It could be the motor speed windings are bad for higher speed or switch/controller needs to be replaced
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 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: how do i charge a AMANA Ptac with R22 freon
Also, if you get caught working on ANY freon based refrigeration without a license, you could face a large fine. Freon isn't $3 per pound anymore, it's quite expensive and you don't want any of it wasted. Have a licensed technician do the work. He will know exactly how much refrigerant your system needs, and he can remove what's there and add to it.
SOURCE: my Amana Confort Zone ptac unit with model number
there is a drain plug inside unit.pull unit out of hole and look down to right side of unit in the drain pan you will see a plastic drain port knock it out and the unit will drain
SOURCE: amana PTAC will cool but fan will not go up in speed
Change the thermostat wire , if not change your board.
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