Mitsubishi Electric · MSZ-AP Air Conditioners
The upper lamp of the indoor unit's Operation Indicator blinks twice in a pattern. This indicates a problem with either the room temperature thermistor or the indoor coil thermistor, which are critical for accurate temperature sensing.
Click steps to track your progress.
Turn OFF the main power supply to the air conditioner.
Ensure the indoor unit's air intake and output are not blocked by furniture or curtains, as this can affect temperature readings.
Verify that the remote controller's temperature setting is appropriate for the room.
Turn the main power supply back ON. If the problem persists, contact a qualified service technician to inspect and potentially replace the thermistors.