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12

Fault code 12 — PFC overload current detection of failure

Rheem · Air Handlers

What does 12 mean?

The Power Factor Correction (PFC) circuit is detecting an overload current. This suggests a system overload, a faulty control board, or a problem with the PFC itself.

Common Causes

  • System overloads, and the current is too high
  • Control board fails
  • PFC fails

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the system for any signs of overload.

  2. 2

    If no overload is found, the control board may be faulty.

  3. 3

    The PFC component itself might 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