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33

33 — EE data abnormal

Rheem · Air Handlers

What does 33 mean?

This error means the EEPROM data on the control board is abnormal. This could be an issue with the EEPROM itself or the control circuit connected to it.

Common Causes

  • EEPROM failure
  • EEPROM control circuit failure
  • Incorrect EEPROM installation

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Replace the EEPROM.

  2. 2

    Replace the Main PCB.

Browse all codes in this manual (51)
Verified technical data. Last updated: April 2026

Related Faults

1Fault code 1 — Inverter DC voltage overload fault10Fault code 10 — PFC fault (level)11Fault code 11 — PFC power detection of failure
Source: Rheem Air Handlers
Open Manual (Page 187)Search more codes in this manual