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T051

T051 - Compressor 1 Failure (Locked Off)

Carrier · Air Conditioning

What does T051 mean?

This alert means Compressor 1 in Circuit A has failed after exceeding the automatic restart limit. The compressor is now locked off.

Common Causes

  • Exceeded 3 automatic restart attempts
  • Underlying failure causing repeated restarts

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Allow the system to rest for at least 30 minutes.

  2. 2

    Check for any error codes or indicators on the control panel.

  3. 3

    A qualified technician needs to diagnose the root cause of the repeated failures.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

A051A051 - Compressor 1 Stuck On FailureA052A052 - Compressor 2 Stuck On FailureA055A055 - Compressor 1 Stuck On Failure (Circuit B)
Source: Carrier Air Conditioning
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