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Low outside temp operation

Outdoor fan slows or stops — Low outside temperature operation active

Mitsubishi Electric · MSZ-AY Air Conditioners

What does Low outside temp operation mean?

The air conditioner has initiated low outside temperature operation. In this mode, the outdoor fan's speed is reduced or it stops entirely when the outdoor temperature drops to a certain level.

Common Causes

  • Low outdoor ambient temperature detected by the unit.
  • Automatic function to protect the outdoor unit and maintain efficient operation.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Allow the unit to continue operating as this is a normal, automatic function.

  2. 2

    Ensure there are no obstructions around the outdoor unit blocking airflow.

  3. 3

    Check if the unit is set to an appropriate mode (e.g., heating) for the current outdoor temperature.

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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