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45

Compressor Winding Fault 45

Carrier · Heat Pumps

What does 45 mean?

A fault has been detected in the compressor windings, specifically indicating a grounded compressor. This suggests internal damage to the compressor. The system will reset after 15 minutes.

Common Causes

  • Grounded compressor

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    This fault typically indicates a serious internal compressor issue.

  2. 2

    Turn off power to the unit at the circuit breaker for safety.

  3. 3

    Consult a qualified HVAC technician for diagnosis and compressor 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