Control System Logic: Defrost

When DEFROST is selected:

• the recirculated air request button is disabled. The air inlet door opens, allowing only outside air into the passenger compartment.
• 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 A/C  is on in defrost. The A/C  compressor operates as long as the outside temperature is above approximately -2.2°C (28.4°F).
• blended air temperature is available.
• the blower motor is on and the speed is adjustable.