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11

Fault code 11 — PFC power detection of failure

Rheem · Air Handlers

What does 11 mean?

The Power Factor Correction (PFC) circuit is failing to detect power correctly. This can be due to unstable power, power interruptions, or a faulty control board.

Common Causes

  • The power supply is not stable
  • Instantaneous power failure
  • Control board failure

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the power supply for stability and correct voltage.

  2. 2

    Note any recent power failures.

  3. 3

    If power is stable, the main PCB (control board) may need to be changed.

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