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A156

A156 — Critical Serial EEPROM Storage Fail Error

Carrier · Energy Recovery Ventilators

What does A156 mean?

A critical failure in the serial EEPROM storage has occurred, causing a unit shutdown.

Common Causes

  • Software failure

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Perform a full system reboot.

  2. 2

    Verify that the unit's software is up to date.

  3. 3

    If the shutdown persists, contact technical support.

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 47)Search more codes in this manual