Kinghome Error Code Timer lamp: Timer lamp lit (timer set) (Heat Pump)

Updated October 16, 2026 · by Aurora Star Tech Inc.

Kinghome error code Timer lamp on a heat pump means: Timer lamp lit (timer set). It is also called Kinghome diagnostic code Timer lamp.

Low severityHeat PumpKinghome KM HT1DI

Homeowner? What Kinghome code Timer lamp means for you

Usually minor Your heat pump is reporting: Timer lamp lit (timer set). 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) 657-2977 Book a service call

Licensed technicians serving Vaughan, Toronto and the GTA.

What does Kinghome error code Timer lamp mean?

The Timer lamp on the indoor unit is on when a Timer ON is set while the unit is off, or a Timer OFF is set while the unit is running. It goes out when the timer is cancelled or has run.

Applies to: Kinghome KM09HT1DI, KM12HT1DI, KM18HT1DI, KM24HT1DI wall mini-splits

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 Timer lamp

KM09HT1DI KM12HT1DI KM18HT1DI KM24HT1DI

Other Kinghome Heat Pump codes

Code	Meaning
PL	DC bus voltage low
PU	Capacitor charging failure
SE	Energy-saving mode active
Shielded icon	Functions shielded by remote monitor
SW1	Outdoor board debug menu (SW1 held 5 s)
Temp display select	Indoor display shows set, room or outdoor temperature
Turbo icon	Turbo mode active
U1	Compressor phase current detection circuit fault
U3	DC bus voltage drop fault
U5	Whole-unit current detection fault
U7	Four-way valve abnormal
UL	Outdoor fan overcurrent

All Kinghome Heat Pump error codes →

Kinghome code Timer lamp: homeowner questions

What does Kinghome code Timer lamp mean?

Timer lamp lit (timer set). The Timer lamp on the indoor unit is on when a Timer ON is set while the unit is off, or a Timer OFF is set while the unit is running. It goes out when the timer is cancelled or has run.

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

Usually yes. Code Timer lamp is normally minor, but if it keeps coming back have it checked.

Can I reset Kinghome code Timer lamp myself?

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

Who can fix Kinghome code Timer lamp 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

2 flashes: HPS open ≥6 s; 3: discharge >263°F; 4: discharge <90°F after 1 h; 5: defrost failure; 6: discharge sensor short; 7: outdoor sensor open/short; 9: bonnet sensor fail All brands · Heat Pump
Excess ice on outdoor coil All brands · Heat Pump
Extremely high head pressure in heating (dual fuel) All brands · Heat Pump
Insufficient heat in cold weather All brands · Heat Pump
Liquid slugging / compressor damage in heating All brands · Heat Pump
No mode change / wrong mode All brands · Heat Pump
Odour at registers (dirty sock) All brands · Heat Pump
Poor heating but OK cooling (or vice-versa) All brands · Heat Pump
Service problem analysis (Amana chart excerpt) All brands · Heat Pump
Subcooling too high All brands · Heat Pump
Subcooling too low vs mfr target All brands · Heat Pump
TXV bulb/diaphragm failure All brands · Heat Pump
Water-source: coil freezing All brands · Heat Pump
Won't change mode / both coils same temperature All brands · Heat Pump
Wrong superheat after line-set change; poor capacity All brands · Heat Pump
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 KM09-12-18-24HT1DI service manual, sec. 6.2 floor-ceiling panel lamps. 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.