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PC0A

PC0A — High temperature protection of condenser

Lennox · Air Conditioning

What does PC0A mean?

The condenser coil in the outdoor unit has reached an excessively high temperature, triggering a protective shutdown.

Common Causes

  • Blocked airflow over the condenser coils
  • Low refrigerant charge
  • High ambient temperatures
  • Dirty condenser coils

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure the outdoor unit's air intake and outlet are completely clear of obstructions.

  2. 2

    Clean the condenser coils if they appear dirty.

  3. 3

    Verify the outdoor fan is functioning correctly.

  4. 4

    If the problem persists, a technician should check refrigerant levels.

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