You have a shorted unit. Check the compressors, condensing motors, and the indoor fan motor. Replace defective parts found from the unit.
It could be the compressor, motor is shorted or grounded.
SOURCE: ptac fan keeps blowing
Try setting the fan control to "AUTO" this will cause it to cut out with the compressor.
SOURCE: amana ptac shuts on and off constantly
your control board is shot and your ac can't tell the room is cold enough. 1-888-855-9987
SOURCE: Amana PTAC PTC093A35AA won't blow heat
The reset button is located behing a panel on the front of the unit that is labeled Heat Reset. If that label is gone then look around, it is a small hole, small enough for a paper clip to fit through.
That being said, I have 137 of these units in one of my hotels and have not had a single one needing to be reset. You probably are going to need a new control board kit. These can be purchased from Amana. They are $130. Make sure that you have pulled the heater coil out and inspected it first. Also, there was a recall years ago where Amana was supposed to contact and send out new voltage switches. These are the round black things that the Brown heater wires connect to on the upper and lower side of the heating coil. You should also try to replace those if you find the coil in good condition. I have had those resolve heating issues. Most of the heating issues were a result of a bad relay on the control board though.
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SOURCE: amana ptac- blows same temperature air whether its
Check to see if your compressor is running. Thre are 5/16 screws on either side of the unit holding it to the case. Take those out and you can get to the cpmpressor. These are not complicated units but you may have to have a service tech look at it for you. I do sell a lot of these PTAC units so if your compressor is running you have leak or bad compressor. Russ
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