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Red LED 4 flashes

Red LED flashes four times — Scroll high temperature

Carrier · 38AP Air Handler

What does Red LED 4 flashes mean?

The scroll NTC circuit has detected a temperature condition indicating potential overheating. This will temporarily stop the compressor. This code is not used for troubleshooting on 38AP units.

Common Causes

  • Scroll NTC circuit indicating high temperature

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    This code is not used for troubleshooting on 38AP units.

  2. 2

    Consult system specifications if this alert appears.

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