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TJ A/C problems

Discussion in 'Wrangler TJ (1996-2006)' started by JeepieNerd88, Jul 5, 2018.

  1. Jul 5, 2018 at 5:59 AM
    #1
    JeepieNerd88

    JeepieNerd88 [OP] Member

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    3in suspension lift 1in body lift Jk 6spd internals in stock housing Tj rubicon wheels
    Ok so I'm having some trouble with my ac in my 06 TJ. When i give it throttle it will stop blowing out the hand vents and will start blowin out the defrost vent and sometimes out the floor but when i left of the throttle to coast it will come back out the hand vents. Also the first and second speeds don't work at all on the fan speed id like to know if that's related and who else has had these problems and what i should do to remedy this situation. I love riding with my doors and windows off but with this humid southern heat its nice to have some ac when you spend the whole day working out in it.
     
  2. Jul 5, 2018 at 6:38 AM
    #2
    Prerunner1982

    Prerunner1982 Well-Known Member

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    The changing vents is due to a vacuum leak. The defrost vent is the default when vacuum is lost.
    The speed issue may be a bad switch or switch connector. The Jeep Cherokee XJ (a lot of same parts as the TJ) had a common issue of melting the blower speed switch connector. Another issue is a blown blower motor resistor however when this goes out you typically loose all speeds except for high.
     
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  3. Jul 5, 2018 at 9:27 AM
    #3
    JeepieNerd88

    JeepieNerd88 [OP] Member

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    Awesome i appreciate it!! Any way to check where the leaks may be?
     
  4. Jul 5, 2018 at 10:23 AM
    #4
    Prerunner1982

    Prerunner1982 Well-Known Member

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    I would start at the vacuum reservoir which I believe may be mounted on the passenger side inner fender under the hood towards the firewall. Rectangle black box with a vacuum line coming from the side. #8 in the image below. Follow the vac line checking for any small cracks. There may be other vacuum lines coming off the intake as well and it wouldn't hurt to check them as well. The leak could also be behind the dash as the vacuum line does enter into the vehicle to control the blend doors.


    [​IMG]
     
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  5. Jul 5, 2018 at 2:43 PM
    #5
    UrbanCowboy

    UrbanCowboy Well-Known Member

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    Suspension: 3 1/2" Rubicon Express SL, 1" BL, Brown Dog MML, D44/D30 with Chromoly axle shafts, SYE, Teraflex belly up pan, Adams Drive Shafts, Currie heavy duty front end (inner and outer tie rods and draglink), Fox Racing 2.0 Performance Shocks with remote reservoir, 4.56 gears, ARB air lockers front and rear, ARB onboard air, 37x12.5 Nitto Trail Grapplers on 17" Mickey Thompson Classics Motor: K&N cone filter and Flowmaster Muffler (not sure what model) Body: Stout Fabrication Body Armor (all 4 corners), steel flat fenders (enlarged inner aluminum fenders front and 4" flare rear), Quadratec LED Stealth headlights, Pro Comp light bar with 5 6" HID Lamps, Round LED brake and reverse lights, custom front and rear bumpers, custom tire carrier with Hi-Lift mount, rock sliders, CJ style dropdown tailgate, Warn 9.5 Ti Winch Interior: Corbeau Baja Racing Seats front and rear with 4 point harnesses. Full custom roll cage, LED dome lights Audio: 2 10" JL W3v2's in a custom bedlined (waterproof) box, Kenwood 600w amp, 2 Kicker 6.5" marine speakers in waterproof SSV Works cans for rear speakers, 2 4x6 Pioneer front speakers, Axios 400w mini 4 channel amp, Kenwood head unit
    I just did fixes on the leaking vacuum line issue a couple of months ago. From the diagram, #2 (both of them), 5, and 8 are the most common areas for a leak. I actually had 2 leaks so it was frustrating when I found one and repaired it, but it didn’t fix the issue. If that happens, keep looking as there is another leak.

    The cheap fix is to use heat shrink butt connectors at the leak spot. Cut the hose, throw both ends into a butt connector, and heat it to seal the line.

    If the line is really bad, you can buy a new vacuum line online for about $12.
     
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  6. Jul 12, 2018 at 7:55 AM
    #6
    cannonball

    cannonball Member

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    I ordered a new vacuum line from Morris 4x4 for about $12. Mines an 04 so I had to take the battery and tray out to replace it but it still only took 20 mins. Fixed the shifting blowing air from defrost/head/feet under load
     
    UrbanCowboy likes this.
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