Good call - forgot to put that in the title. I'm trying to edit the post but keep getting a Page Not Found error as a result. Hopefully I can update soon!

You need a line voltage thermostat. However most line voltage thermostats are for heating only. My suggestion is to call Honeywell thermostat help line and ask them what current models would be good replacements. They should have a few programmable options.

Yeah called them once already bit might try again. they essentially said they don't support this thermostat any more.

Why do you think 120v? A photo would help.

here are some pictures

I think the Honeywell TB6575A1000 would work for your application. You have to carefully review the electrical specs of each to be sure. It has an auto change over feature so you should not have to do anything between winter and summer.

yeah I came across that - I'll give it a shot and see if I can get someone more knowledgeable to advise on correct wiring

Your thermostat is a simple switch. It is either connecting the heat terminal to ground if the room temperature is below the set temperature, or to the cool terminal to ground when the room temperature is above the set temperature. You have to find a line voltage thermostat that works the same way with similar electrical ratings.

I am surprised Honeywell does not have a direct replacement. There must be thousands of these types of thermostats installed in existing apartments.

haha agreed! I talked to one rep over there but I think he was having a bad day...will call them again to see if someone more knowledgeable can confirm your suggestion - thanks!

It may be possible to adapt your line voltage to 24v. Then you could use almost any modern thermostat. My wife loves telling our Nest thermostat what to do.

Basically any line voltage thermostat (typically for electric baseboard heat) will work, in your case the thermostat is just controlling a fan. Looks like Honeywell and White-Rogers offer digital versions, some with programming if you want it.

Certainly you could rewire things so that the thermostat controls a relay that flips the fan on/off but because you are in a condo, that would require the services of a licensed electrician and/or HVAC technician and probably approval from the board.

Most line voltage thermostats are heating only and won't as a replacement. Installing a 24 V thermostat is a possibility but not practical in my opinion. Adding relays and a 24 V power source will require a lot of additional wiring and expense.

Honeywell line voltage heat / cool

The Honeywell help line's response is kinda funny. They probably couldn't find it in their database because it's so old, and had no idea what it was, so all they could say is they 'don't support it anymore' which means 'we don't have the spec sheet on it and we can't fix them.' Which of course is not what you're asking for, you want a replacement.

I see you have one in the previous post, and now that you know what it's called, any HVAC contractor you ask can probably find and install one as well.

Hello Steven, Sorry to piggyback on your post but I'm having a similar situation except with a different Honeywell model. I also have an additional switch on the wall that is for the fan speed. I am trying to replace them with one unit - or, really, with anything that's not such an eye sore. Did you have any luck? Has anyone dealt with something like this before? Thanks

The top thermostat Atilla can be replaced with just about any combination heating cooling thermostat. The variable fan speed control is going to be more problematic. The Bohn-Aire fan control is archaic. Are you sure it is currently controlling anything?

Thanks, Ron! The fan speed control is actually still working...:) I ordered this new thermostat (https://www.amazon.com/gp/product/B0076OYTLY/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1) based on another discussion (https://www.doityourself.com/forum/thermostatic-controls/576434-replacing-honeywell-t651a-tstat-condo-fan-coil-system.html) and I hope it’ll work out. Once I got it and started the project, I’ll post the results here. Thanks again!

Did you guys find any replacements? working on a condo build 1979 also trying to figure out a replacement , any info would be appreciated!