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E20 / 1(2) Red Flashes

E20 / 1 or 2 Red Flashes - Indoor fan motor rotation speed anomaly

Mitsubishi Heavy Industries · Air Conditioners

What does E20 / 1(2) Red Flashes mean?

The remote control displays E20, and the indoor unit's red LED flashes once or twice (while the green LED keeps flashing). This indicates an anomaly with the indoor fan motor's rotation speed.

Common Causes

  • A defective indoor fan motor
  • A defective indoor unit power PCB

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure nothing is obstructing the indoor fan blades or airflow (e.g., dirty filters).

  2. 2

    Turn off the air conditioner at the main power breaker, wait 30 seconds, and then turn it back on.

  3. 3

    If the fan motor still exhibits abnormal speed or fails to operate, contact a service technician for inspection or replacement of the fan motor or power PCB.

Browse all codes in this manual (110)
Verified technical data. Last updated: April 2026

Related Faults

01Power source faulty — RUN LED OFF, TIMER LED flashes 1 time05Wired remote control wiring error — RUN LED OFF, TIMER LED flashes 5 times35Cooling high pressure control activated — RUN LED flashes 3 times, TIMER LED flashes 5 times
Source: Mitsubishi Heavy Industries Air Conditioners
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