After parking the car, when I turn the engine off, the fan for the a/c for the rear passengers turns on for less than a minute. Doesn’t matter if I have the controls set for A/C on/ off for the entire vehicle, rear control on/off, etc. The service dept at the dealer could not reproduce this when we took it in. It was previously sporadic, but now has happened consistently for the last 2 days.
If it’s happening consistently, take it back to the dealer and demonstrate it to them. Leave the car running in the parking lot until the service rep comes outside, then turn off the engine and let the rep see and hear what happens.