ICP Error Code Defrost SPEEDUP test: Defrost board SPEEDUP pin test (Heat Pump)
ICP error code Defrost SPEEDUP test on a heat pump means: Defrost board SPEEDUP pin test. It is also called ICP diagnostic code Defrost SPEEDUP test.
Homeowner? What ICP code Defrost SPEEDUP test means for you
Usually minor Your heat pump is reporting: Defrost board SPEEDUP pin test. 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 ICP error code Defrost SPEEDUP test mean?
With the unit heating and the defrost thermostat closed, shorting the SPEEDUP pins on the defrost board skips the remaining interval timer and forces a defrost. In normal operation the reversing valve shifts within 1 to 21 seconds. During defrost the outdoor fan stops and strip heat comes on. In the shortened test the defrost ends when the defrost thermostat opens at 65 F or the short timer ends (under 10 minutes).
Applies to: ICP N4H3 heat pumps
ICP models that use code Defrost SPEEDUP test
Other ICP Heat Pump codes
All ICP Heat Pump error codes →
ICP code Defrost SPEEDUP test: homeowner questions
What does ICP code Defrost SPEEDUP test mean?
Defrost board SPEEDUP pin test. With the unit heating and the defrost thermostat closed, shorting the SPEEDUP pins on the defrost board skips the remaining interval timer and forces a defrost. In normal operation the reversing valve shifts within 1 to 21 seconds. During…
Is it safe to keep using my heat pump with code Defrost SPEEDUP test?
Usually yes. Code Defrost SPEEDUP test is normally minor, but if it keeps coming back have it checked.
Can I reset ICP code Defrost SPEEDUP test myself?
You can try one reset (power off for 30 seconds, then on). If ICP code Defrost SPEEDUP test comes back, the cause is still there and a licensed technician should check it.
Who can fix ICP code Defrost SPEEDUP test near me?
Aurora Star Tech Inc. repairs ICP 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
- Comfort Alert module basics ICP · Heat Pump
- Defrost not working - test the defrost board ICP · Heat Pump
- Force a defrost with the SPEEDUP pins ICP · Heat Pump
Source: ICP N4H3 Installation Instructions, Defrost System (defrost control board and testing). 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.