I have wired up my thermostat exactly as the previous one was wired, but the fan never turns off which results in cool air being blown through the house when the furnace stops heating, I’ve read through several other posts that have similar issues, but none of them seem to be the same as my issue. I’m sure it’s something to do with wiring. I didn’t touch the wiring on the furnace/AC at all since I already had a C wire. I’d be happy to post the pictures of the previous wiring and current wiring.
Yes, in order for anyone to help you should post a picture of your thermostat wiring and your furnace control board wiring. If you have a picture of your ‘before’ thermostat wiring that would help too.
My old thermostat only had an R, while the Wyze thermostat is separated into Rh and Rc. I only have the wire into Rc which is what the app told me to do when I installed it. I’ll see if I can get a picture of the control board. There are a lot of wires in there.
you need to share the image that shows where these wires get coupled to the thermostat wires. Don’t zoom in so much- show the entire inside of the furnace.
1 Like
I’ll try to when I get home. There’s a huge bundle of wires in there, but I’ll do what I can.
The white wire to C is connected to the black wire from the thermostat. There is a brown wire that goes to the humidifier unit I believe.
Hmm. if you go to the wyze app and swipe up from the thermostat page, is the fan set to auto or on?
Your wiring looks fine. Your thermostat might be faulty, or you might accidentally have the fan set to run all the time, or perhaps wyze expects that the humidifier requires the fan to be running?
The fan is set to auto. I think the issue might be the humidifier. The app shows the humidity is currently 26% but the minimum was set to 30%. I changed the minimum to 20% and it stopped running.
I’ve never had a system with a humidifier built in. I’m not sure where that issue might be.
Thanks for your help on this though. I wouldn’t have thought to look at the humidifier.
1 Like
Thank @speadie for helping out. The thermostat keeps using the fan to carry water content to your home so the humidity can be reached
I’m hoping to get @speadie opinion again. He seems to be the man for these types of questions.
Just had a furnace installed and am using the Wyze thermostat. I followed the app’s working recommendations, must just like the OP, my fan never kicks off. The furnace is throwing an error code E7_1 which, according to the manual, means the gas valve is energized when it should be off. I’m guessing the thermostat is sending voltage across something it shouldn’t be?
Photos of the thermostat and furnace wiring below
.
What is the exact model number for this furnace?
Does it happen even when the green wire is disconnected?
If it does, then there is likely an open / disconnected rollout switch or high limit.
If it stops happening when the green wire is disconnected, what wires did you tell the wyze that you had during setup?
If the wyze is calling for fan, it looks like your error code should be alternating with COF
1 Like
Thanks for the reply, @speadie. I just returned from being out of town. Currently, the thermostat is set to off and the fan is still running. I disconnected the green wire on the thermostat side and nothing changed.
The unit is a RunTru A951X060BU4SABB. The board is showing the code IDL_TP5_E7.1 I’ve attached the page that shows what the error 7.1 is:
I told Wyze I had Rc, Y1, G, W1, C
If I need to get my installer back, I will. I was just hoping it was something simple.
Try disconnecting the white wire from the thermostat. if that fixes the error, then your thermostat is constantly calling for heat for some reason. If it doesn’t fix the error, then you need to call in the tech.
2 Likes