Gree Error Code H4: System abnormal (overload) (Heat Pump)
Gree error code H4 on a heat pump means: System abnormal (overload). It is also called Gree diagnostic code H4.
Homeowner? What Gree code H4 means for you
Check, then call Your heat pump is reporting: System abnormal (overload). This is often caused by something simple. Try the safe checks below; if the code returns, book a service call before it turns into a no-heat or no-hot-water emergency.
Safe things you can check yourself
- Check the thermostat: right mode (Heat or Cool), set a few degrees past room temperature, and fresh batteries if it uses them.
- Check both breakers and the outdoor disconnect box beside the outdoor unit; all should be ON.
- Look at the air filter. If it is grey and clogged, replace it; a blocked filter causes many shutdowns.
- In winter, keep snow and ice off and away from the outdoor unit. A short defrost cycle with steam is normal.
- Try one reset: turn the power off for 30 seconds, then back on. If the code comes back, stop resetting and call a technician.
Call (647) 657-2977Book a service call
Licensed technicians serving Vaughan, Toronto and the GTA.
What does Gree error code H4 mean?
The system tripped on overload / high coil temperature.
Applies to: Gree Sapphire 9-24k (SAP..HP230V1A)
Common causes of Gree code H4
- High ambient
- Poor airflow
- Refrigerant flow problem
Gree models that use code H4
SAP09HP230V1AHSAP12HP230V1AHSAP18HP230V1AHSAP24HP230V1AH
Other Gree Heat Pump codes
All Gree Heat Pump error codes →
Gree code H4: homeowner questions
What does Gree code H4 mean?
System abnormal (overload). The system tripped on overload / high coil temperature.
Is it safe to keep using my heat pump with code H4?
It depends on the cause. This is often caused by something simple. Try the safe checks below; if the code returns, book a service call before it turns into a no-heat or no-hot-water emergency.
Can I reset Gree code H4 myself?
You can try one reset (power off for 30 seconds, then on). If Gree code H4 comes back, the cause is still there and a licensed technician should check it.
Who can fix Gree code H4 near me?
Aurora Star Tech Inc. repairs Gree heat pumps in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.
Homeowner help: AC Running But Not Cooling: What to Check · Heat Pump Not Heating or Blowing Cold Air
Troubleshooting guides
- Compressor will not run - Gree ductless Gree · Heat Pump
- Louver will not swing - Gree ductless Gree · Heat Pump
- Noise or vibration - Gree ductless Gree · Heat Pump
- Outdoor fan will not run - Gree ductless Gree · Heat Pump
- Unit will not start - Gree ductless Gree · Heat Pump
- Water leaking from indoor unit - Gree ductless Gree · Heat Pump
- Weak cooling or heating - Gree ductless Gree · Heat Pump
Source: Gree Sapphire 9-12k (SAP09-12HP230V1A) service.pdf - section 9.1 Error Code List / 9.2 Procedure of Troubleshooting; Gree Sapphire 18-24k (SAP18-24HP230V1A) service.pdf - section 9.1 Error Code List / 9.2 Procedure of Troubleshooting. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.