Gree Error Code H3: Compressor Overload Protection
Warning: Your Gree air conditioner has encountered a compressor overload and has shut down to prevent damage.
How to Fix Gree Code H3
- Step 1: Turn off your air conditioner at the thermostat and at the circuit breaker.
- Step 2: Check and replace your air filter if it's dirty. A clean filter can prevent the compressor from overheating.
- Step 3: If the issue persists, call a professional HVAC technician to diagnose and repair the problem.
How to Reset Gree Code H3
- 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 H3 Mean?
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.
Common Causes
- High outdoor ambient temperature
- Dirty air filter
- Low refrigerant level
- Faulty compressor or compressor relay
Diagnostic Steps
| If... | Check | Expected |
|---|---|---|
| Air conditioner is not cooling | Check the outdoor temperature | Below 95°F (35°C) |
| Air filter is dirty | Replace the air filter with a new one | Clean filter |
| Compressor is running but not cycling on/off | Check the compressor relay for continuity | No continuity (open) |
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 | Gree 3880015000 | — | Find Part |
| Compressor Relay | Gree 3880015001 | — | Find Part |
Related Codes on Same Models
Other codes that affect the same Gree model families as H3.
| 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 |