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Kinghome · Heat pump

F5 Outdoor discharge temperature sensor fault

Medium severity Kinghome KM HT1DIKinghome KM HF1DI

What the control is telling you

The discharge sensor is open/shorted; the compressor stops after about 3 minutes of running.

Applies to: Kinghome KM09HT1DI, KM12HT1DI, KM18HT1DI, KM24HT1DI wall mini-splits; Kinghome KM09HF1DI to KM24HF1DI wall mini-splits (Gree GFH..DA/DB)

Likely causes

  • Loose sensor plug or poor terminal contact
  • Failed (open or shorted) sensor
  • Fault in the board's sensing circuit
  • Sensor not inserted fully in its pipe pocket

Test and repair steps

  1. Check that the discharge sensor plug is seated fully on the board header.
  2. Unplug the sensor and measure its resistance; compare it with the temperature/resistance chart in the manual appendix.
  3. Replace the sensor if the reading is open, shorted or far from the chart.
  4. If the sensor is good and the plug is secure, replace the control board.
  5. Confirm the sensor tip is seated in its tube.

Models that show this code

9 models in Kinghome KM HT1DI, Kinghome KM HF1DI

KM09HF1DIKM09HT1DIKM12HF1DIKM12HT1DIKM18HF1DIKM18HT1DIKM21HF1DIKM24HF1DIKM24HT1DI

Other codes on the same units

  • F1 Indoor room temperature sensor fault
  • F2 Sensor fault (indoor coil or outdoor condenser)
  • F3 Outdoor ambient temperature sensor fault
  • F4 Sensor fault (outdoor condenser or discharge)
  • F6 Frequency limit for overload / ODU tube sensor fault
  • F8 Frequency reduced - overcurrent
  • F9 Frequency reduced - high discharge temperature
  • H3 Compressor overload protection

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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.