Amana PTH153B50AM AC works, heat doesn't. Is there a reset?

Question edited for a lot more clarity.

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Probably this one. Talk to your installer.

https://www.amana-ptac.com/products/ptac/hec154j

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i'm not familiar with your specific unit but ..sounds like an electronic gas value has gone bad or has a bad connection when that happened to my friend it wasn't that expensive to have it fixed .. BYW it acted like this for a while then stopped working completely

switch issue.

yes it is fixable does the blower run? I would pull it out take it outside and wash with hose the outside coil and inside coil make sure you clean the outside coil real good on both sides. this may solve your problem.

Jane, what you really need is the Owners Manual for you discontinued model AC/Heat Pump.
Call Amana Customer Support 1-800-843-0304 and they can furnish you one. Either by email attachment or by snail mail.

Hope this helps you. Please let me know.

First unplug the unit......Take the front cover off, take the wire screen off where the front fan is there is 4 or 5 screws that hold the plate that was under the screen. The electric heating elements are under that plate between the evaporator coil and the front blower wheel. It will lift straight up and give you access to the elements. In the electric heating element area there is a limit switch with a red or black button in the center of it push it to reset the limit it is on the right hand side by the controls. I wish I could find a picture to show you but I couldn't find one. It is not easy to get to... Hope this helps.

Well, the solution is sort of a good news/bad news situation. It appears that the model number that you listed has been subject to a Safety Recall. This despite the fact, Amana no longer makes that specific model.

For further information and to make sure your specific model is included in that recall, go to
http://ptaccord.regcen2.com/

Keep temp 30 degree and mode button in " Heat" Wait for 3 minutes. still problem, check heater-element/RV/Heater sensor.

its on a lockout. there is a safety switch that is open do you have a multimeter? If not iside the furnace is a red reset push button if you push that chances are you had flame rollout and you need to call the experts that means either you have a cracked heat exchanger or a blocked or not working inducer

To getproper heat, keep your temp setting at 30+ degree and also mode in "heat "position.If still no heat, check your heating sensor for closed circuit by an OHMsmetre.It it's with RV, check power to RV