See also:

Rear window defroster switch
For more information about the rear window defroster switch, see “Rear window and outside mirror defroster switch” in the “Instruments and controls” section of this manual. ...

Temperature
A temperature increase will accelerate the rate of corrosion to those parts which are not well ventilated. ...

Changing engine coolant
A NISSAN dealer can change the engine coolant. The service procedure can be found in the NISSAN Service Manual. Improper servicing can result in reduced heater performance and engine overheating. ...