A vehicle’s ventilation system is saddled with the duty of pushing air into the cabin of the vehicle. In most vehicles, the vents can pipe in neutral air, heated air, or air-conditioned air. Controls on the center console lets the driver and their passengers to control the type and flow of air, together with its direction. If these vents stop functioning, your car will start to feel stuffy due to the lack of circulation, and you’ll have to rely on the windows to control the temperature inside the vehicle.
Common reasons why this happen:
- Blown fuse: Like many electrical units in your vehicle, the ventilation system depends on a fuse for overcurrent protection. If the ventilation system’s fuse gets blown, then the circuit will stop functioning, and there will be no power for the vents.
- Faulty relay: A bad relay can also be the cause. A relay is a small current that handles a larger current. In this situation, the relay takes a small electrical current and uses it to control the larger current that the ventilation system needs. When the relay stops working, the vents no longer gets the power they require to operate.
- Nonfunctional or damaged blower motor: A blower motor is the motor that transfers the air through the vents in your vehicle. It is very similar to the motor that you’ll find on a leaf blower or a home fan. Blower motors can get faulty or be damaged, which will slow or stop the power of your ventilation system.
- Blower resistor malfunction: The blower motor relies on resistors to control the speed at which air flows through your car’s vents. A resistor essentially limits the output of the blower motor so that you only get as much air as you requested.
- Clogged air intake: It’s equally possible for an air intake to become clogged. Your vehicle has two kinds of air intakes: fresh (air from outside of the car) and recirculated (air from inside the car). If either of these intakes gets partially or totally clogged, your venting system may not work at full capacity.
- Broken hose: There are numerous hoses needed to make a ventilation system work. Any leaks, clogs, or insecure attachments among these hoses can alter the ability of your vents to work properly.
How important is this repairs?
You’re unlikely to do further damage to your car by driving it when the vents aren’t working. The ventilation system is primarily for driver and passenger comfort, but it remains a vital system within the vehicle, so issues with it need an inspection.