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The thermostat has a differential built into the temperature sensing operation. The differential is normally a degree or more. If the stat shuts down at 72 degrees it should not start the unit again until the temperature in the room reaches 73. If the AC runs and cools properly until it shuts down, I would check the thermostat. The AC can not restart immediately after it shuts off because the pressures in the system are too high at the compressor. It takes a few minutes for the pressures equalize allowing the compressor to start. If the stat tells the unit to start under high pressure, the compressor will shut down on overload. It will start and run after the pressure falls enough for the compressor motor to run.
I think what you may be seeing FL , instead of E1. FL indicates that the water collection tank is full and needs to be emptied. That would coincide with the unit shutting OFF and not being able to restart it.
Turn the unit OFF and Unplug it, before draining the tank. Once the tank is drained and the unit is restarted it will revert back to cool at 77 degrees F. You can then restet the temperature to what you desire.
I hope this helps you and thanks for choosing FixYa.
Hi, The unit has a leak and is low on charge (freon) Find and fix leak, then vacuum and recharge...Leak is probably in flare fittings behind unit...
Here is a tip about troubleshooting your air conditioner... There are many things that can cause your air conditioner not to cool...
Most likely the terrible noise you hear is the compressor starting... Sometimes it is louder than when its runs continuous. Just make sure if the unit is shut off allow a few minutes for the freon to equalize before restarting the unit. Its possible that the Compressor is going out, But as long as it cools and the noise goes away after a minute or so, i wouldn't worry about it to much.
Does this happen just when you shut it off and try to restart it immediately? If so it is trying to start against pressure that has not been given time to balance out. If this happens at any time the unit tries to start it could be low voltage or a hard starting compressor. They make hard starting kits for this purpose.