General Description

When the system is powered up, the heater and A/C programmer initiates one or both of the following functions in order to avoid window fogging or other undesirable conditions:
^ Purge the system of stale air.
^ Redirect the air.

The programmer will determine if any undesirable conditions exist when the ignition is turned on or the Heating, Ventilation And Air Conditioning (HVAC) system is in AUTO or VENT mode.

The programmer has the option of three different purge modes to select from to eliminate undesirable conditions.