While driving at speed between 60 to 75 mph the cruise control stops working although the indicator for on/off shows a green light for on status. When pressed the set button to re-engage cruise control, the system does not set and hold the desired or any speed. When I made a 10 minute stop for gas after driving for 1 hour during which the cruise control stopped working I resumed my 2 hour trip. The cruise control worked for 5 minutes but shut off again even though the on/off indicator displayed an on status. Not sure if weather is related to the faulty cruise control but it was a sunny day, ~74 degrees.