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R
rporterAug 3, 2025
What to do if the OPERATION INDICATOR lamp on my Mitsubishi Electric Air Conditioner is flashing?
- UusmithAug 3, 2025
If the OPERATION INDICATOR lamp on your Mitsubishi Electric Air Conditioner's indoor unit is flashing, it could be due to several reasons: a problem with the room temperature or indoor coil thermistor (check them, referring to 'Test point diagram and voltage' on page 49), an issue with the indoor fan motor (refer to 'Check of indoor fan motor' on page 44), a problem with the thermistor in the outdoor unit (refer to 'Check of outdoor thermistor' on page 48), or a trouble with the serial signal (refer to 'How to check mis-wiring and serial signal error (When outdoor unit doesn't operate)').
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