Gree Split AC Error Code F9 — What It Means & How to Fix It

What Does This Error Mean?

F9 means the compressor is drawing dangerously high current and protection has triggered. The AC shuts down to prevent the compressor from burning out. This requires investigation — do not keep restarting without finding the cause.

Affected Models

Gree FAIRY Series
Gree LOMO Series
Gree U-MATCH Series
Gree PULAR Series
Gree Inverter Split System

Common Causes

Compressor starting to fail internally, drawing excess current under load
Locked rotor — compressor motor mechanically seized
Low supply voltage forcing abnormally high current draw
Extreme operating conditions creating excessive load on the compressor
Faulty current sensing circuit on the outdoor PCB

How to Fix It

Turn the AC off immediately and switch off at the circuit breaker.

F9 indicates the compressor is under severe electrical stress. Continuing to run it risks burning out the motor windings.
Wait 30 minutes for the compressor to cool down completely before any further action.

A thermal overload in the compressor may have tripped — it needs time to cool and reset before it will allow a restart attempt.
Try one carefully monitored restart. If F9 returns within a minute, switch off and do not retry.

One restart attempt is reasonable. Multiple rapid restarts with F9 active risk permanent compressor damage.
Check the supply voltage if possible. Very low voltage (below 200 V) can cause high current that triggers F9.

If supply voltage is the issue, an electrician needs to investigate — not running the AC on low voltage is critical.
Call a qualified technician. Mention F9 — they will bring current test equipment to assess the compressor.

A technician can measure actual compressor winding resistance and running current to determine if the compressor is failing.

When to Call a Professional

F9 is a serious fault that usually requires professional diagnosis. Compressor failure, locked rotor, and PCB faults all need a trained technician with test equipment. Do not repeatedly restart the unit — this can cause additional damage.

Frequently Asked Questions

Does F9 always mean the compressor needs to be replaced?

Not always — F9 can be caused by low voltage, extreme heat load, or a faulty current sensor. A technician will test the compressor directly to determine its condition. If the compressor is genuinely failing, replacement or unit upgrade is the only option.

What is a locked rotor and can it be fixed?

A locked rotor means the compressor motor has seized and cannot turn. This is usually caused by a seized bearing or internal mechanical failure. A locked rotor is not repairable — the compressor must be replaced.

Is F9 covered under warranty?

Gree warranties typically cover compressor faults for 5 years from installation. If your unit is within warranty and F9 is due to a compressor failure, the repair or replacement should be covered. Contact your installer or Gree directly with your installation date and model number.