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Solid Red LED

Solid red LED — Module malfunction

Carrier · 38AP Air Handler

What does Solid Red LED mean?

The control module has detected an internal fault. This requires a module reset by removing power, and potentially replacing the module if the issue persists.

Common Causes

  • Internal fault within the control module

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Reset the module by removing power from T1-T2 for a short period.

  2. 2

    If the solid red light persists after power reset, replace 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