Spent some time poking around in here trying to find reasons for my loud fan and one of the first things the community recommended was checking the coolant level. That is low in my truck. Can I just add coolant (mixed with the proper amount of water) to the reservoir? All the comments I've...

I have a 2013 Ford F150 with a 3.5 Ecoboost engine that I am having a problem with. When I start my truck in the morning the coolant fan comes on full blast after a couple of seconds and stays on until I turn the truck off. It makes no difference if I have the defrosters on inside the cab or...