I'll see if I can find it. I had the manual, but I think the guy who initially installed it back in 2022 may have walked off with it. And I can't check with him because he is deceased and his one horse company is therefore defunct.

Do you have a clogged air filter?

My heat pump unit is in the attic, where I haven't been in over a decade. But I managed to locate the warranty paper, which had the model number and serial number. No, the air filter is not clogged. The thermostat reminds me when to change it.

The heating function has basically never worked well when it got cold enough, and I've basically always been convinced that the radiant heat panel is either not functioning at all or not functioning correctly. Everything else about the unit is great.

I think it was the only thing the guy that installed it could get during the pandemic. I have no idea if it's smart or not. What the person that came out and messed around with it wanted to do was install a very expensive Amana thermostat. However, he couldn't or wouldn't even show me a picture of it or direct me to the manual, and couldn't or wouldn't explain very well why that would fix my problem.

I finally tracked it down myself, sent him a picture, and he said that this one that I found was the thermostat that he proposed. I also found a really good price on it.

https://bosashop.com/products/goodman-comfortnet-ctk04-708979/?msclkid=3d4817b2296b181c8b8470237f26e62d

You can tell if the thermostat should work by the wires that attach to it, and if it supports 2 stage systems, which I believe your hvac is. If you pull the thermostat away from the wall and see the same wires, which are color coded, and they match the new thermostat wire leads, you should be good to go. Your fan should be set to auto, so it will not run all the time. The expensive thermostat from Amana called the Smart Thermostat, that supports the Comfort Bridge features, which your hvac has, is probably a good choice as well. The problems arise when someone has jumpered the wires on the control panel of your unit to allow a configuration to a different thermostat. If you live in RVA I know a guy. Good luck! If you need to you can send me a photo and my guy can tell you how to switch it out. It's pretty easy.

Yes, it is two stage. I am coming to regret that, since a lot of places don't want to work on it.

Unfortunately I'm in Texas. And I mean that "unfortunately" in more than one sense.

So if the wires in the wall match the thermostat it's good?

That great price on the Amana thermostat turned out to be something weird. The email bounced and the phone number just makes beeps. Oh well.

I looked for an installation manual for yours but first pass came up with nothing. Amana wants only techs to call as well, which is pretty crappy of Amana. You might call hvac supply houses in your area and ask what is compatible with your unit. They should have the reference materials. Some do retail sales.

we would get freezing or below freezing temps. This is when I learned that heat pumps do not work efficiently in cold weather. We suffered along for a few years and now that climate change is no longer in its infant stages and the desert is not subject to freezing temps there are no longer problems with the heat pump putting out heat.

That's why it has an auxiliary radiant heat panel. The thing that I'm convinced doesn't work right.

Well, maybe the problem isn't fixable then. I was assuming the heat panel would do the trick if it could be got to work right, because on my old unit the heat panel worked just as it was supposed to no matter how cold it got. As long as I was willing to pay for the electricity.