I had been idling for a minute today to check tires before I parked in my usual spot. It's about 90 degrees and I just drove 45+ miles. Noticed the cooling fan kicked on, which didn't surprise me, but I noticed the fan shut off with the engine. I expected it to continue to run for a few minutes. Is this normal? Thanks, I don't usually idle long when I stop so didn't know how these systems work.