Kinghome Error Code U1: Compressor phase current detection circuit fault (Heat Pump)
Kinghome error code U1 on a heat pump means: Compressor phase current detection circuit fault. It is also called Kinghome diagnostic code U1.
Homeowner? What Kinghome code U1 means for you
Call a technician Your heat pump is reporting: Compressor phase current detection circuit fault. The heat pump has locked out or cannot run properly. One reset is fine; if the code comes back, it needs a licensed technician to find the cause.
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 Kinghome error code U1 mean?
The phase current sensing circuit is faulty.
Applies to: Kinghome KM09HT1DI, KM12HT1DI, KM18HT1DI, KM24HT1DI wall mini-splits; Kinghome KM09HF1DI to KM24HF1DI wall mini-splits (Gree GFH..DA/DB)
Common causes of Kinghome code U1
- Board circuit failure
Kinghome models that use code U1
KM09HF1DIKM09HT1DIKM12HF1DIKM12HT1DIKM18HF1DIKM18HT1DIKM21HF1DIKM24HF1DIKM24HT1DI
Other Kinghome Heat Pump codes
All Kinghome Heat Pump error codes →
Kinghome code U1: homeowner questions
What does Kinghome code U1 mean?
Compressor phase current detection circuit fault. The phase current sensing circuit is faulty.
Is it safe to keep using my heat pump with code U1?
It depends on the cause. The heat pump has locked out or cannot run properly. One reset is fine; if the code comes back, it needs a licensed technician to find the cause.
Can I reset Kinghome code U1 myself?
You can try one reset (power off for 30 seconds, then on). If Kinghome code U1 comes back, the cause is still there and a licensed technician should check it.
Who can fix Kinghome code U1 near me?
Aurora Star Tech Inc. repairs Kinghome 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
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. 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.