Went out yesterday for a 250 mile ride. Over 3/4 of the way through and after a stop for a bite to eat I drove accross a lake and the temperature light came on. There was plenty of snow and I checked it out and the engine was not hot, the coolant was not hot and everything seem to work fine. I monitored it driving the rest of the way home with the light on with no apparent ill effects. I wen tout this mroning started the sled and it did not come on. What is the significance of this light as I have been told it is a water temperature light sensor that really has little or no bearing on a problem. I have a hard time believing thsi light woudl be there for no real reason and am concerned. Any insight would be appreciated.