Gree Mini-Split Error Codes: Complete Diagnostic List
22 diagnostic codes documented · Official site ↗
🟡 Warning — Schedule Service
Jumper/PCB Malfunction
The C5 error code on your Gree HVAC system indicates a malfunction with the jumpers or printed circuit board (PCB). This could be due to a faulty component on the board, a broken jumper wire, or even a software issue. The system is still safe to operate, but it's important to have it checked out by a professional to prevent further damage or system failure.
High Pressure Protection
The E1 error code on your Gree HVAC system indicates that the high pressure switch has been activated. This could be due to a refrigerant leak, a clogged filter, or an issue with the compressor. It's important to note that this is a safety feature and the system has shut down to prevent further damage. Do not attempt to restart the system until the issue has been resolved.
Anti-Freeze Protection
The E2 error code on your Gree air conditioner indicates that the system has detected a fault in the anti-freeze protection circuit. This circuit is designed to prevent the outdoor unit from operating when the temperature drops below freezing to protect the compressor. When this error occurs, the system may not function properly in cold weather, but it should still work fine in normal temperatures.
Low Pressure Protection
The E3 error code on your Gree HVAC system indicates that the low pressure switch has been activated. This switch is designed to protect your system from operating at pressures that are too low, which can cause damage to the compressor and other components. The most common causes for low pressure are refrigerant leaks, clogged filters, or issues with the expansion valve.
Compressor Discharge Temp Protection
The E4 error code on your Gree HVAC system indicates that the compressor discharge temperature has exceeded the safe limit. This is a built-in safety feature to prevent damage to your unit. The system will shut down to protect itself and needs professional attention to resolve the issue.
Over-Current Protection
The E5 error code on your Gree HVAC system indicates that the over-current protection feature has been triggered. This feature is designed to safeguard your unit from excessive electrical current, which can cause damage to components. The most common causes for this error are a faulty compressor, a short circuit in the wiring, or an issue with the control board.
Communication Error Indoor/Outdoor
The E6 error code on your Gree HVAC system indicates a communication problem between the indoor and outdoor units. This could be due to a faulty wire, a damaged control board, or an issue with the communication module. The system will continue to run, but it may not operate at peak efficiency. It's important to have this issue addressed by a professional to prevent further damage or system failure.
Mode Conflict
The Gree E7 error code indicates that there's a conflict between the heating and cooling modes on your HVAC system. This could be due to a faulty mode selection switch or a problem with the system's wiring. The error will display on your system's digital display, and the system will not operate until the issue is resolved. While it's safe to operate the system in the meantime, it's important to address the problem to prevent further issues.
Anti-High Temperature Protection
The E8 error on your Gree air conditioner indicates that the anti-high temperature protection has been triggered. This feature is designed to safeguard your unit from overheating, which could potentially cause damage or even a fire. When this error occurs, the system shuts down to prevent any further issues. The most common causes for this error are problems with the temperature sensor or the fan motor.
Cold Air Prevention
The E9 error on your Gree air conditioner indicates that the system has detected a potential issue with cold air prevention. This feature is designed to prevent the unit from operating when the outdoor temperature is too low, which could damage the compressor. However, if you're seeing this error when it's not cold outside, it might mean that the system isn't correctly reading the outdoor temperature or there's an issue with the cold air prevention circuit.
Blower Temp Sensor Malfunction
The F0 error code on your Gree HVAC system indicates that the blower temperature sensor is not functioning correctly. This sensor is responsible for monitoring the temperature of the air leaving the blower. When it malfunctions, your system may not heat or cool properly, leading to reduced comfort and potentially higher energy bills. In some cases, the system might also enter a temporary lockout mode to prevent damage.
Indoor Ambient Sensor Failure
The F1 error code on your Gree HVAC system indicates a failure in the indoor ambient temperature sensor. This sensor is responsible for measuring the temperature in your living space and communicating it to the system's control board. When it fails, your HVAC system may not function properly or at all. It's important to note that this is not a safety hazard, but it does require professional repair to restore your system's full functionality.
Indoor Coil Sensor Failure
The F2 error code on your Gree HVAC system indicates a failure in the indoor coil sensor. This sensor is responsible for monitoring the temperature of the indoor coil, which helps regulate the airflow and cooling efficiency of your system. When this sensor fails, your HVAC system may not function as intended, leading to reduced comfort and potentially higher energy bills. It's important to address this issue promptly to maintain optimal performance and prevent further damage.
Outdoor Ambient Sensor Failure
The F3 error code on your Gree HVAC system indicates a failure in the outdoor ambient temperature sensor. This sensor is responsible for measuring the temperature outside your home to help your HVAC system maintain optimal indoor comfort. When this sensor fails, your system may not function as expected, leading to inefficiencies and potential comfort issues.
Outdoor Coil Sensor Failure
The F4 error code on your Gree HVAC system indicates a failure in the outdoor coil temperature sensor. This sensor is crucial for monitoring and controlling the refrigeration cycle. When it malfunctions, your system may not operate correctly, leading to reduced cooling efficiency or even system lockouts. Common causes for this issue in Gree systems include sensor damage due to dirt or debris, sensor wiring problems, or a faulty sensor itself. It's essential to address this problem promptly to prevent further damage or system failure.
Compressor Discharge Sensor Failure
The F5 error on your Gree air conditioner indicates a failure in the compressor discharge sensor. This sensor measures the temperature of the refrigerant leaving the compressor. If it malfunctions, your AC may not cool properly or may cycle on and off frequently. In some cases, it might cause the system to lock up entirely. This issue is not an immediate safety hazard, but it's important to address it promptly to prevent further damage to your AC system.
Defrost Mode (Normal)
The H1 error code on your Gree air conditioner indicates that the unit has entered defrost mode. This is a normal part of the heating cycle in heat pump systems, especially during cold weather. However, if you're seeing this code frequently or during warm weather, it could be a sign of a problem with your system's defrost mechanism or reversing valve.
Compressor Overload Protection
The H3 error code on your Gree air conditioner indicates that the compressor has overheated and tripped its overload protection. This is a safety feature designed to prevent damage to the compressor. The compressor is the heart of your air conditioner, and if it fails, it can be expensive to replace. It's important to address this issue promptly to avoid further damage or a complete system failure.
IPM Protection
The IPM is a safety feature in your Gree HVAC system that monitors the indoor unit's operation. If it detects any abnormal conditions, it triggers the H5 error code and shuts down the system. This could be due to a temporary glitch or a more serious issue. It's important to address this problem promptly to prevent further damage or system failure.
Indoor Fan Motor Malfunction
The H6 error code on your Gree air conditioner indicates a problem with the indoor fan motor. This motor is responsible for circulating air throughout your home. When it malfunctions, your AC system will display this error and stop working to prevent further damage. This issue is common in Gree units due to dust accumulation, age, or electrical issues.
Inverter Module Protection
The P0 error code on your Gree HVAC system indicates that the inverter module has triggered its protection mechanism. This could be due to an overcurrent, overvoltage, or overtemperature condition. The system has shut down to prevent damage, but it needs professional diagnosis and repair to resume normal operation.
Reversing Valve Malfunction
The U7 error code on your Gree air conditioner indicates a malfunction with the reversing valve. This valve is responsible for switching the refrigerant flow between heating and cooling modes. When it's not working correctly, your system may not switch modes properly, leading to comfort issues and potentially damaging the compressor. It's important to address this issue promptly to prevent further problems.