If you have trouble with the Frigidaire ffra0511r1e air conditioner buttons not working, It may be due to the fuses located inside the unit. • Turn off the unit and unplug the power supply. • Unscrew the screw in the upper right-hand corner of the unit, and pull the controls apart. • Unscrew the screws holding the fuses in place. • Replace the fuse with a replacement of the same amperage. • Reassemble the controls. • Turn on the power supply. If the problem persists, you can have your unit serviced.