No heat my unit is a Amana model pth153b50aj the unit blows cold air what is the problem and the solution?

The cold that you describe may be just unconditioned air? If you are certain you can hear the comp operating for a couple of minutes, and then the heat starts, I would guess it is a reversing valve issue if it's a heat pump and it probably is. Or the control board acting up. I've had a lot of issues with the boards in the Amanda PTAC units. I can't remember how to configure it, but if you Google "Amanda ptac configuration", there is a lot of info online. May try a reset method first. Hope this helps!

Change motor to check do a amp draw find out how many amps motor is drawing this may tell you that motor is going

I'm sorry for the difficulties you're experiencing with the Amana Wall Heat Air Conditioner. I'll be glad to assist you with this. Could you please explain about the issue you're experiencing with the unit so that I can troubleshoot or provide the accurate solution?

Thanks for understanding.

This sounds like a freon problem your system probably has a leak in the system somewhere. Amana has tons of problems with there equipment. They make there coils paper thin and they split especially on a heatpump. Amana used to be a good brand and then got bought out by goodman manufacturing and have turned there product into ****. How old is this unit?

Verify all your components are operating - Compressor? Condenser fan motor? Blower fan motor?
If not check voltage to any that are not operating.
If all components are operating and the coils are clean - the refrigerant level is most likely low.

Yes. Heat pumps have to go into defrost just like a freezer when the temp gets too cold outside. The heat pump will temper the indoor air electric heat.

freon is low or outside is very cold

when is it the last time you cleaned the unit and changed the filters? it may be working good but you need to maintain the unit...clean all filters and see if you can vacum alll parts especially the condensing unit (you may need air pressure) can you move the unit to outside so you can clean it good? if you can use air or water pressur to clean it after you cover the lectrical parts. Good luck. (save your money this unit need cleaning only)

check to see if unit has a contactor,they arc and weld together,keeping your unit on

FAULTS ARE STORED WITHIN THE CIRCUIT BOARDS MEMORIE TRY UNPLUGGING IT FOR 2 MINUTES AND PLUGGING IT BACK IN