how to make your AC blow harder and cooler.

Discussion in 'Tech Info' started by 2drhoeon4s, Jul 19, 2011.

  1. 2drhoeon4s

    2drhoeon4s Full Access Member

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    *****VIDEO*****
    [yt]ZVjGQsoq9BU[/yt]
    Saw this on Full size chevy and thought I would do it on my truck.

    Very easy to do, took me about 30 minutes.

    Disclaimer: I am not responsible for anything you do to your vehicle. This is simply a helpful guideline.

    This applies to all 88-99 GM.. The writeup is on a 99 tahoe 2wd 4dr. The older dash is a bit different so removal of the glovebox and blower motor might be different.

    Tools you will need:

    1. washcloths
    2. Bowl of water
    3. toothbrush
    4. garden hose with spray nozzle
    5. purple power cleaner (dont use high strength degreaser or you will never get the smell out.
    6. Gloves
    7. 9/32 socket and extension
    8. Patience
    9. Air Freshener (optional)


    [​IMG]

    [​IMG]
    Ok here is how it goes

    step 1.

    FIGURE 1
    [​IMG]

    open your glovebox and remove it. once it is open you simply squeeze the sides in towards eachother until the tab in figure 2 clears the side.

    FIGURE 2
    [​IMG]

    Once the glovebox is removed, it should look like this..

    FIGURE 3
    [​IMG]

    Step 2.
    Locate the blower motor.. It is to the right side of the opening, near the kick panel. It is round. (FIGURE 4)

    FIGURE 4
    [​IMG]

    Step 3.
    Remove the 2 wires that power the blower motor.(FIGURE 5) one will be purple with a white clip and one will be black. Remember which wire goes to which terminal.

    FIGURE 5
    [​IMG]

    Step 4.
    Once the wires are removed, proceed to remove the blower motor cover. It is simple to remove and slides right out. (FIGURE 6)

    FIGURE 6
    [​IMG]

    Step 5.
    Take your 9/32 socket and extension and remove the 5 screws holding the blower motor in. Take your time, the top 2 screws are the hardest. There is also a screw holding a ground tab onto the motor. No need to remove it.

    FIGURE 7
    [​IMG]

    Step 6.

    Once all the screws are removed, proceed to pull the blower motor out. It is not that difficult, but it will require a bit of persuasion. it seems to get snagged on the brace that runs across the backside of the dash. (FIGURE 8, 9, and 10)

    FIGURE 8
    [​IMG]

    FIGURE 9
    [​IMG]

    FIGURE 10
    [​IMG]

    Step 7.
    once the motor is removed, locate the coil to the upper left side of the opening inside the blower motor housing. (FIGURE 11, 12)

    FIGURE 11
    [​IMG]

    FIGURE 12
    [​IMG]

    This is what my coil looked like when I opened it up.

    FIGURE 13
    [​IMG]

    Step 8.
    Place a washcloth below the coil housing on your floorboard. It will catch and dripping that comes out of the housing.

    Step 9.
    Put on your gloves!! Then reach your hand into the opening and feel around for leaves or any other large debris that are lodged in the housing. Mine were all across the bottom and back side. Remove as much as possible with your hands. ( it is best to have small hands or let the wife do this, as I found it is hard to get my hand in the right position to pick up stuff. a small flathead screwdriver helped loosen the debris attached to the wall of the housing.

    This is what I removed from mine.


    FIGURE 14
    [​IMG]

    Step 10.
    Once the large debris is clear, spray your cleaner (purple power or simple green) up onto the coil heavily and let it soak in for a few minutes.

    Step 11.
    Take your bowl of water and a toothbrush and reach into the housing and scrub the coils. it helped me to cut the toothbrush into a smaller handle to reach all areas. Once again it helps to have small hands. Rinse the brush every few seconds of scrubbing in the bowl of water.

    Step 12.
    Take your garden hose and set the nozzle on either Jet or center spray.
    aim it up into the housing and lightly spray your coils to rinse them off.. You can spray them heavily, but it is best to start off light until you get comfortable spraying a hose into that small area.
    (dont worry about the water, most of it will drain out the drain line that is built into the housing (outside of the cab), however a small bit will drip through the seal in the bottom of the housing inside the cab, which your washcloth should absorb.)

    Keep rinsing until your water draining out is clear.

    Step 13.
    Repeat steps 10-12 until you feel that the coils are clean to your liking.

    Here is what mine looked like when I was finished.


    FIGURE 15
    [​IMG]

    Assembly is the exact reverse of taking it apart.

    Step 14.
    Wipe the inside of the housing with a washcloth to clean any leftover residue.

    Step 15. (optional)
    Spray an air freshener or cologne into the housing. This will add a nice smell to your system, and it should last a while.

    Step 16.
    Re install your blower motor, hook up the wiring, and reinstall the cover and glovebox, and you are good to go.
     
    Last edited: Aug 3, 2013
    Miami-Dade likes this.
  2. puckhead

    puckhead Full Access Member

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    Wow thats pretty awesome!
     
  3. jem556

    jem556 Full Access Member

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    Holy crap...that's got to work better now!
     
  4. 2drhoeon4s

    2drhoeon4s Full Access Member

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    yeah it works much better now... the 2 setting blows like the max setting used to.
     
  5. SunlitComet

    SunlitComet OBS Jedi-Do Good

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    you live or drive in a swamp or something?
     
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  6. 2drhoeon4s

    2drhoeon4s Full Access Member

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    haha... I think this truck used to be lifted and went mudding before I bought it.... funny cuz its 2wd and lowered now.. oh well..
     
  7. AtomicHoe094

    AtomicHoe094 Atomichoe094

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    Nice write up!!
     
  8. Freedom Motorsports

    Freedom Motorsports SyntheticMotorsports Supporting Vendor

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    Excellent write up indeed! That is absolutely amazing that there was that much crap up in there. Makes me want to do mine for sure just to make myself feel better...
     
  9. 01HDtahoeNJN

    01HDtahoeNJN Shredding Gnar Daily

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    wonder if this works for 00-06?!?!
     
  10. 2drhoeon4s

    2drhoeon4s Full Access Member

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    if i recall you nbs guys have cabin filters... the only reason ours get this way is no cabin filter..
     

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