How to Fix / Troubleshooting

Safety first: Unplug the unit or turn off the breaker before accessing sensors or the control board.

Steps to correct continuous running:

Verify settings: Ensure the set temperature is not unrealistically low and that the mode is correct (Cool vs. Fan).
Check sensor location: Confirm the room thermistor is in the return air path, not buried in insulation or touching the coil.
Test thermistor: Measure resistance and compare to the temperature chart. Replace if out of spec.
Inspect control board: If the compressor relay is stuck closed (compressor runs even with power button off), replace the main control board.

Do not attempt to manually pry open relays; replace the board to ensure safe operation.

Amana air conditioner runs continuously and does not shut off even when the room feels cold.

Possible Causes