CodeRegistry
Brands
  1. Home
  2. Lennox
  3. Air Conditioning
  4. PC08
About·Privacy·Terms

CodeRegistry — Your global library for technical solutions.

For your safety: always follow the equipment manufacturer’s official manuals. CodeRegistry is an independent help site and is not affiliated with the brands listed here.

PC08

PC08 — Outdoor over-current protection

Lennox · Air Conditioning

What does PC08 mean?

The outdoor unit is experiencing an over-current condition. This means too much electrical current is flowing through a component, triggering a safety shutdown.

Common Causes

  • Compressor overload
  • Motor issue
  • Electrical short circuit
  • Voltage fluctuations

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check that the unit is receiving stable and correct voltage.

  2. 2

    Ensure no obstructions are straining the outdoor fan.

  3. 3

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

  4. 4

    If the error reoccurs, contact a technician to inspect the compressor and electrical system.

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