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Thread: Weak Airflow On High On AC Or Heat

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    Joshlip44's Avatar

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    Weak Airflow On High On AC Or Heat

    My airflow on my AC and Heat is weak, in my opinion, compared to my work power stroke.

    Is this normal for a 2014 Cummins, or should I dig into the system to check for blockage?

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    ********* watersupply189's Avatar

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    Re: Weak Airflow On High On AC Or Heat

    What do you mean by weak?

    Is it hardly blowing air in all vent positions or just a particular one?


    2016 Ram Laramie 3500, G56, 6.7, CC, 4x4

    2016 RAM 3500 4x4 Laramie Crew Cab
    Cummins,G56, Rough Country level, Morimoto LED fog lights, Diode Dynamics 35W HID headlights, Lund Attitude Steps w/Line-X, DRL's Activated, 35x11.50R18 Falken Wildpeak, Fuel Vapor Wheels Matte Black w/Dark Tint, A.R.E. Truck cap

    2015 Jeep Grand Cherokee Limited 4x4
    2019 Dodge Charger 392 R/T Scatpack Plus

    Past - 2014 RAM 1500 4x4 Lone-Star Eco Diesel

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    DANG IT'S COLD! AK Bob's Avatar

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    Weak Airflow On High On AC Or Heat

    Hard to describe airflow without using a flow meter.

    I also have a 2014 but don’t have a power stroke to compare it with.

    I would say the airflow is sufficient but doesn’t exactly blow your hair around.

    I took some photos with the air set to blow forward, and all the vents open on setting 1, 3, and 7 with a piece of notepaper attached to try and give you some idea.








    2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit, and 50 Gallon auxiliary fuel tank.

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    2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. MM3 Tuned by Double R Diesel. Oil Bypass Filter, Fuel Filtration Kit, and 50 Gallon Aux Fuel Tank.

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    Chrisn162001's Avatar

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    Re: Weak Airflow On High On AC Or Heat

    Does your truck have a cabin air filter?

    If not the evap core is probably clogged.

    Super common issue.

    If you find out it is the evap core install a cabin air filter kit when you swap it out.


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    DIESELWRKS's Avatar

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    Re: Weak Airflow On High On AC Or Heat

    Did you recently buy this truck?

    Do you know anyone that has a similar truck to compare?

    Look in the glove box back and see if you have a cab filter.

    You will see a door/flap.

    Lookup on Google or youtube on how to open.

    If you don't have a cab filter, @genos garage sells the kit so you can install one.

    It's not that hard of a job.

    Due to destructive fires in my area and going on a long road trip in many states with deadly fires.

    The ash and junk in the air affected my airflow, and I changed out the filter.

    The filter had less than 5k miles on it prior.

    2017 WON TON CC LB 68AUTO
    DRD Diet program. Thuren 2.25 w/2.0 Fox Resi

    Justin
    Southern Oregon ( the Republican part)
    UNITEDSTATES MARINE CORPS 1993-2007
    No better friend, No better enemy.

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