2012 Dodge Challenger Owner Manual SRT8 - Page 250

248 UNDERSTANDING YOUR INSTRUMENT PANEL defrost/floor mode. Attempting to use the recircula- Operating Tips tion while in these modes will cause the LED in the NOTE: Refer to the chart at the end of this section for control button to blink and then turn off. suggested control settings for various weather condi• Most of the time, when in Automatic Operation, you tions. can temporarily put the system into Recirculation Summer Operation Mode by pressing the Recirculation button. However, The engine cooling system in air-conditioned vehicles under certain conditions, while in Automatic Mode, must be protected with a high-quality antifreeze coolant the system is blowing air out the defrost vents. When to provide proper corrosion protection and to protect these conditions are present, and the Recirculation against engine overheating. A solution of 50% ethylene button is pressed, the indicator will flash and then turn glycol antifreeze coolant and 50% water is recommended. off. This tells you that you are unable to go into Refer to "Maintenance Procedures" in "Maintaining Your Recirculation Mode at this time. If you would like the Vehicle" for proper coolant selection. system to go into Recirculation Mode, you must first move the Mode knob to Panel, Panel/Floor and then press the Recirculation button. This feature reduces the possibility of window fogging.