Actuator problem

I replaced the actuator for the drivers side, the motor stopped working in the old one. Set it on cold and it seemed to work fine. But when I drove the truck, the actuator when from cold to hot and stayed there. When I restart the motor it goes back to cold for about two minutes and then to hot and stays there. I pulled the fuses and reset them but that did not help. I have restarted at least a dozen times and always the same thing. Got the actuator from Amazon, did I get a bad actuator or is there another sensor somewhere.