What are the reasons for the Nissan Sylphy's air conditioner suddenly not blowing air?
2 Answers
There are three reasons why the air conditioner is not blowing air: 1. Blower problem: The blower is the core component of the car's air conditioner's ability to blow air. If it is damaged, the car's air conditioner will definitely not blow air. The cause of blower failure may be due to internal coil overheating damage or capacitor damage. You can determine if there is a fault by turning the car's air conditioner speed and air volume to the maximum and listening for the sound of the blower. 2. Air duct blockage: The outside air is filtered through the air conditioner filter before entering the car, which can trap many airborne particles, making it prone to blockage. 3. Control system failure: If the above reasons do not apply, then the control system is at fault. The air door, control switch, or the car's air conditioner computer could be the cause of the failure.
My car is a Nissan Sylphy, and I've encountered the issue of the AC suddenly not blowing air multiple times. The most common causes are a faulty or stuck blower motor. The AC system's blower in the Sylphy operates under high temperatures year-round, and over time, bearing wear can easily lead to problems. Another possibility is a blown fuse, located in the cabin fuse box—just check the fuse corresponding to the AC blower and replace it if melted. If the air ducts aren't blocked, a dirty air filter might also restrict airflow. I recommend first removing the air filter to inspect and clean it. Additionally, poor contact in the AC control switch could be the issue—if pressing the AUTO button doesn't respond, check the contacts. Lastly, don't overlook a short circuit, especially after rain when connectors may oxidize. Untreated, this can worsen. It's best to have a mechanic test the circuit with a multimeter for safety. If the airflow stops suddenly while driving, I open the windows to relieve the heat and head straight to a repair shop.
