Gree Air Conditioner

Gree AC E9 error

Drain / water overflow protection

You can usually fix itReported by one source — verify

Most people can clear this with the simple steps below.

We found this meaning in only one secondary source. Confirm it with your user manual or brand customer care before any repair.

What it means

Water is not draining from the indoor unit, so the float switch stopped the AC to prevent leakage.

Common causes

Drain pipe blocked by dust or algae
Drain pipe bent or sloping upwards
Faulty drain pump or float switch (cassette units)

Try this at home first

Tick each step as you go

Switch off
Check the drain pipe outside is not blocked or bent
Gently clear the pipe end, then restart

When to call a technician

If it repeats, a technician should clean the drain tray and check the pump / float switch.

Safety first

Always switch off at the wall socket or MCB before touching any part. Do not open the outdoor unit, control boards or gas pipes yourself — they carry high voltage and pressure.

Frequently asked questions

What does E9 mean on a Gree Air Conditioner?

Drain / water overflow protection. Water is not draining from the indoor unit, so the float switch stopped the AC to prevent leakage.

Can I fix Gree Air Conditioner error E9 myself?

Usually yes. Start with: Switch off.

Is it safe to keep using the Air Conditioner with E9?

Yes, once the cause is fixed.

Other Gree AC codes

All Gree Air Conditioner error codes

Same code on other brands

E9 Memory (EEPROM) error — control boardBlue Star AC E9 High pressure / overload protectionHaier AC E9 Water leak detectedIFB Washing Machine E09 Heating faultBosch Dishwasher

Sources

We write every explanation in our own words from these references.

Last checked: 2026-10-20