General Description

Three purge modes, which are not represented in the system response chart, occur when the system is first turned ON, but only if certain conditions exist. Each of the purge modes improves comfort and reduces the possibility of windshield fogging. In the purge modes, the air flow is redirected at a reduced blower speed until conditions permit the resumption of normal control. The purge modes also control the following functions:
^ Delay the heater blower from turning on.
^ Prevent cool air from exiting through the heater outlets.

Operator selection of any mode, except the AUTO mode, prevents the purge modes from initiating. The purge modes will not initiate if the system operates in a manual mode.