Gree
Loss of Cooling Capacity / Refrigerant Circuit Fault
Indoor unit runs but no cooling; fan blows room-temperature air even after 10–15 minutes in COOL mode.
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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, Failed four-way reversing valve stuck in heating or neutral position (heat pump models), Blocked expansion valve, Compressor not starting or running at very low speed
How to Fix / Troubleshooting
Safety first: Do not attempt to open refrigerant lines. Compressor and refrigerant work require a licensed technician.
- Step 1 – Confirm settings: Ensure mode is set to COOL, temperature is set at least 3–5°C (5–9°F) below room temperature, and fan speed is not on FAN ONLY.
- Step 2 – Check outdoor unit operation: Go outside and verify that the outdoor fan and compressor are running (you should hear a deeper humming sound from the compressor). If only the fan runs or both are off, note this for the technician.
- Step 3 – Inspect for ice or frost: Look at the indoor coil (behind filters) and outdoor coil for ice buildup. Ice suggests low refrigerant or airflow problems.
- Step 4 – Look for oil stains: Check around flare joints and coils for oily residue indicating a leak.
- Step 5 – Call a technician: A professional must check pressures, locate leaks, test the four‑way valve (if heat pump), and verify compressor operation. They may replace the expansion valve, repair leaks, and recharge refrigerant.
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Repair Difficulty
Professional Required
5/5
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