to the old thermostat to get heat to work tonight, since it won’t let me add the Wyze thermostat to the Wyze app without the factory reset. ---
**Author:** ![Brlepage](https://sea2.discourse-cdn.com/wyze/user_avatar/forums.wyze.com/brlepage/32/21184_2.png) [@Brlepage](https://forums.wyze.com/u/Brlepage)\ **Post date:** [December 24, 2020, 1:14am UTC](https://forums.wyze.com/t/wyze-thermostat-black-screen-wiring-troubleshooting/150258/12 "2020-12-24T01:14:54Z")
I’d contact support with the above information. You may need to wait a bit if you can’t call tonight because they’re off for the rest of this week and next week for the holidays. ---
**Author:** ![troydebie](https://avatars.discourse-cdn.com/v4/letter/t/8e7dd6/32.png) [@troydebie](https://forums.wyze.com/u/troydebie)\ **Post date:** [December 24, 2020, 1:15am UTC](https://forums.wyze.com/t/wyze-thermostat-black-screen-wiring-troubleshooting/150258/13 "2020-12-24T01:15:17Z")
Thank you! ---
**Author:** ![ilko59](https://avatars.discourse-cdn.com/v4/letter/i/ecb155/32.png) [@ilko59](https://forums.wyze.com/u/ilko59)\ **Post date:** [August 30, 2022, 9:16pm UTC](https://forums.wyze.com/t/wyze-thermostat-black-screen-wiring-troubleshooting/150258/14 "2022-08-30T21:16:31Z")
Hello, I have a similar to this issue with my Wyze thermostat. I was wondering if you were able to fix the issue, and if so, what did you do for that? ---
**Author:** ![troydebie](https://avatars.discourse-cdn.com/v4/letter/t/8e7dd6/32.png) [@troydebie](https://forums.wyze.com/u/troydebie)\ **Post date:** [August 31, 2022, 6:28pm UTC](https://forums.wyze.com/t/wyze-thermostat-black-screen-wiring-troubleshooting/150258/15 "2022-08-31T18:28:14Z")
I had a defective unit and had to send it back to Wyze and they shipped me a new one and it worked perfect. ---
**Author:** ![ilko59](https://avatars.discourse-cdn.com/v4/letter/i/ecb155/32.png) [@ilko59](https://forums.wyze.com/u/ilko59)\ **Post date:** [August 31, 2022, 6:49pm UTC](https://forums.wyze.com/t/wyze-thermostat-black-screen-wiring-troubleshooting/150258/16 "2022-08-31T18:49:47Z")
Thank you, troydebie, I contacted the support and they also suggested that my unit is defective and will be sending me a replacement.