Monte J Weatherford , TX June 28, 2020 Appliance: LG Room Air Conditioner LW1516ER/00 Lg Room Air Conditioner Lw1516er/00: Window ac unit compressor stayed running, even after ac was turned off. How to replace Air Conditioner Main Control Board. Changed out the circuit board. 8 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes