2010 Dodge Nitro Owner Manual - Page 286

UNDERSTANDING YOUR INSTRUMENT PANEL 285 • Most of the time, when in Automatic Operation, you can temporarily put the system into Recirculation Mode by pressing the Recirculation button. However, under certain conditions, while in Automatic Mode, the system is blowing air out the defrost vents. When these conditions are present, and the Recirculation button is pressed, the indicator will flash and then turn off. This tells you that you are unable to go into Recirculation Mode at this time. If you would like the 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. Operating Tips Summer Operation The engine cooling system in air-conditioned vehicles must be protected with a high-quality antifreeze coolant to provide proper corrosion protection and to protect against engine overheating. A solution of 50% ethylene glycol antifreeze coolant and 50% water is recommended. Refer to "Maintenance Procedures" in "Maintaining Your Vehicle" for proper coolant selection. Winter Operation Use of the air Recirculation Mode during winter months is not recommended because it may cause window fogging. 4 Vacation Storage Anytime you store your vehicle, or keep it out of service NOTE: Refer to the chart at the end of this section for (i.e., vacation) for two weeks or more, run the air suggested control settings for various weather condi- conditioning system at idle for about five minutes in the tions. fresh air and high blower settings. This will ensure