Remove the screws from the sides of the upper condenser fan shroud. Pull the upper condenser fan shroud up and off of the air conditioner.
Remove the screws from the back base of the air conditioner casing that hold the condenser in place.
Carefully pull the condenser up and out of the air conditioner casing and swing it slightly back to access the condenser fan blade.
Remove the hex nut on the end of the fan motor shaft, using a wrench. The hex nut is reverse threaded which means turn the hex nut clockwise to remove the hex nut.
Pull the lock washer and flat washer off the end of the condenser fan motor shaft.
Pull the fan blade off of the end of the shaft.
Warning: The refrigerant lines are connected to the condenser, so take care not to crack or break the refrigerant lines when swinging the condenser up and out of the way. The condenser only needs to be moved far enough to access the condenser fan blade and motor.