1. Remove the instrument panel lower. 
2. Disconnect the power transistor connector.
3. Remove the two screws and remove the power transistor.
HVAC SYSTEM (HEATER, VENTILATOR AND A/C) > Power Transistor (Auto A/C Model)
1. Remove the instrument panel lower.
2. Disconnect the power transistor connector.
3. Remove the two screws and remove the power transistor.