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RUN light is on during DRY operation, no airflow

RUN light is on during DRY operation — Indoor fan stopped to prevent re-evaporation

MHI · Air Conditioning

What does RUN light is on during DRY operation, no airflow mean?

During DRY (dehumidification) operation, the indoor fan may stop. This is a normal function designed to prevent previously dehumidified moisture from re-evaporating and to save energy.

Common Causes

  • Normal operation to prevent re-evaporation of moisture.
  • Energy-saving function activated during DRY mode.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Do not be alarmed, this is a normal operating condition for the DRY mode.

  2. 2

    Allow the unit to continue its operation; the fan will resume when appropriate.

  3. 3

    Verify that the DRY mode is intentionally selected if continuous airflow is expected.

Browse all codes in this manual (124)
Verified technical data. Last updated: April 2026

Related Faults

00Outdoor Board LED only green lights up after startup - No outdoor unit of address 0 / Remote controller transmission wire open1OPERATION INDICATOR lamp blinks 1 time (Pattern A) - Indoor/outdoor unit communication error (Transmitting error - Outdoor unit)14OPERATION INDICATOR lamp blinks 14 times (Pattern A) - Other errors
Source: MHI Air Conditioning
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