Remote start and EMTC (Electronic Manual Temperature Control)...

When the remote start feature is used, the climate control system automatically sets certain parameters in an attempt to achieve a comfortable cabin temperature. These parameters are set based on outside air temperature. During remote start, the outside air temperature is continually evaluated and HVAC system behavior can change if the outside air changes between cold, moderate and warm temperatures.

For cold ambient air temperatures (below 0°C (32°F)):

-the airflow mode is set to FLOOR/DEFROST.
-the temperature is set to full HOT.
-the blower speed is set to HIGH.
-the air inlet mode is set to fresh air.
-the auxiliary electric heater is enabled if needed (diesel engines only) (if equipped).

For moderate ambient air temperatures (between 0°C (32°F) and 27°C (80°F)):

-the airflow mode is set to the last user setting.
-the temperature is set to the last user setting.
-the blower speed is set to the last user setting.
-the air inlet mode is set to the last user setting.
-the auxiliary electric heater is enabled if needed (diesel engines only) (if equipped).

For warm ambient air temperatures (above 27°C (80°F)):

-the airflow mode is set to MAX A/C.
-the temperature is set to full COOL.
-the blower speed is set to HIGH.
-the air inlet mode is set to RECIRC.
-the auxiliary electric heater is not enabled (diesel engines only) (if equipped).