Abstract: An auxiliary heating system for a vehicle interacts with an ignition controller having a Run state in which an engine of the vehicle is running and an Off state in which the engine is not running. An auxiliary heater has a Parking mode for heating a passenger cabin of the vehicle when the ignition controller is in the Off state. An auxiliary heater controller has a user-configurable setting for selectably entering the Parking mode when the ignition controller enters the Off state. A manual interface is responsive to a user to provide user commands to the auxiliary heater controller including setting commands during the Run state for determining the user-configurable setting and a cancel command during the Off state for terminating the Parking mode.