///Audience
Ready to race!
I realize this is a common question with the answer being that it's a way for the motor to cool off after a hard run or a long drive in the heat.
My question is, what makes the engine decide to do this? I made my usual commute today and for the first time since owning the car (6 months), the fans stayed on when the engine was shut off. I knew this was a VW feature and thought little of it. 5 hours later, the engine has fully cooled down and I moved it from my parking lot inside my bay at work (100 feet and about 30 seconds of drive time). After shutting it off (temp gauge was showing low temps), the fans stayed on. I let it sit another hour, turned it on and turned it right off and the fans stayed on again. I then drove home in the rain (30 minute drive) and the fans are still on after car is shut off.
What is the protocol that tells the fans that they need to stay on?
My question is, what makes the engine decide to do this? I made my usual commute today and for the first time since owning the car (6 months), the fans stayed on when the engine was shut off. I knew this was a VW feature and thought little of it. 5 hours later, the engine has fully cooled down and I moved it from my parking lot inside my bay at work (100 feet and about 30 seconds of drive time). After shutting it off (temp gauge was showing low temps), the fans stayed on. I let it sit another hour, turned it on and turned it right off and the fans stayed on again. I then drove home in the rain (30 minute drive) and the fans are still on after car is shut off.
What is the protocol that tells the fans that they need to stay on?