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Red LED 6 flashes

Red LED flashes six times — Missing phase

Carrier · 38AP Air Handler

What does Red LED 6 flashes mean?

A phase is missing in one of the three leads supplying power to the compressor. This will stop the compressor. The system will attempt to reset after 5 minutes if the phase condition is corrected. Lockout occurs after 10 consecutive alerts.

Common Causes

  • One phase of the incoming power is missing
  • Faulty wiring to the compressor
  • Issues with fuses or circuit breakers

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check incoming power supply for all three phases.

  2. 2

    Inspect fuses or circuit breakers supplying power.

  3. 3

    Verify the compressor contactor is functioning correctly.

  4. 4

    Allow 5 minutes for automatic reset if the condition is resolved.

  5. 5

    If locked out, cycle power to the module.

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 143)Search more codes in this manual