Some 2018-2020 F-150/Expedition/Navigator/F-Super Duty vehicles may exhibit a water leak on the right front floor during or after the air conditioning (A/C) is used. This may be due to condensation from the evaporator drain tube entering the vehicle through the drain tube seal. To correct the condition, follow the Service Procedure steps to install an elbow on the evaporator drain tube to direct condensation away from the seal.