Control System Logic: Defrost

When DEFROST is selected:

• the mode doors direct airflow to the defroster duct and side window demisters. A small amount of airflow from the floor duct is present.
• the recirculated air request button is disabled. The air inlet door opens, admitting only outside air into the passenger compartment.
• the A/C request button (if equipped) indicates the last status and the indicator can be toggled. To reduce fogging, the A/C compressor operates automatically, regardless of indicator status, if the outside temperature is above approximately -6.6 °C (20 °F).
• blended air temperature is available.
• the blower motor is on.