Some thermostats may also control a heater and as a result will have three terminals.
Amana ptac heater not working.
If anything is not working you will now know which part is bad.
I have an amana ptac in my shop model pth153b50am.
To determine if the thermostat is defective set the air conditioner to cooling and then use a multimeter to test the thermostat for continuity.
Amana ptac units can often be repaired if the issue is electrical.
If you do have power then you have an issue with your heating coil.
Some thermostats may also control a heater and as a result will have three terminals.
Check for wiring and piping errors in the connection between the indoor unit and outdoor unit.
Check for thermistor detection errors.
All lights turn on and low heat mode begins.
If the thermostat does not have continuity while the air conditioner is set to cooling replace the thermostat.
If you are ever having trouble with an amana ptac a quick reset might be the easiest way to fix the problem.
As of about a month ago the heating module of this unit does not seem to be working it only blows cold air on heat regardless of the temperature settings.
To determine if the thermostat is defective set the air conditioner to cooling and then use a multimeter to test the thermostat for continuity.
If the compressor fails outside of the 5 year warranty period it is often better to replace the unit.
If the thermostat does not have continuity while the air conditioner is set to cooling replace the thermostat.
If you do not see voltage then you have an issue with your controller board.
Unhook those 2 cables for the heater and run an ohms test.
It starts heating the inside fan turns the unit is set on 90.
The unit operates but does not cool or does not heat.
After a few minutes the heater turns of but the inside fan keeps turning and normal cold not heated air comes out.
Amana packaged terminal air conditioner units are known for their reliability but as with any product things can go wrong.
Now if you want to test the heating coil just shut off the unit and unplug it from the wall.
After a few minutes the heater starts again for a while and stops again it keeps doing that the room stays cold.
Ptac 2 amana pth123e35axxxab.