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T057

T057 — Circuit B, Compressor 3 Chattering Failure Alert

Carrier · 38AP Air Handler

What does T057 mean?

This alert signifies that Compressor 3 on Circuit B is rapidly cycling on and off (chattering). The affected compressor has been shut down to prevent damage. Requires a manual reset.

Common Causes

  • Compressor 3 is chattering
  • System pressure or charge issues
  • Faulty control signal

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Manually reset the alert.

  2. 2

    Investigate the cause of Compressor 3 chattering.

  3. 3

    Check system operating parameters.

  4. 4

    Consult a professional technician.

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

Related Faults

A051A051 — Circuit A, Compressor 1 Stuck On Failure AlarmA052A052 — Circuit A, Compressor 2 Stuck On Failure AlarmA053A053 — Circuit A, Compressor 3 Stuck On Failure Alarm
Source: Carrier 38AP Air Handler
Open Manual (Page 163)Search more codes in this manual