Update your semi's AC unit with routine maintenance and servicing, with the OTR Heavy Duty A/C Master Service Kit with Expertise Built In™. This replacement kit includes numerous key AC components such as O-rings, washers, and an adjustable front block - ensuring that your vehicle is prepared for the journey ahead. Manufactured with durable components to withstand demanding operating conditions. The air conditioning and heating system in heavy duty trucks has a major impact on drivers’ safety and comfort level. Whether you are looking for A/C compressors, condensers, driers, freon, or blower motors, FleetPride has the part you need to make sure your air conditioning and heating are well maintained. Keep your heavy duty fleet operations working as productively and efficiently as possible by finding the right air conditioning and heating part for you. FleetPride is your First Click in Heavy Duty®.