David B Houston , TX July 09, 2018 Appliance: Frigidaire Room Air Conditioner FRA186MT21 Frigidaire Air Conditioner Fra186mt21: Window a/c fan continued to run with the power button off and no display. How to replace Air Conditioner Touch Pad Control Board. Replaced the PC board Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes