Also, with the A/C off and the aux fans running is the air that exits the radiator hot? Again, if the thermostat is good and the air exiting the radiator is not hot suspect a dirty radiator. You could try to flush and clean the system yourself, send the radiator out to a shop to be professionally cleaned, or if the radiator is original, replace it. You will still need to flush the system but IMO even an 8 yr. old plastic MB radiator is living on borrowed time. Mark[/QUOTE]

I will check the thermostat today and also the exit air temp. I was afraid someone would suggest a plugged radiator might be the problem.

Ray