Quick question yall. I installed an electric fan on the truck. It's a Derale 18" electric fan and flows 2800 or so CFM. I've got an adjustable thermostat on it. The probe is inside the upper radiator hose (I took the radiator hose off, slid the probe, and put the radiator hose back on). The adjustable thermostat is a Flex a lite version (it was a recommended part by Summit Racing). We also installed a 180 degree thermostat. The truck runs cool now. A full 1/4" tick mark below 210. My question is this. While driving, the temp stay low and the fan runs. When I stop and turn the truck off, the fan keeps running and the temp goes up to almost 210. I've adjusted the thermostat up some but it still runs. I plan on having it controlled by the PCM later, but not right now. Why is the fan continuing to run? How long should it run after the truck is cooled off? Thanks a bunch for the help.