Gree is one of the world’s leading air conditioning brands, known for its energy-efficient and reliable cooling solutions. However, like any electronic device, Gree air conditioners can occasionally run into problems, displaying error codes to indicate specific issues.
Understanding these error codes saves time and money by helping you troubleshoot the problem before calling a technician. In this guide, we’ll cover all possible Gree Air Conditioner error codes, their meanings, and how to fix them.
Gree air conditioners display error codes on either:
✅ Indoor unit display panel
✅ Remote control screen
✅ Outdoor unit (for some models)
When an issue occurs, the unit will show an error code like E1, E6, F0, or H3, indicating a specific fault. Let’s break them all down below.
Indoor Unit Error Codes
| Error Code | Meaning | Troubleshooting Steps |
|---|---|---|
| E1 | High pressure protection | 1. Check for blocked airflow (dirty filters, closed vents). 2. Ensure condenser coils are clean. 3. Check refrigerant levels (call a technician if low). |
| E2 | Indoor unit anti-freezing protection | 1. Inspect the evaporator coil for ice. 2. Increase room temperature slightly. 3. Ensure proper airflow around the unit. |
| E3 | Low pressure protection | 1. Check for refrigerant leaks. 2. Clean clogged air filters. 3. Ensure proper outdoor unit ventilation. |
| E4 | Compressor discharge temperature too high | 1. Check airflow obstructions. 2. Ensure cooling mode is working correctly. 3. Call a technician if overheating persists. |
| E5 | Overload protection | 1. Reset the unit. 2. Check for electrical power fluctuations. 3. Reduce load (lower fan speed, increase temperature). |
| E6 | Communication failure (indoor & outdoor unit) | 1. Check cable connections between the indoor and outdoor unit. 2. Restart the AC. 3. If the error persists, contact a technician. |
| E7 | Mode conflict (heating & cooling simultaneously) | 1. Ensure only one mode (heating or cooling) is active. 2. Reset the unit. |
| E8 | Overheat protection | 1. Clean air filters and condenser coils. 2. Reduce direct sunlight exposure on the outdoor unit. 3. Let the unit cool down before restarting. |
Outdoor Unit Error Codes
| Error Code | Meaning | Troubleshooting Steps |
|---|---|---|
| F0 | Refrigerant leak or low refrigerant | 1. Check for visible leaks (call a professional for repair). 2. Ensure proper refrigerant charge. |
| F1 | Outdoor temperature sensor failure | 1. Inspect and replace the outdoor temperature sensor if faulty. |
| F2 | Condenser coil temperature sensor issue | 1. Check for dirty condenser coils and clean them. 2. Replace the temperature sensor if damaged. |
| F3 | Compressor discharge sensor failure | 1. Reset the system. 2. If the error persists, call a professional. |
| F4 | EEPROM error (outdoor unit) | 1. Power cycle the AC. 2. If the error remains, EEPROM may need reprogramming. |
| F5 | Outdoor fan motor failure | 1. Ensure the fan is free from obstructions. 2. If the motor isn’t running, it may need replacement. |
| F6 | Compressor overload protection | 1. Let the unit cool down. 2. Ensure ventilation is not blocked. 3. Check power supply for voltage fluctuations. |
Sensor-Related Error Codes
| Error Code | Meaning | Troubleshooting Steps |
|---|---|---|
| H1 | Defrost mode activated | No action needed – this is normal in winter conditions. |
| H2 | Indoor unit temperature sensor failure | 1. Check if the sensor is properly connected. 2. Replace the sensor if needed. |
| H3 | Compressor overheating | 1. Reduce unit load (lower fan speed). 2. Let the compressor cool down. |
| H4 | Overcurrent protection | 1. Check for power surges. 2. Reset the unit. |
| H5 | Drive Board Protection | 1. Call a technician for electrical board inspection. Schedule a professional repair here. |
Communication & Voltage Error Codes
| Error Code | Meaning | Troubleshooting Steps |
|---|---|---|
| P0 | IPM Module Protection | Requires professional repair. |
| P1 | Voltage fluctuation (overvoltage/undervoltage) | 1. Check for unstable power supply. 2. Use a voltage stabilizer if necessary. |
| P2 | Overcurrent protection | 1. Reduce AC load. 2. Ensure good airflow around the outdoor unit. |
| P3 | DC Voltage Issue | Call a technician – may require a board replacement. Book a professional repair here. |
| P4 | Inverter Compressor Error | 1. Reset the AC. 2. If the error persists, seek professional help. |
How to Reset a Gree Air Conditioner
If your AC displays an error code, try resetting it first:
1️⃣ Turn off the AC using the remote control
2️⃣ Unplug it from power (wait 5–10 minutes)
3️⃣ Plug it back in and restart the unit
4️⃣ Check if the error code disappears
If the error persists, follow the troubleshooting steps mentioned above.
Preventive Maintenance Tips to Avoid Errors
✅ Clean air filters every 2 weeks
✅ Refrigerant levels check annually
✅ Ensure proper ventilation around the outdoor unit
✅ Schedule professional servicing at least once a year
When to Contact Professional Support
🔹 Error code keeps returning despite troubleshooting
🔹 You hear unusual noises or the unit won’t turn on
🔹There’s a refrigerant leak (visible ice or hissing sound)
For major repairs, always consult a licensed HVAC technician or vist Our Air Conditioning Repair Page.
Gree air conditioners are efficient and durable, but error codes can appear due to maintenance issues, sensor faults, or power fluctuations. By understanding these error codes, you can diagnose problems quickly and keep your AC running smoothly.
💡 If you found this guide helpful, share it with others! Stay cool and enjoy hassle-free air conditioning. ❄️
Written by
Ali Elm
Ali is the Head of Operations at Be Cool Refrigeration with over a decade of hands-on experience in HVAC and commercial refrigeration. He oversees every installation, repair, and maintenance project, making sure the work meets the highest standards. Ali holds full F-Gas certification and has worked across residential, commercial, and industrial refrigeration systems throughout London and the South East. When he is not on site, he writes these guides to help business owners and homeowners understand their cooling systems better.