Kenneth R Clearwater , FL August 23, 2021 Appliance: LG Room Air Conditioner LW1216ER/00 Lg Room Air Conditioner Lw1216er/00: The compressor would stay running after pushing power button to off. How to replace Air Conditioner Main Control Board. Replaced the main printed circuit board. All is well for now. 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes