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50

50 — DC voltage detected abnormal

Rheem · Air Handlers

What does 50 mean?

This code signals an abnormal DC voltage detection, often related to the fan motor system. It could be that the fan motor system is overloaded, the control board is faulty, or the fan motor has insulation issues.

Common Causes

  • Fan motor system overload
  • Control board failure
  • Fan motor insulation failure

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Replace the fan motor.

  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