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Upper lamp 3-time blink

Upper OPERATION INDICATOR lamp blinks 3 times — Indoor fan motor trouble

Mitsubishi Electric · MSZ-AY Air Conditioners

What does Upper lamp 3-time blink mean?

The upper lamp on the indoor unit blinks 3 times. This indicates a problem with the indoor fan motor, which circulates air within the room.

Common Causes

  • Malfunction of the indoor fan motor

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check for any obstructions that might be preventing the indoor fan from rotating freely.

  2. 2

    Turn off the unit's main power supply, wait a few minutes, then turn it back on to attempt a reset.

  3. 3

    If the error persists, contact a service technician to check the indoor fan motor.

Browse all codes in this manual (43)
Verified technical data. Last updated: April 2026

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Source: Mitsubishi Electric MSZ-AY Air Conditioners
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