1. TSBs

    Replacing Ram 1500 A/C expansion valve

    Dec. 10, 2024
    This bulletin applies to 2019-2021 Ram 1500 trucks built on or before Nov. 6, 2021, and equipped with air conditioning.
    Related To: Mitchell 1
    Photo courtesy of Chrysler
    Verify proper A/C performance and verify that the whistling noise is gone. Recharge the system using R-1234YF refrigerant.
    Verify proper A/C performance and verify that the whistling noise is gone. Recharge the system using R-1234YF refrigerant.

    This bulletin applies to 2019-2021 Ram 1500 trucks built on or before Nov. 6, 2021 and equipped with air conditioning.

    A whistling noise may be heard after the engine is shut off. Remove and replace the A/C expansion valve P/N 68396043AB. Verify proper A/C performance and verify that the whistling noise is gone. Recharge the system using R-1234YF refrigerant.

    About the Author

    Mike Mavrigian | Motor Age Editor

    Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of  specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.

    Email

    Continue Reading

    Sponsored Recommendations

    How to Properly Lubricate your Air Tools

    Learn how to properly lubricate your AIRCAT air tools to keep them running at peak performance. Discover essential daily maintenance and storage techniques, along with the right...

    Save Time with Standard's Kits & Multipacks

    Stock up on essential repair kits! Discover how Standard's multipacks simplify repairs and reduce downtime.

    Fuel Injection Training – Pro Tips for Techs

    Choosing the right fuel injector matters. Learn best practices for selection and related component recommendations.

    ABS Sensor Insights – Get the Right Fit Every Time

    ABS sensors are critical to vehicle safety. Learn how they interact with electronic systems and how to choose the best replacement.

    Voice Your Opinion!

    To join the conversation, and become an exclusive member of Vehicle Service Pros, create an account today!