PC42 — Compressor start failure of outdoor unit

What does PC42 mean?

The outdoor unit's compressor is failing to start. This could be due to electrical issues or a problem with the compressor itself.

• Insufficient voltage to the compressor
• Faulty start capacitor or relay
• Internal compressor problem
• Control board issue

Click steps to track your progress.

1. 1

   Ensure the unit is receiving adequate voltage.

2. 2

   Check electrical connections to the compressor.

3. 3

   Reset the unit by cycling power off and on.

4. 4

   If the compressor still fails to start, it likely requires professional diagnosis and repair.