Kinghome Error Code A1: Outdoor fan IPM module protection (Heat Pump)

Updated October 13, 2026 · by Aurora Star Tech Inc.

Kinghome error code A1 on a heat pump means: Outdoor fan IPM module protection. It is also called Kinghome diagnostic code A1.

High severityHeat PumpKinghome Ultranixx Eco

Homeowner? What Kinghome code A1 means for you

Call a technician Your heat pump is reporting: Outdoor fan IPM module protection. 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) 657-2977 Book a service call

Licensed technicians serving Vaughan, Toronto and the GTA.

What does Kinghome error code A1 mean?

Outdoor fan inverter module fault.

Applies to: Kinghome Ultranixx Eco KD24UHO to KD60UHO outdoor units with KD..UHI air handlers

Common causes of Kinghome code A1

Fan wire phase missing
Overload
Failed IPM or 15 V supply

Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.

Kinghome models that use code A1

KD24UHI KD24UHO KD30UHI KD30UHO KD36UHI KD36UHO KD42UHI KD42UHO KD48UHI KD48UHO KD60UHI KD60UHO

Other Kinghome Heat Pump codes

Code	Meaning
AC	Outdoor fan startup failure
AE	Outdoor fan current detection error
AJ	Outdoor fan out-of-step
C4	ODU jumper cap error
C5	Jumper cap missing or wrong
C8	ODU drive jumper cap error
E1	High pressure protection / high-pressure sensor fault
E2	Indoor coil anti-freeze protection
E3	Low pressure protection / low-pressure sensor fault
E4	Compressor discharge temperature too high
E5	Overcurrent protection
E6	Indoor/outdoor communication fault

All Kinghome Heat Pump error codes →

Kinghome code A1: homeowner questions

What does Kinghome code A1 mean?

Outdoor fan IPM module protection. Outdoor fan inverter module fault.

Is it safe to keep using my heat pump with code A1?

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 A1 myself?

You can try one reset (power off for 30 seconds, then on). If Kinghome code A1 comes back, the cause is still there and a licensed technician should check it.

Who can fix Kinghome code A1 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 Ultranixx Eco KD24-60UHO service manual, sec. 3.3-3.4. 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.