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8

Fault code 8 — Inverter IPM fault (level)

Rheem · Air Handlers

What does 8 mean?

This fault indicates a problem with the Intelligent Power Module (IPM) on the inverter system.

Common Causes

  • System overload or current overload
  • Control board fault
  • Compressor oil shortage, serious wear of crankshaft
  • Compressor insulation fault

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect the system for potential overloads.

  2. 2

    If the system appears normal, the control board might be faulty.

  3. 3

    Compressor-related issues like oil shortage or wear could also be the cause.

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