In this part 1, we'll update the error codes with symbols E, F, and C on Gree wall-mounted air conditioners. Let's follow along!
Gree wall-mounted air conditioner error codes – symbol E
Gree wall-mounted air conditioner error codes – symbol E include the following:
1. Error code E1
+ Error name: High pressure protection 1.
+ Cause: Excess gas; poor heat exchange (dirty or blocked heat exchange coil, excessively high ambient temperature).
2. Error code E2
+ Error name: Anti-freezing protection.
+ Cause: Poor indoor heat exchange; abnormal fan speed; dirty evaporator coil.
3. Error code E3
+ Error name: Low pressure protection.
+ Cause: Low pressure protection; system low pressure protection; compressor low pressure protection.

4. Error code E4
+ Error name: Compressor discharge line temperature protection.
+ Cause: Check connections, use a multimeter to measure the resistance value of the sensor.
5. Error code E5
+ Error name: Overcurrent protection.
+ Cause: Unstable voltage; voltage too low or too high; dirty heat exchange coil.
6. Error code E6
+ Error name: Signal error.
+ Cause: Check signal wires connecting between outdoor unit and indoor unit.
7. Error code E8
+ Error name: Excessive operating temperature protection.
+ Cause: Outdoor and indoor units excessively dirty or airflow blocked; fan motor not functioning, abnormal fan speed, fan speed too low or fan not running; compressor operates abnormally, strange noise or oil leakage occurs. Compressor shell temperature too high; system obstructed internally (dirt, oil sludge, valve not fully open); mainboard temperature sensor not accurately sensing.

8. Error code EE
+ Error name: Outdoor unit mainboard error.
+ Cause: Replace outdoor unit mainboard.
9. Error code EU
+ Error name: Outdoor unit mainboard heat sink too hot.
+ Cause: High ambient temperature or improper heat sink connection.
Gree wall-mounted air conditioner error codes – symbol F
Gree wall-mounted air conditioner error codes – symbol F include the following:
1. Error code F0
+ Error name: System low gas protection.
+ Cause: Refrigerant leakage; abnormal operation of indoor coil temperature sensor; improper sensor placement; compressor unable to start normally; due to low power supply voltage and operation in excessively high temperature conditions.
2. Error code F1
+ Error name: Indoor coil temperature sensor.
+ Cause: Connection wire between environmental temperature sensor and mainboard broken or poor contact; short circuit on Mainboard; environmental sensor damaged; mainboard damaged.
3. Error code F2
+ Error name: Evaporator coil temperature sensor on indoor unit.
+ Cause: Connection wire between coil temperature sensor and mainboard broken or poor contact; circuit interruption on Mainboard due to foreign object falling into it; copper pipe sensor damaged; mainboard damaged.
4. Error code F3
+ Error name: Outdoor coil temperature sensor.
+ Cause: Poor or damaged sensor connection; check sensor according to the resistance value table of the temperature sensor below.
5. Error code F4
+ Error name: Outdoor stop coil temperature sensor on outdoor unit.
+ Cause: Poor or damaged sensor connection. Check the sensor according to the resistance value table of the temperature sensor below.
6. Error code F5
+ Error name: Compressor discharge line sensor 1.
+ Cause: Poor or damaged sensor connection. Check the sensor according to the resistance value table of the temperature sensor below; sensor not placed inside copper pipe.
7. Error code F6
+ Error name: Heat sink sensor error.
+ Cause: Replace outdoor unit board.
8. Error code F8
+ Error name: Overcurrent protection.
+ Cause: Supply voltage too low. System pressure too high and overloaded;
8. Error code FH
+ Error name: Frequency limit/reduction due to anti-freezing protection.
+ Cause: Fan speed too low or insufficient air return to the unit.

Gree wall-mounted air conditioner error codes – symbol C
Gree wall-mounted air conditioner error codes – symbol C has only one code: C5:
+ Error name: Jumper protection error on board
+ Cause: No jumper protection on board; jumper on board not properly or securely attached; jumper on board damaged; mainboard damaged.
Above is the latest update on Gree wall-mounted air conditioner error codes for 2023 with symbols E, F, and C. Some notable Gree wall-mounted air conditioner models you can consider when purchasing include: Gree Inverter 9000BTU GWC09PB-K3D0P4; Gree 9000BTU GWC09KB-K6N0C4; Gree Inverter 12000BTU GWC12PB-K3D0P4; Gree 12000BTU GWC12KC-K6N0C4; Gree Inverter GWC09CA-K3DNC2I – 9000BTU; Gree GWC12IC-K3N9B2J – 12,000BTU; Gree GWC09IB-K3N9B2I – 9000BTU; Gree Inverter 9000BTU GWC09FB-K6D9A1W…