❄️Heat Pump or AC Compressor Running But Condenser Fan Not Working | A1 L3 Error Code Repair Guide ⚡️

In this HVAC troubleshooting and repair video, we diagnose and repair an ACPRO / Gree / Mr. Cool inverter heat pump system in Tustin, California showing an A1 L3 error code. The compressor was running, but the condenser fan motor would not start.
After testing the condenser fan motor windings with a multimeter, we confirmed the motor was good and traced the issue to a failed inverter control board.

In this video, you’ll learn:
✔️ How to diagnose a condenser fan not running
✔️ How to test a condenser fan motor properly
✔️ Difference between bad fan motor vs bad inverter board
✔️ Step-by-step inverter board replacement
✔️ How to transfer jumpers, isolation pads, and heat sink
✔️ HVAC electrical troubleshooting tips
✔️ Safe AC / heat pump repair procedures for inverter systems
This repair applies to many inverter-style heat pumps and air conditioners (AC units) including ACPRO, Gree, and Mr. Cool systems.

🔥 Common HVAC Problems Covered:
Heat pump compressor running but fan not spinning
AC condenser fan motor troubleshooting
Inverter board replacement
Outdoor unit fan not working
HVAC error code A1 L3
Heat pump fan failure diagnosis
Air conditioner repair tips
HVAC repair in Tustin, CA