This has happened twice in the past two weeks and I can’t figure out why. In the history of the device, it just says “Mode Off” and stops heating.
I check the routines tab for the thermostat and it says “No Routines include this device.” And that’s correct. I don’t directly update it at all except in one of 5 scenes.
I have checked all 5 scenes and not one of them changes the thermostat mode. They only change the temperature.
It said it had 30% battery but just in case I replaced the batteries this morning.
Any ideas how to troubleshoot who or what triggered this mode change at 5:56 am this morning?
Might be a long shot, but by chance did you possibly agree to something w your utility company that allows them to mess with your usage? My utility offered something that sounded good, and rewarded me with a rebate…. But I found it to be a super pain, because they’d shut me off with a frequency, calling it “peak time conservation”
Our heat is oil so there’s no peak time for that… but also, I don’t think the electric company could gain access to my thermostat without my granting explicit API access, which I definitely have not done.
Do you use Alexa? If so, you might verify there are no routines or hunches that include your thermostat.
RBoy
(www.rboyapps.com - Making SmartThings Easy!)
5
Change the batteries.
Common issue with this thermostat, when the C-Wire cuts out (which happens with the HVAC circuit detects overheat when in heating mode - this is normal - or when it detects water during cooling), the CT-xxx models reset back to Off. Putting in a fresh set of batteries will provide the power to keep itself running with the C-Wire cuts out.
If this fixes the issue then you may also want you to look into why your C-Wire is cutting out, if it’s normal or not.
Old house, no C-Wire. However battery reported 30% so I replaced them 2 days ago (when I made the OP). So far so good. I’ll update if this doesn’t fix it.