Kinghome Error Code dd: Pilot (test) run in progress (Heat Pump)
Kinghome error code dd on a heat pump means: Pilot (test) run in progress. It is also called Kinghome diagnostic code dd.
Homeowner? What Kinghome code dd means for you
Usually minor Your heat pump is reporting: Pilot (test) run in progress. This code is usually informational or minor. The safe checks below often clear it; call us if it keeps showing up.
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 dd mean?
dd is shown on the indoor display while the pilot run is active. The unit runs in cooling and the indoor unit sends a pilot-run request to the outdoor unit. Leaving the mode clears dd. If the outdoor unit reports wrong interconnect wiring or an expansion valve problem, dn is shown instead.
Applies to: Kinghome KM09HEDI, KM12HEDI, KM18HEDI wall mini-splits
Kinghome models that use code dd
Other Kinghome Heat Pump codes
All Kinghome Heat Pump error codes →
Kinghome code dd: homeowner questions
What does Kinghome code dd mean?
Pilot (test) run in progress. dd is shown on the indoor display while the pilot run is active. The unit runs in cooling and the indoor unit sends a pilot-run request to the outdoor unit. Leaving the mode clears dd. If the outdoor unit reports wrong interconnect wiring…
Is it safe to keep using my heat pump with code dd?
Usually yes. Code dd is normally minor, but if it keeps coming back have it checked.
Can I reset Kinghome code dd myself?
You can try one reset (power off for 30 seconds, then on). If Kinghome code dd comes back, the cause is still there and a licensed technician should check it.
Who can fix Kinghome code dd 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
Troubleshooting guides
- Force a defrost cycle from the remote Kinghome · Heat Pump
- Force a defrost from the outdoor board (debug item 06) Kinghome · Heat Pump
- Force cooling or heating from the outdoor board (debug item 09) Kinghome · Heat Pump
- Open the outdoor board debug menu (SW1 held 5 s) Kinghome · Heat Pump
- Start refrigerant recovery from the outdoor board (debug item 08) Kinghome · Heat Pump
- Start the pilot (test) run from the remote Kinghome · Heat Pump
- Switch between defrosting mode 1 and 2 Kinghome · Heat Pump
Source: Kinghome KM09-12-18HEDI service manual, sec. 7.10 pilot run function. 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.