Hi there - original owner of 2020 EX Telluride, 50K miles, still under warranty. Recently discovered the cooling fan randomly starts about 2 minutes after car is turned off. Revs at high speed and runs for hours. Ran all night in the garage and drained the battery. Has happened 3 times. Took it to dealer, they can't replicate it, so won't fix it. Has anyone experienced this? How can we get the dealership to fix it without replicating the problem?