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Thread: AC and blower speed problems

  1. #1
    Join Date
    May 2013
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    AC and blower speed problems

    My 2003 is has a blower that will only work and high and the AC compressor will not engage. This problem came all at once. Where and what do I need to look to find out how to getting is to work again.

  2. #2
    Join Date
    Oct 2010
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    Fan speed is a common problem...blower motor resistor which is located on the firewall behind the egr valve. It's the little black box. When was the last time you ran your air cond?
    Compressor not running could be because you may be low on freon. Quick check is to jump the low pressure switch
    VMARAUDER -
    2004 Dark Toreador Red
    Simply called "The Red Car", Build Date 4-20-2004, #2618 of 3214, #849 of 980 in DTR, Stainless Works LT Headers with SW Full Exhaust, Ford Racing 4.10 Gears, Carbon Clutches, Dyno by Modern Muscle, Mo's Speed Shop Tune, 277 rwhp 296.43 torque, Moonroof, Rear Spoiler, K&N CAI, Alpine CDA-117 CD Receiver, PAC SWI-JACK Steering Wheel Control , Rear Spoiler, Viper Alarm, From Sparta Performance...Rear Upper and Lower Control Arms, Watts Link, Stainless Steel Brake lines, Raybestos R300 S Groove Rotors with Advance Tech Ceramic Pads, Pro-Gard



    It Ain't What You Got It's The Way You Use It


    New DD 2014 F150 Lariat - EcoBoosted
    and 2013 Lincoln MKX
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    RIP 1990 Lincoln Town Car Cartier 295k miles

  3. #3
    Join Date
    Jun 2011
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    It's actually called the BCM, Blower Control Module.. As said,passengr side on fire wall near cam cover. You can do a a little test but turning car on and A/C on and then give it a good rap with like the handle part of a screw driver. If the A/C now works, then that s your problem..

    Link to fix it yourself if that is the problem.
    http://mercurymarauder.net/forums/sh...ad.php?t=48707
    2004 SB Ported Trilogy 48
    Has supporting mods and stuff
    Thanks to Marty O for his help in updating this car.

    R.I.P.
    Rex "SC Cheesehead"

  4. #4
    Join Date
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    780
    Quote Originally Posted by RubberCtyRauder View Post
    It's actually called the BCM, Blower Control Module.. As said,passengr side on fire wall near cam cover. You can do a a little test but turning car on and A/C on and then give it a good rap with like the handle part of a screw driver. If the A/C now works, then that s your problem..

    Link to fix it yourself if that is the problem.
    http://mercurymarauder.net/forums/sh...ad.php?t=48707
    I did read that the compressor will not run, is the BCM in the compressor circuit?
    I missed the location though I meant to say beneath the vacuum valve
    VMARAUDER -
    2004 Dark Toreador Red
    Simply called "The Red Car", Build Date 4-20-2004, #2618 of 3214, #849 of 980 in DTR, Stainless Works LT Headers with SW Full Exhaust, Ford Racing 4.10 Gears, Carbon Clutches, Dyno by Modern Muscle, Mo's Speed Shop Tune, 277 rwhp 296.43 torque, Moonroof, Rear Spoiler, K&N CAI, Alpine CDA-117 CD Receiver, PAC SWI-JACK Steering Wheel Control , Rear Spoiler, Viper Alarm, From Sparta Performance...Rear Upper and Lower Control Arms, Watts Link, Stainless Steel Brake lines, Raybestos R300 S Groove Rotors with Advance Tech Ceramic Pads, Pro-Gard



    It Ain't What You Got It's The Way You Use It


    New DD 2014 F150 Lariat - EcoBoosted
    and 2013 Lincoln MKX
    1998 Grand Marquis GS 175K Sold at 199k
    2001 Lincoln Town Car Gave away at 251k
    RIP 2003 Garnd Marquis LS 280k miles
    RIP 1990 Lincoln Town Car Cartier 295k miles

  5. #5
    Join Date
    Sep 2002
    Location
    Cape Cod, MA
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    13,676
    No, the BCM is not in the compressor circuit. It sound like there are 2 separate issues.
    The Blackbird
    Trilogy #61
    Driveway Queen

    The Spruce Goose
    2004 Grand Marquis LS Limited Edition
    Daily Driver

  6. #6
    Join Date
    May 2013
    Location
    New Port Rickety
    Posts
    91
    Thanks to all who replied, little low on 134R and blower motor control module went bad all at once. All fixed now!

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