Trane Wrong Temp After Power Outage

Other Devices & Integrations Climate Control & Temperature Sensors
#1

I’ve tried to search around but can’t find the answer to this one.

I had a power outage today and one of my Trane thermostats reports the temperature as -1 degrees (it’s about 70 in the room right now). The other Trane thermostat is fine.

I tried removing the Trane thermostat from the wall and reattaching it to power cycle it but no luck - still -1 degrees.

Has anyone seen anything like this, or is there a more thorough way to reset a Trane thermostat?

#2

Mine is -9 degrees off after power outage. Mine is the TH8320U1040 Trane/Honeywell with the green screen. I can get into the settings section but do not know which line item sets the Offset of the Temp.
I’ve pulled the unit for the wall, changed out battery & also did a hard reset.

120 20
130 13
140 5
150 2
160 4
170 8
180 0
0220 3
0230 3
0240 5
0250 5
0280 1
0300 1
0310 3
0320 0
0330 1
0340 0
0500 0
0510 0
0530 1
0540 4
0580 5
0600 90
0610 50
0640 12
0660 0
0670 0
0680 2
0690 2
0700 0
0710 0

#3

Found that 700 changes the Temp display offset

0 = No offset
[Other options: -3, -2, -1, 1, 2, 3?F (-1.5?C to 1.5?C)]

http://s3.pexsupply.com/product_files/TH8320U1008-Pocket-Guide.pdf

#4

Unfortunately I don’t think this is an offset issue - the temp constantly reads “-1” in Vera and “1” on the front panel no matter what temperature the room is at.

I have an email into Trane support - my guess is that unless there is some kind of hard reset I’m not doing I will probably need a new thermostat.

#5

I see what you mean now, if the rest didn’t restore it, the Sensor is shot, looks like a new thermostat.

Fred

#6

Had something similar with about a 5F offset suddenly. Schlage replaced it quite fast after sending a request with what happened. They sent a replacement and followed that with a mailer to return the thermostat, postage prepaid. Pretty good service.