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PC0F

PC0F — PFC module protection

Lennox · Air Conditioning

What does PC0F mean?

Protection has been activated for the Power Factor Correction (PFC) module. This module helps regulate power input to the unit.

Common Causes

  • PFC module failure
  • Overvoltage or undervoltage conditions
  • Internal electrical fault

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the incoming voltage to ensure it is within the unit's operating range.

  2. 2

    Reset the unit by turning off the power breaker for 30 seconds, then restoring it.

  3. 3

    If the error persists, the PFC module or related components may require professional servicing.

Browse all codes in this manual (57)
Verified technical data. Last updated: April 2026

Related Faults

E0E0 — Indoor unit EEPROM error (MMDB Indoor Units)E1E1 — Communication error between indoor and outdoor units (MMDB Indoor Units)E3E3 — Indoor fan speed error (MMDB Indoor Units)
Source: Lennox Air Conditioning
Open Manual (Page 7)Search more codes in this manual