Call the PO and find out if he has wired in a manual switch. Some guys don't want to spend the money for a thermal switch. Best way to verify fan operation, is, well, fan operation.
mine runs about a good quarter in 80 degree weather at highway speed. Higher at stop, then it settles when I move.Check the level of your coolant and look at the radiators and make sure they're not full of bugs or leaves
That's true for the 1800 (the 15mph limit) but not the 1500. The fan will come on whenever the temp gets warm enough; regardless of speed.Fan will not come on over 15MPH