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9 Red Flashes

9 Red Flashes — Temporary Software Lockout

Carrier · Energy Recovery Ventilators

What does 9 Red Flashes mean?

Electrical interference is disrupting the IGC software, causing a temporary lockout. No gas heating will occur.

Common Causes

  • Electrical interference affecting the IGC software

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    The system will attempt an auto-reset after 1 hour.

  2. 2

    You can manually reset the unit by interrupting and restoring power.

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

Related Faults

1 Fault CodeFault Code 1 — OVERCURRENT10 Fault CodeFault Code 10 — PANEL LOSS11 Fault Code11 Fault Code — ID RUN FAIL
Source: Carrier Energy Recovery Ventilators
Open Manual (Page 56)Search more codes in this manual