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3

Fault code 3 — Inverter AC current overload fault

Rheem · Air Handlers

What does 3 mean?

The AC current in the inverter system has exceeded the safe limit. This can indicate a system overload or a control board issue.

Common Causes

  • System overload
  • Control board fault

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check for any obstructions or blockages in the system that might cause overload.

  2. 2

    If no obstruction is found, the control board may need to be checked or replaced.

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 186)Search more codes in this manual