I have a 2013 f150 5.0, been great just the last couple of weeks whenever I use my cab blower fan, 30 seconds after I turn it on the rad fan goes into turbo mode and stays on until I shut the truck off or about after a minute of turning off the blower, I can run the truck all day long, no issues, just when I turn on the heat, any ideas?

 

If you are in defroster mode, it turns on the AC compressor and the fans should run.

 

it does it on any setting, a/c and heat

 

There are 2 fuse/relays: check these. Then check your antifreeze levels if OK then check your ac system by removing and weighing the correct R134A charge. Did the AC system work correctly during the summer? If all is good then, maybe time for a dealer trip.