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Gree Air Conditioner H1 Error Code
Defrosting (normal in heat mode) on Gree air conditioners.
GreeAll Gree air conditioner codes
Not a fault. In heating, ice builds up on the outdoor coil, and the system reverses for a few minutes to melt it. GREE says H1 is a status code for defrost or oil return in heating mode.
Compatible models
Any GREE heat pump in heating mode. GREE lists it as a status code rather than tying it to models.
Also shown as
No other codes are listed for this fault.
Difficulty
Most people can clear this one at home with simple checks.
Not sure you are reading the code right? See how to read Gree air conditioner codes.
How to fix Gree H1
Give it several minutes
The indoor fan may stop and you may see steam rising from the outdoor unit. That's normal. Heating resumes when the coil is clear.
Make sure meltwater can drain
Keep the area under the outdoor unit clear of snow and ice so defrost water can run away instead of refreezing.
When to call a technician
If H1 lasts far longer than usual or the outdoor coil stays caked in ice, GREE suggests a sensor or heat exchanger issue. Have a technician look at it.
Parts linked to H1
These are the parts most often behind this code. Tap one to see what it does and the signs it is failing.
- outdoor heat exchanger thermistor
- 4-way reversing valve
Order parts by your full model number so they fit.
Frequently asked questions
Which Gree models show the H1 code?
Any GREE heat pump in heating mode. GREE lists it as a status code rather than tying it to models.
Can I fix Gree H1 myself?
Usually, yes. Most H1 problems clear with simple checks you can do at home. Start with the first step above: give it several minutes.
Other Gree air conditioner codes
- E6Indoor and outdoor units can't communicate
- E1High pressure protection
- E3Low pressure protection
- E2Indoor coil freeze protection
- E5Over-current protection
- E7Mode conflict between indoor units
- E8High temperature protection from low indoor airflow
- E9Condensate overflow protection
- H6Indoor fan airflow fault
- L3Outdoor fan airflow fault
- F1Indoor room temperature sensor fault
- F2Indoor coil sensor fault
- F3Outdoor air temperature sensor fault
- F4Outdoor coil sensor fault
- F5Compressor discharge sensor fault
- H5Power module (IPM) protection
- C5Jumper cap missing or wrong
Last reviewed 2026-10-19. Codes and steps can vary by model; check your owner's manual.