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1

Fault code 1 — Inverter DC voltage overload fault

Rheem · Air Handlers

What does 1 mean?

The DC voltage in the inverter system is too high. This can be caused by issues with the power supply or the control board.

Common Causes

  • Power supply input is too high or too low
  • Control board fault

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the power supply voltage.

  2. 2

    If the voltage is correct, consider replacing the control board.

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

Related Faults

10Fault code 10 — PFC fault (level)11Fault code 11 — PFC power detection of failure12Fault code 12 — PFC overload current detection of failure
Source: Rheem Air Handlers
Open Manual (Page 186)Search more codes in this manual