Gree Error Code E4: Compressor Discharge Temp Protection
Warning: Your Gree HVAC system has triggered a safety feature due to high compressor discharge temperature. It's safe to call a professional for repair.
How to Fix Gree Code E4
- Turn off your HVAC system at the thermostat and the main power switch.
- Check if the outdoor unit's condenser coils are clean. If not, gently clean them with a soft brush and water.
- Contact a professional HVAC technician for further diagnosis and repair.
How to Reset Gree Code E4
- Turn off the unit using the remote control or wall controller.
- Turn off the circuit breaker for the outdoor and indoor units. Wait 60 seconds.
- Restore power at the breaker.
- Turn the unit on with the remote control. If the error returns, the fault needs professional diagnosis.
Resetting clears the code from the display but does not fix the underlying fault. If the code returns after reset, proceed to the diagnostic steps above.
What Does Gree Error Code E4 Mean?
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.
Common Causes
- Low refrigerant levels
- Faulty compressor
- Clogged condenser coils
- Defective temperature sensor
Diagnostic Steps
| If... | Check | Expected |
|---|---|---|
| Outdoor unit is running | Compressor discharge temperature | Below 150°F (66°C) |
| Temperature is high | Refrigerant pressure | Normal pressure for your system |
Applicable Gree Models
- G-Series(electric)
- NC Series(electric)
- NCA(electric)
- NCB(electric)
- NCB Series(electric)
- NCG(gas)
- NCM(electric)
- NCQ(electric)
- NCV(electric)
- NG Series(gas)
- NPC(electric)
- NPE(electric)
- NPE Series(electric)
- NSC Series(electric)
- NSE(electric)
Replacement Parts
| Part | OEM Number | Est. Cost | Where to Buy |
|---|---|---|---|
| Compressor | 4850212000 | — | Find Part |
| Temperature sensor | 4850212001 | — | Find Part |
Related Codes on Same Models
Other codes that affect the same Gree model families as E4.
| Code | Description | Severity |
|---|---|---|
| C5 | Jumper/PCB Malfunction | Warning |
| E1 | High Pressure Protection | Warning |
| E3 | Low Pressure Protection | Warning |
| E5 | Over-Current Protection | Warning |
| E7 | Mode Conflict | Warning |
| F0 | Blower Temp Sensor Malfunction | Warning |
| F3 | Outdoor Ambient Sensor Failure | Warning |
| H1 | Defrost Mode (Normal) | Warning |
| H5 | IPM Protection | Warning |
| P0 | Inverter Module Protection | Warning |