KeepRite Error Code Amber 4 flashes: Outdoor fan delay after defrost is defeated (Heat Pump)

Updated October 15, 2026 · by Aurora Star Tech Inc.

KeepRite error code Amber 4 flashes on a heat pump means: Outdoor fan delay after defrost is defeated. It is also called KeepRite diagnostic code Amber 4 flashes.

Low severityHeat PumpKeepRite *CA/*CH Two-Stage Communicating

Homeowner? What KeepRite code Amber 4 flashes means for you

Usually minor Your heat pump is reporting: Outdoor fan delay after defrost is defeated. 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 KeepRite error code Amber 4 flashes mean?

Four flashes shown while the fan-delay toggle is being checked: the outdoor fan starts right at the end of defrost with no delay. It records a setting, not a fault.

Applies to: *CA/*CH two-stage communicating heat pump boards

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.

KeepRite models that use code Amber 4 flashes

*CH624 *CH636 *CH648 *CH660 *CH924 *CH936 *CH948 *CH960

Other KeepRite Heat Pump codes

Code	Meaning
82	Thermal lockout (two-stage: high stage)
83	Low pressure lockout
84	High pressure lockout
Amber 1 flash	Running - cooling / low stage (normal)
Amber 2 flashes	High stage running (normal)
Amber 3 flashes	Outdoor fan delay after defrost is on (20 s)
Amber 5 flashes	Brown-out protection turned off (user setting)
Amber 6 flashes	Brown-out protection active (user setting)
Amber LED off	Standby - no call (2-wire hookup or indoor unit unpowered)
Amber LED on solid	Standby - no call (communicating)
Brown-out defeat toggle	Turn 230 V brown-out protection off or on
Defrost speed-up pins	Speed up the defrost timer for testing

All KeepRite Heat Pump error codes →

KeepRite code Amber 4 flashes: homeowner questions

What does KeepRite code Amber 4 flashes mean?

Outdoor fan delay after defrost is defeated. Four flashes shown while the fan-delay toggle is being checked: the outdoor fan starts right at the end of defrost with no delay. It records a setting, not a fault.

Is it safe to keep using my heat pump with code Amber 4 flashes?

Usually yes. Code Amber 4 flashes is normally minor, but if it keeps coming back have it checked.

Can I reset KeepRite code Amber 4 flashes myself?

You can try one reset (power off for 30 seconds, then on). If KeepRite code Amber 4 flashes comes back, the cause is still there and a licensed technician should check it.

Who can fix KeepRite code Amber 4 flashes near me?

Aurora Star Tech Inc. repairs KeepRite 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 or skip the 5-minute delay KeepRite · Heat Pump
Forcing a defrost to test the board - KeepRite N4H4/R4H4/WCH4/NXH5 KeepRite · Heat Pump
Outdoor unit will not run or will not defrost - KeepRite heat pump defrost board (FAST 1173636/1177927/1190281) KeepRite · Heat Pump
Speed up the defrost timer for testing (J1 speed-up pins) KeepRite · Heat Pump
Switch the post-defrost outdoor fan delay off or on KeepRite · Heat Pump
Turn 230 V brown-out protection off or on KeepRite · Heat Pump

Source: KeepRite ICP split A-C + HP (R-410A & R-22) Application Guideline and Service Manual 421 08 5400 04, Defrost / fan delay defeat, p.56-57. 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.