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AIR PURIFYING lamp continuously blinking

AIR PURIFYING lamp continuously blinking — Air Purifying power control circuit out of order

Mitsubishi Electric · MSZ-AY Air Conditioners

What does AIR PURIFYING lamp continuously blinking mean?

When the AIR PURIFYING lamp continuously blinks, it indicates that the AIR PURIFYING power control circuit on the indoor electronic control P.C. board is malfunctioning. As a result, the air purifying operation will not be conducted.

Common Causes

  • Malfunction of the AIR PURIFYING power control circuit on the indoor electronic control P.C. board.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure the front panel of the unit is securely closed, as opening it will cut the AIR PURIFYING power.

  2. 2

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

  3. 3

    Contact a service technician to check the AIR PURIFYING power control circuit and the indoor electronic control P.C. board.

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

Related Faults

AIR PURIFYING lamp 2 blinksAIR PURIFYING lamp blinks 2 times — Front panel not firmly closed or interlock switch issueAIR PURIFYING lamp 2-time blinkAIR PURIFYING lamp blinks 2 times — Air Purifying device error (real-time)AIR PURIFYING lamp continuous blinkAIR PURIFYING lamp continuously blinks — Air purifying device dirty, wet, or malfunction
Source: Mitsubishi Electric MSZ-AY Air Conditioners
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