HVACopediaKinghome · Heat pump
E8 High temperature resistance (overload) protection
What the control is telling you
The coil temperature became too high, so the compressor stops in cooling and the whole unit stops in heating.
Applies to: Kinghome KM09HT1DI, KM12HT1DI, KM18HT1DI, KM24HT1DI wall mini-splits; Kinghome KM09HF1DI to KM24HF1DI wall mini-splits (Gree GFH..DA/DB)
Likely causes
- Hot outdoor ambient in cooling
- Poor outdoor airflow
- Refrigerant flow problem
Test and repair steps
- Clean the coils and clear the airflow.
- Check the fans.
- Verify charge and metering device.
- Retest once the load drops.
Models that show this code
9 models in Kinghome KM HT1DI, Kinghome KM HF1DI
Other codes on the same units
- E3 Low pressure protection / low-pressure sensor fault
- E4 Compressor discharge temperature too high
- E5 Overcurrent protection
- E6 Indoor/outdoor communication fault
- E9 Water overflow protection
- F0 Refrigerant recovery mode
- F1 Indoor room temperature sensor fault
- F2 Sensor fault (indoor coil or outdoor condenser)
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Source: Kinghome KM09-12-18-24HT1DI service manual, sec. 9.1 error code list; Kinghome KM09-24HF1DI service manual, sec. 11.1 error code list. Summarized in our own words; check the original manual for your model.
Homeowner looking at this code? See what it means for you and when to call a technician.
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.