Methods and systems for controlling an accessory powered by an auxiliary power unit of a vehicle are provided. The method includes a control module determining when a primary power source of a vehicle is deactivated. The method also includes the control module determining when an auxiliary power unit is activated after deactivation of the primary power source. Also, the method includes the control module automatically controlling the accessory powered by the auxiliary power unit when the control module determines that the primary power source is deactivated and the auxiliary power unit is activated.