What are some of the Nissan Sentra air conditioner problems?

There aren't any air conditioning issues that are specific to the Nissan Sentra but if Your AC isn't functioning properly there are some possible causes that usually apply to most vehicles. The first thing You can do is locate Your coolant reservoir and make sure that the levels aren't beneath the MINImum mark. If they are then add some more of whichever coolant is listed on the radiator cap or in Your owners manual. A leak may be an issue if the coolant is low so keep an eye underneath the vehicle for anything that may be dripping down. Besides that it's possible that the AC compressor clutch has failed but that's difficult to diagnose on Your own so You may want to bring it to Your dealer. -