George, there is a large strip fuse in a separate housing to the front of the main fuse box and close to the fender. The fuse for the fan is in there. Open it up and remove the fuse element and inspect it. I'll bet it's corroded, or partially open. I would start there. Believe it's a 30 amp item..
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.