Gree Mini Split Error Codes Explained (2026)
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Gree error codes — quick lookup
Common Gree (Sapphire / Vireo / Livo / Crown) codes. Gree also builds units sold under other brand names, so these E/F/H codes appear across them — confirm against your model's manual.
| Code | What it means | What to do |
|---|---|---|
E1 | System high-pressure protection (dirty coil, blocked airflow, failed fan) | Off; clean the outdoor coil & clear airflow, restart. Returns → pro (refrigerant circuit) |
E2 | Indoor anti-freeze protection — coil too cold | Off; clean filter, clear airflow, let ice melt, restart |
E3 | Compressor low-pressure protection (often a leak / low charge) | Technician — refrigerant work requires EPA 608 |
E4 | Compressor discharge temperature too high | Technician — do not run; refrigerant or compressor problem |
E5 | Low-voltage / over-current protection (unstable supply) | Confirm a correctly rated dedicated circuit & stable voltage; persists → pro |
E6 | Communication malfunction between indoor & outdoor units | Power off at breaker ~1 min, restart; returns → technician (wiring/boards) |
E8 | High-temperature (anti-high-temperature) protection | Off; clean filters, improve airflow, let it cool, restart; recurs → pro |
F0 | Refrigerant leak / lack-of-refrigerant protection | Technician — refrigerant work requires EPA 608 |
F1 | Indoor evaporator (coil) temperature sensor fault | Technician — board/sensor diagnosis |
F2 | Outdoor condenser coil temperature sensor fault | Technician |
F3 | Outdoor ambient temperature sensor fault | Technician |
F4 | Compressor discharge-tube temperature sensor fault | Technician |
H1 | Defrost mode — normal status during heating, not a failure | No action; wait a few minutes. Heating never resumes → pro |
H3 | Compressor overload protection tripped | Off; let it cool, ensure clean coil & airflow, restart; repeats → pro |
H5 | IPM (inverter power module) protection | Power off ~1 min and restart; returns → technician (inverter board) |
H6 | No feedback from the indoor fan motor (blocked or faulty) | Off; check the indoor fan is not obstructed, restart; persists → pro |
C5 | Jumper-cap / configuration fault or incompatible pairing | Technician — control-board/configuration issue |
EE | EEPROM (control-board memory) malfunction | Technician — control board needs service |
Gree error codes are alphanumeric fault codes a Gree ductless mini-split or heat pump shows to flag a specific problem. On most wall-mount and ducted Gree units the code appears directly on the indoor unit’s digital display (for example E6 for an indoor-to-outdoor communication fault or H1 for normal defrost mode); on units without a display, you read it from the blink pattern of the indoor or outdoor LED indicator, or from the wired/wireless controller. The codes are grouped by letter: E codes signal system-protection faults (pressure, communication, current), F codes point to temperature-sensor or refrigerant problems, and H codes cover heating, defrost, and power-module or fan-motor protection. Homeowners can safely handle airflow-related causes — cleaning filters, clearing the outdoor coil, and power-cycling at the breaker — but pressure, refrigerant, compressor, sensor, and control-board faults need a qualified HVAC technician. Always confirm the code against your specific model’s manual.
How to read a Gree error code
- Digital display: the code shows on the indoor head as a letter-and-number code
(e.g.
E6,H1). - LED blink pattern: units without a display report the fault via the indoor or outdoor LED indicator blink count.
- Remote: wired/wireless controllers can also display the code.
What the first letter tells you
| Letter | Area of the system |
|---|---|
| E | System protection (pressure, communication, current, mode) |
| F | Temperature sensors / refrigerant-related protection |
| H | Heating, defrost, power-module & fan-motor protection |
| C · EE | Configuration / jumper-cap and board-memory faults |
What to do first
- Turn the unit off; clean the indoor filter and clear the outdoor coil/airflow.
- Power-cycle at the breaker for about a minute, then restart.
- Remember H1 is normal defrost — no action needed.
If the same code returns, stop — pressure (E1/E3/E4), refrigerant (F0), compressor (H3), and power-module (H5) faults are not DIY fixes.
Sources
- GREE Comfort — “Understanding Gree Mini-Split Error Codes” and Ductless Multi-Port System Service & Troubleshooting Manual.
- Manufacturer-built OEM references (e.g. Lennox Gree-built service manuals; TOSOT, a Gree-owned brand) corroborating F0/H5/E8 and related codes.
Trademark note: “Gree” is a trademark of Gree Electric Appliances, Inc. of Zhuhai. This page is an independent homeowner resource and is not affiliated with, authorized by, or endorsed by Gree. Brand and code references are used factually for identification and troubleshooting only.
Frequently asked questions
How do I read the error code on a Gree mini split?
On units with a digital indoor display, the code shows directly on the indoor head as a letter-and-number code such as E6 or H1. If your model has no display, count the blink pattern of the indoor or outdoor LED indicator light, or check the code on the wired or wireless remote. Then match the code to your model's manual.
What does the E6 code mean on a Gree mini split?
E6 is a communication malfunction between the indoor and outdoor units. It is usually caused by a wiring problem on the interconnecting cable or a fault in one of the control boards. Try powering the system off at the breaker for a minute and restarting; if E6 returns, have a technician inspect the wiring and boards.
What is the H1 code on a Gree heat pump?
H1 means the unit has entered defrost mode during heating, which is a normal automatic function to melt frost off the outdoor coil, not a fault. The unit will pause heating for a few minutes and then resume on its own. Call a pro only if heating never returns afterward.
Can I reset a Gree error code myself?
For airflow-related codes you can often clear the fault by turning the unit off, cleaning the filters or clearing the outdoor coil, then power-cycling at the breaker for about a minute and restarting. If the same code comes right back, it points to a deeper fault that needs professional diagnosis.
When should I call a professional for a Gree error code?
Call a licensed HVAC technician for any pressure, refrigerant (E1, E3, E4, F0), sensor (F1–F4), compressor (H3), power-module (H5), or control-board (C5, EE) fault, or for any code that returns after a reset. Refrigerant handling legally requires EPA 608 certification, and compressor and high-voltage faults are not DIY repairs.