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Steam escapes during COOL operation

Steam escapes during COOL operation — High room temperature and humidity

MHI · Air Conditioning

What does Steam escapes during COOL operation mean?

It is possible to see some steam escaping from the unit during cooling. This typically happens when the room's temperature and humidity levels are very high.

Common Causes

  • Very high room temperature and humidity levels.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Do not be alarmed, this is a normal phenomenon under these conditions.

  2. 2

    Continue operating the unit; the steam will disappear as the room temperature and humidity decrease.

  3. 3

    Ensure windows and doors are closed to help the unit reduce room humidity more effectively.

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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