Nissan Sentra owners have reported 2 problems related to defogger controls (under the visibility category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Nissan Sentra based on all problems reported for the Sentra.
If the heat/air selector is positioned to defrost the air conditioner compressor runs until the engine is turned off. This makes it more difficult to make the car comfortable and wastes gas. When I took it to the dealer, he affirmed that the car was designed to work this way.
See
all problems of the 2006 Nissan Sentra
🔎.
Above about 35 or 42f the air cond runs if the air selector is positioned on any selection that includes defrost, and the only way to turn this off is to turn the air selector to a position that does not contain defrost, pull over, stop the vehicle, turn the ignition off, then restart the vehicle. I am not mistaken, I am positive of this. This is not green, the air is often running all day wasting gas mileage putting more pollution in the air. Heater must be turned on to compensate for the cooling effect of the air conditioner.