Troubleshoot ptac units

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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It sounds like your PTAC (packaged terminal air conditioner) unit is malfunctioning. When the thermostat is set to heating mode, the PTAC should be blowing warm air, not cold air. There are a few possible causes for this issue:

1. The PTAC may be low on refrigerant. If the unit is low on refrigerant, it may not be able to properly heat the air.
2. The PTAC's reversing valve may be stuck in the cooling position. The reversing valve is responsible for switching the flow of refrigerant between heating and cooling mode. If it is stuck in the cooling position, the PTAC will blow cold air even when the thermostat is set to heating mode.
3. The PTAC's heating element may be malfunctioning. If the heating element is not functioning properly, the PTAC will not be able to heat the air.

I recommend contacting a trained HVAC technician to diagnose and fix the issue with your PTAC. They will be able to determine the cause of the problem and repair it properly.

Unplug the unit and clean the filter. The error code should clear

Does the unit cool ok? If yes, you likely have a problem with reversing valve. If no, likely a refrigerant problem.

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

check to see if the compressor on the outdoor unit is running, if so it could possibly have a refrigerant leak or faulty 4 way valve

Could be that the t-stat is simply wired incorrectly. It needs to operate the reversing valve. The manual will explain when the reversing valve is to be engaged ( either in "cooling mode" or "heating mode"). Or it can be a more complex issue, such as reversing valve failure.

sounds like a baad capacitor or fan motor.

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Low Cost PTAC Curtain Air Deflector From RoomAire Works On All PTAC...

I found a few on line. You can propbaly find more choices. Do a web search for "Friedrich 42" PTAC air deflectors".

If this is a heat pump unit, the defrost thermostat may be stuck closed

HI, Take a look on amazon, here: Amazon com sanyo hvac parts. Wish you best of luck. Robert