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25

Invalid Model Event 25

Carrier · Heat Pumps

What does 25 mean?

The system has detected an invalid model plug. This can mean the wrong plug is installed, the plug itself is damaged, or the outdoor unit (ODU) control board is faulty.

Common Causes

  • Wrong Model Plug Installed
  • Damaged Model Plug
  • Damaged ODU control

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify that the correct model plug for your unit is properly installed.

  2. 2

    Check the model plug for any signs of corrosion or breakage; replace it if it appears damaged.

  3. 3

    If the model plug is confirmed correct and undamaged, the ODU control may be damaged and require replacement.

Browse all codes in this manual (40)
Verified technical data. Last updated: April 2026

Related Faults

1 (1 sec ON), longer pause (2 sec OFF)Amber LED flashes 1 time (1 sec ON) then longer pause (2 sec OFF) — Variable Capacity Range Cutback1, pauseAmber LED flashes 1 time then pauses — Variable Capacity Operation16Communication Loss Event 16
Source: Carrier Heat Pumps
Open Manual (Page 20)Search more codes in this manual