Hot Air Purge

Warm moist air can accumulate around the evaporator (from the previous A/C operation and/or from the heat soak from the sun) during engine start up in warm weather. The H-A/C control disables the blower motor for 5 seconds while the mode valves position to divert the air to the floor outlets to divert this undesirable air from the driver's face. The H-A/C control sets the blower motor on low for 30 seconds to purge the air from the module before returning to the AUTO mode after positioning the mode valves.