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Sensi (Emerson) wi-fi t-stat unreliable?


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01-08-18, 09:41 AM   #1  
Sensi (Emerson) wi-fi t-stat unreliable?

For a year I've had a Sensi Wi-Fi thermostat that I use as a basic t-stat. Original model, not the Touch version.
I don't use the Wi-Fi and the temp isn't programmed. It's on "Hold" 24/7.
Last week in the middle of a below-zero string of daily temps the house felt cold on 2 separate days. Both times I found the t-stat had changed to "COOL" mode so the temps were in free-fall.
The first time I just assumed someone had accidently changed it but at the 2nd occurrence I investigated and found 2 issues:
Low but not dead batteries.
No connection to the Wi-Fi due to a router change weeks ago.

What I want to know is can this t-stat work reliably as a basic control *without backup batteries and without a Wi-Fi network*? Any know reliability issues with Sensi?

(And no the power didn't go out either day to explain why it would reset)

 
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01-08-18, 11:03 AM   #2  
I don't know why it would have switched to cool but it does require the two AA memory batteries. There should be a battery level in the display.


~ Pete ~

 
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01-08-18, 08:09 PM   #3  
I can't trust a thermostat that can switch modes by itself.
I think I need to go way back to a mechanical one.

 
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01-08-18, 08:13 PM   #4  
Yes.... I do agree with you. Someone has tapped into your wifi frequencies.


~ Pete ~

 
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01-09-18, 06:58 AM   #5  
Pete I don't know if my thermostat needs a tinfoil hat...or you do

 
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01-12-18, 08:52 PM   #6  
Getting ready for bed & the house felt chilly so i checked. Yep 3 degrees below the setting and it set itself to "COOL" again.

 
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01-12-18, 09:03 PM   #7  
I was looking into this further and I found this.......

Sensi thermostat has a feature called Auto Mode, which allows the thermostat to switch from Heat to Cool, or Cool to Heat automatically. Auto Mode can only be enabled from the Sensi app. From the main screen of the app, tap the Mode icon in the lower left corner.


~ Pete ~

 
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01-14-18, 12:27 PM   #8  
It's never been on "Auto" to my knowledge. Even if it were--wouldn't it switch to "Cool" only if the temp exceeds the 75* "cool" setting? That isn't going to happen in the winter. Do i understand how it's supposed to work?

Seems clear to me this thing ain't right. I guess I'll try customer service & see if they'll replace it.

 
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