Gree Mini Split Error Codes
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Featured codes
- E1 — E1 means the system has tripped high-pressure protection: refrigerant pressure rose a
- F2 — F2 means the controls are not getting a believable reading from the indoor evaporator
- F4 — F4 means the controls cannot trust the outdoor condenser (coil) temperature sensor re
- F5 — F5 means the compressor discharge temperature sensor circuit is open, shorted, or out
- H4 — H4 means the system has detected an abnormal operating condition and entered overload
- H7 — H7 means the inverter drive lost normal synchronization with the compressor (compress
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Safe checks with an external tool or supply
These pages list the check you can do from outside the unit, with an optional external tool or maintenance supply. None of them repair an internal fault.
- E1 — E1 means refrigerant pressure rose higher than the controls allow. The most homeowner-relevant cause is poor o…
- F2 — F2 means the controls are not getting a believable reading from a temperature sensor. On most current Gree wal…
- L1 — L1 means the indoor unit's humidity sensor is reading open, short, or out of range. The unit may stop or limit…
Related troubleshooting guides
Manufacturer manuals
- HeatPumpAnswers Gree error-code table (anti-freeze E2)
- GREE Comfort official guidance (E3 low pressure, filter/coil check then technician)
- HeatPumpAnswers Gree table (low-pressure protection, EPA 608 note)
- HeatPumpAnswers Gree error-code table
- GREE Comfort official error-code guidance (mode conflict section)
- AirConditioningManuals legacy Gree/Midea-built table (E9 wiring variant)
- GREE F2 error code - SplitAtlas (Livo R32 manual-aligned)
- GREE Troubleshoot Error Codes tool - GreeComfort (F2 indoor coil sensor)
E codes
- Gree E1 error code
E1 means refrigerant pressure rose higher than the controls allow. The most homeowner-relevant cause is poor outdoor airflow, but overcharge, restrict… - Gree E2 error code
On current Gree mini splits, E2 means indoor anti-freeze protection — the indoor coil temperature is reading too cold, usually because airflow over th… - Gree E3 error code
On current Gree mini splits, E3 means low-pressure protection — the refrigerant side is reading too low, which usually indicates a leak or undercharge… - Gree E4 error code
E4 returns after filters and outdoor clearance are corrected. Tell them the code is compressor high discharge temperature. Technician boundary Stop he… - Gree E5 error code
On current Gree residential mini splits (Livo, Vireo, FLEXX), E5 means over-current / low-voltage protection — the unit drew more current than allowed… - Gree E6 error code
Gree E6 is an indoor/outdoor communication fault. Safe steps: power off 2-3 minutes, check the units are on separate dedicated power, and reset once. … - Gree E7 error code
On Gree multi-zone mini splits, E7 usually means two or more indoor heads on the same outdoor unit are requesting incompatible modes — typically one r… - Gree E8 error code
On current Gree mini splits, E8 means anti-high-temperature protection — the unit is limiting or stopping operation because temperatures in the cycle … - Gree E9 error code
On current Gree R32 mini splits, E9 is usually a status display, not an error: the indoor fan is delayed or limited during heating startup so the unit…
F codes
- Gree F0 error code
Gree F0 is low-refrigerant/lack-of-refrigerant protection on R32 systems. Do not keep resetting - refrigerant leak detection and recharge require an E… - Gree F1 error code
F1 on a Gree mini split means the indoor coil (evaporator) temperature sensor is faulted. Filters and reset are safe to try; sensor replacement is a t… - Gree F2 error code
F2 means the controls are not getting a believable reading from a temperature sensor. On most current Gree wall-mount splits it is the indoor evaporat… - Gree F3 error code
Gree F3 is an outdoor ambient temperature sensor fault. One reset after a power-off is safe; sensor resistance testing and replacement are technician-… - Gree F4 error code
F4 means a temperature sensor on the outdoor side is reading open, short, or out of range - on current Gree splits it is the outdoor condenser coil se… - Gree F5 error code
F5 means the compressor discharge temperature sensor is reading open, short, or out of range, so the unit protects the compressor by stopping. Some Gr…
H codes
- Gree H1 error code
H1 is not an error - it means the heat pump is in defrost or oil-return mode during heating. The outdoor unit may steam and the indoor fan pauses; hea… - Gree H3 error code
Gree H3 is compressor overload protection. Safe steps: power off, let it cool 15-30 minutes, clean coils/filters and clear airflow, then restart once.… - Gree H4 error code
H4 is a broad system-abnormal or overload protection: the unit detected an operating condition outside its normal range, most often poor airflow or a … - Gree H5 error code
Gree H5 is IPM (inverter power module) protection. Safe steps: power off ~1 minute, clear outdoor airflow, restart once. The IPM and inverter board ar… - Gree H6 error code
Gree H6 is an indoor fan motor no-feedback fault. Safe steps: power off and check the indoor fan spins freely (visually), clean the filter, reset once… - Gree H7 error code
H7 means the inverter drive lost synchronization with the compressor - the compressor is not following the drive signal. The unit tries to start and t…
L codes
- Gree L1 error code
L1 means the indoor unit's humidity sensor is reading open, short, or out of range. The unit may stop or limit dehumidification. Sensor circuits are i… - Gree L3 error code
Gree L3 is an outdoor fan motor fault. Safe steps: power off, clear debris around the outdoor unit, reset once. Fan motor, capacitor, and wiring work … - Gree L9 error code
L9 means high-power (load) protection is active: the operating load is too high, so the unit limits or stops. Check supply stability and outdoor airfl…
P codes
- Gree P5 error code
Gree P5 is compressor phase-current (over-current) protection. One reset after a cool-down is safe; current measurement and inverter work is technicia… - Gree P6 error code
P6 means the outdoor unit's main control board and inverter drive board are not communicating. It is an internal outdoor-unit fault - one safe reset i… - Gree P7 error code
Gree P7 is an inverter module temperature sensor error. No DIY repair - the sensor sits on the inverter power module inside the outdoor unit (lethal D… - Gree P8 error code
P8 means the outdoor inverter module is running too hot (IPM/PFC high-temperature protection). Improving outdoor airflow is the safe homeowner step; t…
U codes
- Gree U1 error code
U1 means the outdoor unit's compressor phase-current detection circuit is malfunctioning, so the drive cannot trust current readings and protects the … - Gree U2 error code
U2 means the outdoor unit detected compressor phase-loss protection - the drive believes a compressor phase connection is missing or current is unbala… - Gree U3 error code
U3 means the DC bus-bar voltage dropped below the protection limit - usually a supply-power problem, weak reactor, or drive-board fault. Try one reset… - Gree U5 error code
U5 means the AC current detection circuit is abnormal - the unit cannot trust its current readings (the manual also ties it to low refrigerant in some… - Gree U7 error code
Gree U7 is a 4-way reversing valve abnormality on heat-pump models. DIY: confirm mode settings and reset once. Reversing valve coil and refrigerant wo… - Gree U8 error code
U8 means the outdoor unit is not receiving a valid zero-crossing signal from the indoor unit - usually indoor/outdoor wiring, a loose low-voltage conn… - Gree U9 error code
U9 means the outdoor unit's zero-crossing detection failed - most Gree tables read it as AC power zero-voltage detection error. Supply-quality events …