Why does 2006 Nissan Sentra ac only puts out heat but not cooling air?

If a 2006 Nissan Sentra's AC is only blowing hot air, it could be due to several issues. Common causes include low refrigerant levels, a faulty AC compressor, or a malfunctioning blend door actuator that controls the temperature mix of air. Additionally, a clogged cabin air filter or a problem with the AC control module could also be contributing factors. It's advisable to have a qualified mechanic diagnose and address the issue.