A clicking noise occurs when the radiator fan is turned on. I checked the fan shroud and verified that the fan is not hitting anything. The clicking only happens when the fan comes on. Normally, there wouldn't be any clicking noise, but the past two days I've noticed this sound. I opened the hood and observed the fan turn on and then make the clicking noise. Also, the car stalled after three clcik noises. Is it possible that the switch at the fan is ready to malfunction?