Thermo King Air Filters (5)

Thermo King air filters for refrigeration unit engines, covering primary air filter elements for Thermo King Precedent, SLXi, SLXe and UT model refrigeration units. In stock for next-day UK delivery or same-day collection.

  • Fleetguard AF1658K Air Filter

    Fleetguard AF1658K Air Filter

    SKU: AF1658K

    Fleetguard® AF1658K air filter offers more filtering surface than standard air filters, is located above the engine to draw cool, clean air, needs less maintenance time and cost, and has easy filter removal.
    £13.23 ex. VAT
    £13.23 ex. VAT
    In stock Click & Collect Same Day Delivery
  • P822686 Donaldson Air Filter - Plant, Agricultural & Thermoking Applications
    Sold out

    P822686 Donaldson Air Filter - Plant, Agricultural & Thermoking Applications

    SKU: P822686

    AIR FILTER, PRIMARY RADIALSEAL
    Why Choose Donaldson RadialSeal™ Filters?
    Reliable, leak- resistant Radial Seal™ keeps filters in place – even under heavy vibration.

    Outer Diameter 89.8 mm (3.54 inch)
    Inner Diameter 44.9 mm (1.77 inch)
    Length 179 mm (7.05 inch)
    Efficiency 99.9
    Efficiency Test Std ISO 5011
    Family FPG
    Type Primary
    Style Radialseal
    Brand RadialSeal™
    Media Type Cellulose

    • High-efficiency cellulose media performs across a wide range of heavy-duty engine applications.
    • Corrosion resistant, coated steel liners support media during operation and help maximize airflow.
    • Pleatloc™ feature ensures uniform pleat spacing and prevents media from bunching to promote longer service life.
    £11.60 ex. VAT
    £11.60 ex. VAT
  • Fleetguard AF25550 Air Filter

    Fleetguard AF25550 Air Filter

    SKU: AF25550

    Fleetguard® AF25550 premium Magnum RS™ radial seal primary air element is designed to meet the rugged demands of equipment operating in the harshest environments. The Magnum RS offers unique features that provide significant benefits for longer service life and optimum performance when the job demands it. 
    £16.77 ex. VAT
    £16.77 ex. VAT
    In stock Click & Collect Same Day Delivery
  • Fleetguard AF25307 Air Filter

    Fleetguard AF25307 Air Filter

    SKU: AF25307

    Fleetguard® AF25307 panel air filter provides optimized airflow designed with OEM requirements. Protect your investment and extend the life of your equipment with a filter that delivers superior protection.
    £16.86 ex. VAT
    £16.86 ex. VAT
    In stock Click & Collect Same Day Delivery
  • Fleetguard AF25119 Air Filter

    Fleetguard AF25119 Air Filter

    SKU: AF25119

    Fleetguard® AF25119 premium air filter is installed in front of the carburetor or intake pipe to remove dust and sand in the air and ensure sufficient and clean air in the cylinder.
    £45.08 ex. VAT
    £45.08 ex. VAT
    In stock Click & Collect Same Day Delivery

Thermo King air filters for refrigeration unit engines

The air filter on a Thermo King refrigeration unit engine keeps the engine clean and efficient across the high operating-hour demands of continuous refrigerated transport. Thermo King units run their engines independently of the towing vehicle and accumulate hours quickly on multi-drop distribution and long-haul cold chain operations. Air filter replacement at the correct service interval is essential for maintaining fuel efficiency and engine longevity.

Air filter elements for Thermo King Precedent, SLXi and SLXe units are available as OE and OE-specification aftermarket parts. The filter housing location and access procedure varies between unit types. On most Thermo King models, the air filter is accessible from the unit side panel without removing major components. Confirm the unit model and serial number before ordering to ensure the correct element is supplied for your specific housing type.

Call our team with your Thermo King unit model and serial number to confirm the correct air filter element. UK nationwide delivery or same-day collection from our branches.

Frequently asked questions

How often should Thermo King air filters be replaced?

Thermo King recommends replacing air filter elements at 2,000-hour service intervals under normal conditions. Units operating in dusty or high-particulate environments may require more frequent inspection and replacement. Always refer to the maintenance manual for your specific unit model, as intervals vary between Precedent, SLXi and SLXe configurations.

Where is the air filter located on a Thermo King unit?

On most Thermo King Precedent and SLXi units, the air filter is located in a housing accessible from the driver-side panel of the refrigeration unit. The housing is typically secured with quarter-turn fasteners. Refer to the unit's maintenance guide for the exact location and access procedure for your specific model.

Can I clean and reuse a Thermo King air filter?

Thermo King does not recommend cleaning and reusing air filter elements. Paper pleated elements cannot be effectively cleaned without risk of damage to the filter media. Replace the element at the scheduled service interval or when the restriction indicator, if fitted, signals replacement is required.