Vent! I hate my honeywell programmable thermostat!

Is yours the programmable version? Try going through the app and set the daily program. I bet that's what's happening is the program is kicking in. Mine seems to override my permanent hold and go to program, which is annoying.

link to the Wi-Fi version

it is less than $100 and you can change the temp from literally anywhere you have an Internet connection (anyplace your phone gets a signal). 

It is also very easy to install - we did it ourselves in less than 30 minutes.

We have a Honeywell (about 5 yrs old that replaced a 20 year old Honeywell). Are you making sure that you set the new temperature for each day of the week? That tripped me up in the beginning. But honestly, since it is 20 years old, I would just upgrade to a new model. They aren't very expensive, and are an easy installation.

We have one here at work and we have the guy who comes in each season to set it then tape it shut so no one else in the office can change anything - I feel your pain!

I can't seem to get things like that to work either! So I let my husband do it. He is an engineer, so is good with all that kind of stuff. But you are not alone. When it comes to the gps on my cell phone, I feel exactly the same. But I do enjoy my phone for texting/calling (since there are no pay phones anywhere it seems), so I can't smash it. But there have been many times I have wanted to!

My studio is on its own thermostat and its Honeywell. I HATE IT. I will get it set right, and we are good then BAM. Out of nowhere it starts changing the temperature. 

I think I will change it when we get back from our trip. I didnt realize it could be a honeywell issue and not just a 'I dont know how to use it' issue.

Ditch it and get a new model.

When we moved into this house it had a 14 yr old Honeywell programmable. I hated that thing from the very beginning. It was a bitch to schedule and the background lighting on it was dim. Ours was also programmed by the previous owners. We had to finally call a local electric repair company to try figure out how to reprogram it so it wouldn't go back to the old program. Even then, it would be glitchy and do some of the strangest things with the heating and air-conditioning.

We had just started investigating getting a NEST wireless, when our air conditioner went out. So we replaced the air conditioner and furnace and the thermostat. Best.thing.we.have.done.all.year. Mercy I love that new thermostat. App controlled thermostats are the best thing since sliced bread.

So just give up and replace it. Six years of ours giving us grief was so not worth it. I only wish I could have convinced my husband to have replaced it years ago.

Take it from one pregnant woman to another - ditch it and buy an Ecobee. I think mine reads my moods and adjusts accordingly lol!

When are you due by the way? I'm in late November. I can't remember if we were pregnant at the same time my first go round too. Do you have a 3.5yo?

We had a programmable one that came with this house when we bought it. I hated it with a passion. ugh. The next winter we had a furnace guy come out to check ours and while he was here I mentioned my hatred of that thermostat. He said "oh yeah, they can be tricky". lol. He replaced it with a nice old fashioned one that you turn up and down manually. We've had it ever since and have had no problems. 

I think I have the same model - you need to set all the days/times and then program the temperatures within those periods. I am not at home right now but if you want to peamail me, we could arrange a time to go over it step-by-step. LMK

Did you check YouTube? 

Be careful with Nest....we got one as a gift. It didn't like our heat pump even though Nest said it was compatible.  Middle of winter, our condenser was a block of ice.  We ditched it.