2005 Pontiac GTO Base 8 Cyl 6.0L
When the car is off and the keys is out the ignition the air conditioner is still on but blows out hot air.
What could be the problem?
Nissan Technical Advisor 3/10/2011
Your blower motor switch or relay is defective, it keeps running even ignition is off. Check those units and replace them as necessary.