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46

Fault code 46 — IPM and control board communication fault

Rheem · Air Handlers

What does 46 mean?

There is a communication error between the Intelligent Power Module (IPM) and the control board. Refer to tables 503 and 504 for detailed analysis.

Common Causes

  • Communication error between IPM and control board

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the driver board fault LEDs for specific error codes (refer to Table 504).

  2. 2

    Inspect wiring connections between the IPM and the control board.

  3. 3

    This fault often requires professional diagnosis.

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 184)Search more codes in this manual