Some models of the Ford F-150 are equipped with a cabin air filter that prevents dust and pollen from entering the cab of the truck. Ford recommends replacing the filter at least once per year or after every 10,000 miles. If the F-150 is often driven in dusty conditions, the filter should be inspected and replaced more frequently. A clean cabin air filter improves air flow in the air conditioning system.
Step 1: Open the glove compartment and remove its contents.
Step 2: Remove the two screws on the inside top of the glove compartment to unhook it from the dash.
Step 3: Pivot the glove box down toward the floor of the F-150 to expose the cabin filter housing.