I am having trouble with my fan running even when the car is parked and turned off. This doesn't happen all the time only periodically. But, if I don't drive the car everyday, it runs the battery down. I have a friend that works as a service mgr, he put a new relay switch in cause we thought that was the problem. But, it is still doing the same thing. Any suggestions Just found out he replaced the fan relay could it be the AC relay?