Cabin Air Filter Replacment

What's a Cabin Air Filter and When Should You Replace It?










A new customer came into the shop the other day complaining about their air conditioner not functioning correctly. It was not blowing very well. Our tech checked it out and found the fan was functioning properly, but the air coming out the vent was not flowing very well. He then thought perhaps the cabin air filter was suspect. He pulled it out and found it almost completely covered in dirt. After he replaced it he found the air conditioner worked fine.

The cabin air filter cleans the air that comes into the interior of the heating, ventilation and air conditioning system. It is designed to catch particles in the air coming through the system.

This filter should be replaced between 10,000 and 15,000 miles depending on the type of driving one does. Check the maintenance schedule in your owner's manual. If you drive in heavy traffic in an urban area or dirt roads, you could need to replace the filter annually or even more often. Some signs that you need a new cabin air filter are reduced air flow through your heating and air conditioning system, such as when you crank up the fan too high and you get more noise than results. Another is persistent bad odors. Even if you don't have these warnings, you should have the filter checked at least once a year, and you may be able to do that yourself.

Most cabin air filters are located behind the glove box and are easily accessible by removing the glove box. Others are located under the dashboard and may not be easy to reach.