CAB FILTERS

Cab Filters For Peterbilt Trucks

Cab air filters — also called cabin air filters or HVAC filters — keep dust, pollen, diesel soot, and road debris out of your Peterbilt's interior ventilation system. On trucks operating in dusty agricultural, construction, or industrial environments, clogged cab filters are one of the leading causes of reduced HVAC airflow and blower motor burnout. Regular replacement keeps air quality high in the cab and protects the blower system from premature failure.

Frequently asked questions about cab filters

How often should I replace the cab air filter on a Peterbilt?

Under normal highway conditions, most manufacturers recommend replacing the cabin air filter every 15,000–25,000 miles or once per year. Trucks operating in dusty off-highway environments — grain elevators, construction sites, unpaved roads — may need filter changes every few months. A good habit is to check the filter at every PM service and replace it when it shows heavy soiling or airflow restriction.

Where is the cab air filter located on a Peterbilt truck?

On most Peterbilt models, the cabin air filter is accessed from behind the HVAC housing inside the cab, typically behind the passenger-side dash panel or beneath the bunk on sleeper models. Some configurations place it in an external housing on the cab exterior. Consult your model-specific service manual or parts diagram to locate the filter housing before attempting a replacement.

Can a dirty cab filter cause my AC to underperform?

Yes. A severely restricted cabin filter reduces airflow across the evaporator core, which limits cooling capacity and can cause the evaporator to ice over. If your Peterbilt's AC seems weak despite the system holding proper refrigerant charge, a clogged cab filter is one of the first things to check — it's a free fix compared to refrigerant service or component replacement.

Other parts you might need

Shop blower components for Peterbilt trucks