I have a 2017 Buick Encore , with about 114k miles on it. I have this issue that comes and goes . It started last summer where occasionally the what I believe is the radiator fan won’t shut off even after the car is off. I have left it going for over an hour and still was going. I end up unhooking the battery and reattaching when I have to leave. I’ve tried pulling every Fan fuse I can find and nothing. The temperature seems fine right in the middle.
I have noticed it only tends to do it on super hot days , like today it’s 90 degrees out . And never does it during the winter.
I had maintenance done on it and fixed everything they found but unfortunately this issue still is happening.