See also:

Air recirculation button
Air recirculation button NOTE: The air recirculation feature is available only on those vehicles equipped with air conditioning. On position (Indicator light on): Interior air is recirculate ...

NISSAN dealer.
However, now and then you may notice light spark knock for a short time while accelerating or driving up hills. This is not a cause for concern, because you get the greatest fuel benefit when ther ...

Air conditioner operation
The air conditioner system should be operated for approximately 10 minutes at least once a month. This helps prevent damage to the air conditioner system due to the lack of lubrication. Cooling ...