thermostat suddenly not working. any ideas?

Toggle sidebar Toggle sidebar
xanis

xanis

Lifer
Sep 11, 2005
17,571
8
0
Be aware this thread is 7 years old.
admin allisolm



EDIT: FIXED!

Fixed the problem... such a stupid thing.

Turns out that the main access panel on the unit itself came open. One of the latches that locks it closed came loose and the panel opened up, automatically shutting everything off.

:$

---

About two days ago, the thermostat in my apartment stopped working. We hardly ever touch it (we keep it on "auto" on the same temperature 99% of the time), so I'm not sure what's going on.

Any suggestions for what could have caused this? I'm going to call my landlord about it, but I wanted to see if there were any possible fixes that I could do myself and avoid having to wait for him to get down here.

UPDATE: Pics and Model #

Thermostat is a Trane XT300C.

https://lh3.googleusercontent.com/_tJiFBSZrT8I/TXPSCSlK3pI/AAAAAAAAABw/RnDual4qNkA/s720/DSC00015.JPG
https://lh5.googleusercontent.com/_tJiFBSZrT8I/TXPSDn9Tx_I/AAAAAAAAAB4/qWYEmonbhOo/s720/DSC00016.JPG
https://lh4.googleusercontent.com/_tJiFBSZrT8I/TXPSDk6O_oI/AAAAAAAAAB8/H0MWacqTR_E/s720/DSC00017.JPG
https://lh3.googleusercontent.com/_tJiFBSZrT8I/TXPSH7JU4EI/AAAAAAAAACE/1HGgg69YqHc/s720/DSC00020.JPG
 
Last edited by a moderator:
Bignate603

Bignate603

Lifer
Sep 5, 2000
13,897
1
0
Mine has a battery in it that needs to be replaced every year or two. You have to pop it open to get to it.
 
BoomerD

BoomerD

No Lifer
Feb 26, 2006
65,626
14,015
146
In an apartment? Call the landlord. It's their property, let them fix it.
 
xanis

xanis

Lifer
Sep 11, 2005
17,571
8
0
amdskip said:
Stuff doesn't last forever, have him replace it. Easy to do.
Click to expand...

Yeah. Landlord is coming Tuesday morning, I just wanted to see if the minds of ATOT had any solutions so that I didn't have to wait until then.
 
R

richardycc

Diamond Member
Apr 29, 2001
5,719
1
81
the breaker tripped, it's not even getting the 24v from the unit.

tighten the R and W, looks like honeywell is the oem of this thermostat, T6800D.

http://customer.honeywell.com/techlit/pdf/69-0000s/69-1409.pdf <-- this one has a better troubleshooting guide and self test info, not sure if the Trane one might be crippled. I think you just need to get power to the thermostat.
 
Last edited:
V

Vette73

Lifer
Jul 5, 2000
21,503
9
0
Tuesday? WTF is that.

Tell him to go to lowes; spend $30 and get a new one and install in 10minutes and be done.
 
bruceb

bruceb

Diamond Member
Aug 20, 2004
8,874
111
106
Owner's guide in .pdf is here

http://www.trane.com/Residential/Downloads/Manuals/Thermostats/TAYSTAT302C.pdf

Unit gets it's power from the 24VAC furnace circuit. Circuit breaker may be off, power switch at furnace may be off, Thermostat has an internal fuse which may be bad. If you have a digital volt meter, check for 24VAC at the wires coming into the thermostat. If you have it, it is either the internal fuse or the unit just up and died.
 
xanis

xanis

Lifer
Sep 11, 2005
17,571
8
0
Fixed the problem... such a stupid thing.

Turns out that the main access panel on the unit itself came open. One of the latches that locks it closed came loose and the panel opened up, automatically shutting everything off.

:$
 
Skitzer

Skitzer

Diamond Member
Mar 20, 2000
4,414
3
81
xanis said:
Fixed the problem... such a stupid thing.

Turns out that the main access panel on the unit itself came open. One of the latches that locks it closed came loose and the panel opened up, automatically shutting everything off.

:$
Click to expand...

That's what I thought
 
  • Like
Reactions: KAREN N
schneiderguy

schneiderguy

Lifer
Jun 26, 2006
10,801
89
91
mouse.jpg


theres a mouse in your thermostat
 
K

KAREN N

Junior Member
Jan 10, 2018
1
0
1
Thank you so much for this . I have been freezing for two weeks. The trouble shooting instructions in the thermastat manual had convinced me it was a wiring issue in my 60 year old home. Never suggested there was a safety shutoff at the main unit. Having a repair man come out would of cost hundreds of dollars, when all I had to do is turn a plastic nut on the heater panel a tiny bit and power returned. Thank you, thank you, thank you! It is warm in my home again.
 
Mayne

Mayne

Diamond Member
Apr 13, 2014
8,838
1,373
126
Nothing worse than telling the customer you need to replace the batteries...how do you justify a 90 dollar call-out charge? very awkward.
 
lxskllr

lxskllr

No Lifer
Nov 30, 2004
59,098
9,533
126
Mayne said:
Nothing worse than telling the customer you need to replace the batteries...how do you justify a 90 dollar call-out charge? very awkward.
Click to expand...
"I had to replace the power supply"

You're welcome
 
E

Exterous

Super Moderator
Jun 20, 2006
20,553
3,713
126
Mayne said:
Nothing worse than telling the customer you need to replace the batteries...how do you justify a 90 dollar call-out charge? very awkward.
Click to expand...

A good hvac person would suggest that when the service call is scheduled with the customer. ;)
 
You must log in or register to reply here.

TRENDING THREADS

COMPANY
RESOURCES
FOLLOW
Top Bottom