Well I just got my truck back from the shop. 10 min after i turned my ac on in 90 deg weather it got hot!! It turned on my check gauge light and pulled over real quick shut off ac and it cooled down in like less than a min to reg temp. Drove home unhooked the trailer ran cool all the way with no ac on. Took it to the shop and the fan ate the wires and the fan was loose so 600.00 and it is back together with a new fan and bracket! Now it runs cool on hot days with ac on pulling 3 zero turn mowers up hill, but my fan comes on a lot is that normal?