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Slight smell

Slight smell from air blown out

MHI · Air Conditioning

What does Slight smell mean?

Air blown out during operation has a slight smell. This is usually caused by tobacco or cosmetics adhering to the unit's filters or internal components, which are then recirculated with the air.

Common Causes

  • Tobacco or cosmetics adhering to the unit
  • Dirty air filters
  • Accumulated dust and debris inside the unit

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Clean or replace the air filters in the indoor unit regularly, as per the maintenance schedule.

  2. 2

    Perform the SELF CLEAN operation (if available) to clean the indoor coil.

  3. 3

    Ensure the room is well-ventilated, especially if there are sources of strong odors.

  4. 4

    Consider using a professional air conditioner cleaning service for a deeper internal clean.

  5. 5

    If the smell is persistent, strong, or chemical, contact your dealer for inspection.

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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