Airwell Loss of Cooling Capacity / Refrigerant Undercharge

Indoor unit blows air but does not cool; room temperature does not drop even after long operation.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Refrigerant leak in indoor or outdoor coil, Blocked capillary or electronic expansion valve, Dirty condenser coil, Failing compressor

How to Fix / Troubleshooting

Safety: Do not attempt to open the refrigerant circuit. Always turn off power before removing covers.

Steps:

  • 1. Confirm mode and settings: Ensure the unit is set to Cool mode with a set temperature at least 3–5°C below room temperature and fan speed not on Fan Only.
  • 2. Check indoor airflow: Clean filters and ensure vents are not blocked.
  • 3. Inspect outdoor unit: Confirm the outdoor fan and compressor are running (you should hear the compressor and feel warm air from the outdoor fan).
  • 4. Clean outdoor coil: If the coil is dirty, gently clean it to improve heat rejection.
  • 5. Professional refrigerant check: If airflow is good and the outdoor unit runs but cooling is weak, a certified technician must check refrigerant charge, locate leaks, and repair them. Operating with low refrigerant can damage the compressor.
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Repair Difficulty

Professional Required 5/5

Required Part

Refrigerant Circuit (Compressor / Coils / Expansion Device)
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