Save Your Car's AC with a $15 Cabin Air Filter

You turn the air conditioning to maximum. The fan is on high. You hear the blower motor roaring. But the air coming out of the vents is barely a whisper. Weak. Pathetic. You assume the worst: the compressor is failing, the system is leaking, a costly repair is imminent.

Before you panic, before you spend hundreds on diagnostics, there is a $15 part hidden behind your glove box that is almost certainly the culprit. The cabin air filter is the most neglected, most overlooked, and most betrayed component in your car. And it is taking your AC system down with it.

Here is why a clogged cabin air filter is sabotaging your air conditioning—and how five minutes of work can save you a fortune.