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Jul 3, 2024
7:58
:40
am
Chemish
All-American
I was able to disconnect the wall unit and charge that with the USB. So, I'm getting the display now. But it's still
sing E74: no power to RH wire. The RH wire seems to be connected fine, however.
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Chemish
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Chemish
Joined
Jul 23, 2003
Last login
Oct 4, 2024
Total posts
10,146 (175 FO)
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Messages
Author
Time
Need help troubleshooting my Nest thermostat not working. In the app it says "can't connect to wifi since it isn't
Chemish
All-American
Jul 3, 4:42am
GFI outlet or breaker?
WDaddy
Jul 3, 4:47am
No breaker switches are flipped. I flipped the AC breaker off and on just to see if that would do anything. It didn't.
Chemish
Jul 3, 5:04am
Do you have your old thermostats stashed in a drawer? Maybe reattach those and see if you can get it to work. Stop gap
WDaddy
Jul 3, 5:13am
I'm pretty sure we do. Whether I'll be able to figure out how to reconnect it is another story.
Chemish
Jul 3, 5:22am
Can you disconnect the thermostat to restart them?
SWKTNative
Jul 3, 4:55am
You can pull them off the wall. The wires seem to be connected fine. But it would be weird if both thermostats had wire
Chemish
Jul 3, 5:09am
I agree. I'm just thinking maybe a restart to both devices would help flush out
SWKTNative
Jul 3, 6:07am
You can charge them via usb. They should be getting power from the furnace but it’s a vampire charge not a dedicated
LaserCoug
Jul 3, 5:56am
This is the correct answer. I’ve had this happen
DavisCoCoug
Jul 3, 7:38am
I was able to disconnect the wall unit and charge that with the USB. So, I'm getting the display now. But it's still
Chemish
Jul 3, 7:58am
Charge the head unit fully with USB
DavisCoCoug
Jul 3, 8:25am
Check the fuse on the furnace.
byubryce
Jul 3, 5:57am
I went up to the attic to check the furnace. I'm sure there must be a fuse there but I certainly couldn't find it.
Chemish
Jul 3, 6:53am
Take off the panel. It’s a small rectangle with a number on it. Most like 5.
byubryce
Jul 3, 8:01am
Question - what happens to your HVAC operations when you lose internet service?
Acorn
Jul 3, 6:48am
They've always continued to work even if we lose internet
Chemish
Jul 3, 6:51am
So the internet connection is more about making changes than operating?
Acorn
Jul 3, 6:54am
Yes
ryebrye
Jul 3, 6:55am
Are the thermostats connected to separate HVAC/furnish units?
oilman
Jul 3, 7:25am
I've seen two thermostats on one unit before. Usually the second thermostat controls a damper to let air through that
WDaddy
Jul 3, 7:53am
I need this to force more air into the master bedroom at night.
oilman
Jul 3, 10:50am
Yeah, it's one AC unit but it's split for upstairs and downstairs
Chemish
Jul 3, 11:01am
Ended up being a loose wire in a panel board in the attic. So, $79 later is running again.
Chemish
Jul 3, 10:18am
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