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T111

T111 - Circuit B Loss of Charge

Carrier · Air Conditioning

What does T111 mean?

The system has detected a loss of refrigerant charge in Circuit B. The circuit will stop to prevent damage to the compressor.

Common Causes

  • Low refrigerant charge (leak)
  • Faulty seal or connection

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check for any visible signs of refrigerant leaks around the unit.

  2. 2

    Ensure no recent maintenance work was performed that could have caused a leak.

  3. 3

    A certified HVAC technician must recharge the system and repair any leaks.

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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