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Ford Crown Victoria/Mercury Grand Marquis Climate Control

24

Comments

  • re55re55 Member Posts: 6
    I own a 2003 Crown Vic, the heater control went out about 2 years ago, it just went out again. When they go out all heat and air conditioning go to the defroster. Ford tells me this a safety feature. So when it quits you will always has a defroster, the heat and air are only a comfort issue. Nice huh. They are $650.00 and are on back order by 1069 until July 2010, at which time there is supposed to be more than two thousand available. Which tells me they should be put on a recall. When the guy replaced mine 2 years ago he told me they were very poorly designed. To compact area, so over heats and burns out. I'm still looking for the part. The last time I bought the part at a salvage yard for $150.00 and paid $100 to have it installed.
  • re55re55 Member Posts: 6
    my 2003 Crown Vic did the same thing for a couple of months before the heater control went out. now it only blows through the defroster. This the second time my has quit and both times it blew out floor, vent, or defroster and would speed up and then slow down. It didn't matter what it was set on.
  • re55re55 Member Posts: 6
    Its not stuck, your heater control finally quit completely. Ford tells me its a safety feature. When it quits, it goes to defroster. The heater and air are for comfort, but you need a defroster for safety. read my other posts for more info. I have had my heater control replaced about 2 years ago and it just quit again about a month ago,
    There is 1069 on back order, they are supposed to have them in stock in mid July for a price of $650.00. Does this tell you there is a problem with them?
  • re55re55 Member Posts: 6
    Read post #62, #63 #64
    Mine also opened different vents, when I would slow down it would go back to vent or floor, speed up it went to defrost. It did this until it completely quit both times. The new heater control fixed it for almost 2 years. Now it is out again.
  • re55re55 Member Posts: 6
    I was told it was probably a vacuum leak on my 2003 Crown Victoria when it did the same thing. It had nothing to do with the vacuum. It was the heater control. The guy who fixed mine the first time did it in the parking lot while I was in a meeting it took him less than 30 minutes. it worked fine for almost 2 years, It just went out again. looking for the part to fix it. read my other posts for more info on this.
  • pun461pun461 Member Posts: 1
    I have a '03 Mercury Marauder and I just noticed today that my A/C wasn't working. I tried switching to vent, floor, defrost, but nothing would work. I tried turning the fan to various speeds and nothing happened for anything setting. I can hear the compressor kicking on, but only a very little bit of air comes out. It is like it is stuck on low and neither the fan settings or the climate control makes any air come out anywhere. Does anyone have any suggestions? And please tell me it's not expensive. Thanks
  • lovetohuntlovetohunt Member Posts: 1
    I have a 2007 Grand Marque and the blower motor runs at high all the time. I can't get it to shut off at all. the temperature control works fine as I can maintain any temperature I select. can anyone tell me how to cure this problem. Is it the Blower Speed Control Module?
  • hester22hester22 Member Posts: 1
    I recently experienced the same problem on my '06 Crown Victoria, after completely testing the vacuum system, found the Climate Control Unit to be bad. After finding out how much they cost, I started doing some research and found a guy in Los Angeles that rebuilds them and sells them on ebay. He offers a lifetime warranty with them, and even sent instructions for installation. Rather than shipping the core back to him, I stopped by his shop as I live in Southern California, and found that he services fleet vehicles for taxi companies. Solved my problem and I will never have to pay again if it breaks. He also rebuilds lighting control modules and a few other Crown Victoria parts.
  • pat2003pat2003 Member Posts: 1
    My 2003 Marauder blower stopped working suddenly. All else worked. I removed the electronic speed control module right behind the passenger valve cover on the duct. After removeing it, I opened the module. To my surprise the solder had cracked around one of the main terminals. I soldered and put it back together. Now blowing my socks off. Back in service in 60 mins. !!
    I hope this cheap fix helps you. Saved me $150.
  • snorkelbobbysnorkelbobby Member Posts: 19
    edited July 2010
    I just finished fixing a 2003 Grand Marquis for air blowing out the defrost only. This is the goverment mandated failure mode.
    The problem is that the vacuum harness is leaking vacuum where it connects to the back of the conrol head. The vacuum harness connection ports relax after several years. You can replace the vacuum harness (F5VY-19C827-A) $20, or just clamp it tight with 2 ten inch tie straps from the Lowes or Home Depot.
    Pull the trim covering the control head straight out. remove the control head (4 screws). Remove 2 torx screws holding the bottom part of control head in place. Feed a tie strap around this part so it clamps the vacuum harness to the control head. I put one tie strap on either side of the black vacuum supply hose in the center of the harness. Operate the controls to be sure it is fixed.
    If you wish, you can disconnect the vacuum harness under the dash for easier working room. It just pulls out.

    I can post a picture if needed.

    Gerry
  • thetazthetaz Member Posts: 8
    I would love to see a picture of this fix. I have spent over $1200 and it is not fixed yet.
  • snorkelbobbysnorkelbobby Member Posts: 19
    These are usually a case of a vacuum leak where the vacuum harness is not tight to the back of the control head. Two 10" twist ties holding the vacuum harness tight to the control head should fix it. You can replace the vacuum harness for $20, but I would still install the twist ties. The would feed through the back if the unit.

    pull the long trim piece covering the control head straight out. Remove the 4 screws on the control head. Remove the 2 torx screws holding the back cover on, so you can feed the tie straps around it.
    Vacuum harness is F5VY-19C827-A, 2 feet long.

    If that doesn't fix it, then look up Gino on ebay, He fixes the internal vacuum leaks in the control head solenoids on an exchange basis.

    Gerry
  • snorkelbobbysnorkelbobby Member Posts: 19
    I will post this week.
  • nebula7nebula7 Member Posts: 3
    I have this problem too except it found out it was my EATC unit because it worked sometimes and sometimes not, then one day it pissed me off so much that I just took it out one day and beat the crap out of it and I heard a loud electric SNAP and it's worked perfect for a week so far, I still plan to replace it with a lifetime warranty though.
  • snorkelbobbysnorkelbobby Member Posts: 19
    How do you post a picture/image on this site?
  • snorkelbobbysnorkelbobby Member Posts: 19
    I have 2 good pictures of the fix. How do I psot them on this site?

    Gerry
  • nebula7nebula7 Member Posts: 3
    Yes I thought it was a vacuum problem at first, but turned out to be an EATC module failure, The unit from 1997 I think? to 2009 is complete crap and can't handle the vacuum pressure and fails. I took mine out and beat the crap out of it while it was all still hooked up and I heard a kind of a loud snap like it was electrical or something and it's worked for 2 weeks now perfectly no matter what I do.

    No you don't have to remove the WHOLE dash, just the wood trim piece, I can post pictures sometime of what I did. All you really have to do is pop off the wood piece (starting from the far right) and then it comes off.... After that the screws are visible in which to remove the EATC module, easy as pie, Also a lot of places on ebay give you a new one for $200 with a lifetime warranty. Very good deal if you ask me considering the Dealership wanted $700.00. I will probably do that myself once I return from the Marines.
  • snorkelbobbysnorkelbobby Member Posts: 19
    The blower motor speed controller. It provides 20 speeds for the EATC vs 4 for manual system.
  • ten29mten29m Member Posts: 1
    I have a control head for a 04 GRAND MARQUIS that needs to be rebuilt. Can you please list the Name and address of the guy who rebuilds them in LA. I also live in LA and would like to talk to him. Thanks.
  • thetazthetaz Member Posts: 8
    Contact this guy. He gets $175 for the unit exchange and it worked for me. ginolena@sbcglobal.net
  • soldasissoldasis Member Posts: 1
    My EATC in my 99 Marquis worked fine for one day after buying it then fuse #5 blew. which i pinpointed to my EATC. It keeps blowing fuses if i hook up the display wire (gray connector) to the back of the unit my display and all work but when i hook up the black connector the fuse will blow? Anyone tell me why? And what i could do?
  • snorkelbobbysnorkelbobby Member Posts: 19
    Before you replace it, try pushing the vaccum harness against the control head for a better fit at the 5 vacuum hoses. This vacuum harness relaxes over the years and you develop a vacuum leak. 2 tie straps from the hardware store will hold it tight. I posted a picture of the fix here somewhere. The vacuum harness is $25 but still needs the tie straps.
  • snorkelbobbysnorkelbobby Member Posts: 19
    could be the blower motor speed controller. has like 20 speeds that vary the voltage to the blower motor.
  • snorkelbobbysnorkelbobby Member Posts: 19
    get 2 tie straps to hold the vacuum harness (5 hoses) tight to the back of the control head. I have pics if needed.
  • brookfieldrichbrookfieldrich Member Posts: 5
    I have a 2003 Grand Marquis and the blower motor is not working at all. All controlls (heat/vent/ac) were blowing out the defroster vent for approximately one year. Recentlly everything just stopped working. I wasn't getting any wierd noises or other disruptions prior to it going out. Any suggestions on where to start. I'm unemployed and can't take it to a mechanic right now. Can do the work myself with some guidance. i just don't know my way around this car at all. Thanks.
  • jrm76jrm76 Member Posts: 1
    Did you ever find a fix for this? I am having the same problem on a 99 LS.
  • brookfieldrichbrookfieldrich Member Posts: 5
    I have not found a fix for this yet. Still hoping someone responds with some advice on how to proceed.
  • loneyloney Member Posts: 1
    Hi....i need your help. my pop has a 2003 grand marq. ..has the same issue -air is stuck on defrost. can you send me a pic. got your repair info. thanks. mahlonvette@aol.com
  • mrstankiemrstankie Member Posts: 1
    Mr.snorkelbobby, I have the same problem with my 2003 Merc. GM. Is there someway you would provide me with the pics you are referring to. I have very little experience working on things so with your pics I will try to repair my AC problem. Your pics would increase my confidence level on this project. Thank you! Donald
  • espirireespirire Member Posts: 1
    I'd like to help those who have problem on their AC being stuck on defrost. A very cheap solution was to replace the o-rings. you can find it here...

    http://www.mercurymarauder.net/forums/showthread.php?t=36922&highlight=repaired+- eatc+today&page=12

    Ruel
  • mnitalianmnitalian Member Posts: 1
    My mother has a 2002 Mercury Grand Marquis LS. Not only is the clutch for the compressor and the compressor it's self going out, we lost the screen on the Electronic Automatic Temperature Control. The buttons on the EATC light up, however the screen does not work, thus the unit does not work.
    We checked the fuses, pulled the unit and noticed nothing blown or obviously out of place.
    I did read on this forum about soldering some connections under the hood but I didn't catch where to locate that board.
    I have yet to call around to my local junk yards and garages to just replace the device, I'm hoping someone on here knows of an easy fix.
    Thank you for your time!
  • merlin777merlin777 Member Posts: 1
    I have what appears to be the same problem with my 2002 Crown Vic... Please send pictures of your fix.
    Thank you.
  • catnipslscatnipsls Member Posts: 1
    I would also like to see pix of your fix. Have not been able to locate them on this forum.
  • 2003gm2003gm Member Posts: 1
    I have an 02 GM LS. The fan was working intermittently in the summer. As the weather cooled we turned on the heat and didn't have any. It was blowing cool air out of the vents(no a/c). Now the fan is not working at all. I've read other post and think the fan is probably the fan control module with the bad solder points. I can fix that. My problem now is with the heat. The a/c compressor comes on and off when called for, but no heat comes on no matter how warm the motor gets. Even at freeway speed where you would expect to get at least some warm draft. you only get cool draft. I can hear the dampers working under the dash. Could this be the control unit or could I be lucky and only be a vaccume issue?

    Any help will be appreciated
  • lfalls3048lfalls3048 Member Posts: 1
    please post the pics or send them to me too...i also have a 2006 grand marquis and the dealer said the problem was in the control head....a vacumm leak. they want 800.00 to replace it but the service manager said to purchase a used one from a local yard.
  • shadetree9shadetree9 Member Posts: 6
    I am seeing a lot of need for a used control module and they are not cheap. My '08 GM was changing from ac vents to defrost vents while accelerating. I used some weedeater gas line to get vacuum directly to the vent control and it worked and for almost free however it is a rig job. Black vacuum to Blue vacuum line on the vacuum harness
    Just happened to run across info on a Cold Boot process that fixed the problem and saved $300.00 to $800.00 depending on whether you put in a used one or let the dealer do it.
    To cold boot which reinitializes and calibrates the vacuum actuators just turn off the ignition, unplug the two wiring harnesses for one minute, reconnect the harnesses and turn on the ignition. Then push any button except off on the module. Wait thirty minutes for the process to complete. It will appear that nothing is happening but just wait. It should be done in thirty minutes just try it and see if it works. Hope you get a success too.

    The woodgrain trim above the module is a clip on I took it off with my fingers. Then four skrews that hold the module. Ease it out just enough to work on.

    Take Care
    George okc
  • ron30096ron30096 Member Posts: 2
    Last summer I turned on the a/c and 8000 degree heat came out of the dash, being far from home my easy fix was to clamp off the heater hose to the heater core, this worked great and got me home in a/c comfort. this winter I took the clamp off and was able to have heat but had to turn it off when it got too hot. This year I clamped it off again and I have a/c but only at an idle, accelerate and it goes to warm air. The air blows out the vents and does not change to defrost as in other posts. Anyone have any ideas? Me and my car are old and on a fixed income,so any help would be greatly appreciated. Thanks !!!!!!!!!!!!!!!!!!!!!!!
  • re55re55 Member Posts: 6
    Mine does the same, heater is on all the time. I have been told that it is the blend door actuator motor. I am having my replaced tomorrow. Let you know if that works to fix it. The part is $55.00 at CARQUEST. If your heater blows only through the defroster, it is the A/C Climate Control EATC . I also had this part repaced with a used one from awrecked car,and it fix the problem of only defroster, but it only lasted 1 year and then it went out again. From what I have read is that the EATC last 60,ooo to 85,000 miles mine went out at 70,000 miles. The one I replaced it with was a little newer car so I would say that is why it lasted a year. New they are $650.00. So we took the vacuum hoses and hooked them up to a type of splitter, and I now manually switch from defrost to vent by moving the hoses from one outlet to the other.
  • ginolenaginolena Member Posts: 2
    edited April 2011
    I was reading this tread and seems like you guys need some help..

    Some of you have different problems and each need personal solution.

    I'm repair shop owner with more than 10 year expirience, and have a degree in electric engineering. Crown Vics and Grand Marquis are our field for more than 12 years.

    I can give you personal answers to your problem and pinpoint exact reason of failure by symptoms. You can contact me using my profile info, or google my name, since Edmunds prohibit posting emails or phone numbers as contact info in the posts and I'm unable to check this board on regular bases.

    So, here are a few tips:

    1. - If you cannot control air speed , stock on low, stock on high, or there is no air at all - than your fan resistor aka fan speed controller is bad! Located on the firewall, engine compartment, just on the right from the heater core. Buy it from dealer, it's about $60 and replace. Do not resaturn contacts on the old one - if it's happened - this resistor was hot and failed! And bad resistor can kill your climate control! (of course, you have to check fuses and fan motor itself to eliminate possibilities first)

    2. - If you cannot switch from hot to cold air or from cold to hot - than your blend door motor acuator is bad! Located on the top of the blend door itself, in the dashboard behind the glove box. (have to pullout complete dashboard on the pass side to replace). Buy it from dealer, it is about $55 and replace. Do not buy used ones, it's not worse it. Also possible - blend door has mechanical issues and stock - inner temp sensor failed or air pass to sensor clogged with dust - climate control failed. But door actuator is most common.

    2. If your vehicle is 95-97 and your a/c compressor does not engaged - your Climate Control need to be repaired/replaced.

    3. - And finally, what people usually complain about:
    - If air blow thru vents and than switch to defrost while you accelerate
    - If air stock on floor or defrost only
    Than your Climate Control (EATC module) is BAD.
    Vacuum leak inside the control. All Ford-Mercury-Lincoln family cars with Electronic Automatic Temperature Control have this issue! From 95 to 2009 - every control has manufacture flow inside. Control need to be rebuild and updated completely to prevent future failure. No "mickie mouse job" as replacing o-rings or switching vacuum pipe is a permanent solution. Most of the time it make your control falling beyond the rebuild point.
    Years ago I figured out what is exactly wrong there and found the way to fix a problem once and forever. Apprx 3,000 controls been rebuilt allready, with less than 1% warranty returns for the last 7 years. So we proudly supply lifetime warranty on our rebuilds. We can rebuild your, if it's still rebuildable or Exchange to one from our stock, that allready rebuilt, tested and ready to go.



    We also rebuild and exchange Light Control Modules (LCM) for Crown Victorias, Grand Marquis and Marauders - all years from 94 to 2009
    As well as ABS Control Modules (small computer on top of the ABS pump) for the above vehicles.
  • dlw1053dlw1053 Member Posts: 1
    2001 Grand Marquis with Auto Climate Control. AC works fine. No heat and defrost blows only cold. Also fan is on full when system is on and cannot be turned down or off. Any help greatly appreciated.
  • tgwilsontgwilson Member Posts: 2
    I have seen lots of messages about this subject. I just wanted to know if I can but a rebuilt one from some where.
  • cheapwayoutcheapwayout Member Posts: 1
    I,m working on a 1997 Grand Marquis and the a/c clutch doesn't engage. I checked all my switches , and they check out good. I put twelve volts to the compressor and it works.(clutch), but I don't have 12 volts at the cotacts of the comp cutout relay. I do have 12 volts at the coil of the relay,and it works. I think its the E.A.T.C.M but I'm not sure. What can you advise me? or where can I exchange mine with one of your rebuild.
  • bobe21bobe21 Member Posts: 1
    I own 1999 Mercury Grand Marquis while traveling down the highway our Climate Control Unit totally quit working, you can get anything, at about the same time I noticed that I did not have and turn signals. We have checked all of the different fuses, all tested good. My Wife told me that the front the the climate control unit on the dash seemed to be warmer then the rest of the dash. Sue need some help.... I also own a 1997 Mercury Grand Marquis, can I exchange the units to see if the system will work or do you think it could short out this unit. Help Please.
  • jackinalabamajackinalabama Member Posts: 1
    Im new to edmunds site, my name is jack. i researched problem with EATC AC controll unit that would only blow air from the defrost vents and the remedy was to replace four .007 silicon "O" rings located on the accuator inside the controll module. Pull trim off by hand starting as passenger door. 4 screw hold unit in place. disconect 2 electric connections and vaccum lines then take unit to table and remove two star screws on back, lift up. That unit contains the four silinoids bend tabs at end and pull out accuator shaft, carefully not to lose the spring. Put new seals on. Reassemble. I just fixed mine for $8.00. The silicon "O" rings seem to work the best according to research.
  • dbj47dbj47 Member Posts: 3
    douglasjohnson@bresnan.net
    How do I contact you to get a EATC Module. I have a 2006 Grand Marquis with 35,000 miles and it just started switching the air to the defroster vent as I accelerate or go up a hill.

    dbj
  • dbj47dbj47 Member Posts: 3
    douglasjohnson@bresnan.net
    Where are the two wiring harnesses located that have to be disconnected for a cold boot.

    thank you,
    dbj
  • dbj47dbj47 Member Posts: 3
    Could I get a copy of the the pictures to hold vacuum harness up.

    Thank you
    dbj
  • ginolenaginolena Member Posts: 2
    contact me at sbcglobal.net
  • chaindrivechaindrive Member Posts: 4
    I have an 07 grand marquis, same problem, but now it is blowing hot too. Checked the door actuator and it has small amount of vacum. I have just over 90,000 miles when door stopped moving . Now 102,000 and its blowing heat to on 90degree days. I found a dealer on ebay who rebuilds your eatc for 79.00
    and free shipping. Money is tight right now, was wondering if Bigmercs fix would work for me too.
  • ron30096ron30096 Member Posts: 2
    Hi joveto, simple fix,but only temp, i used a pair of needle nosed vise grips and clamped off the heater hose going into the heater core, no more 9000 degree heat into the car,I plan to put an inline shutoff valve in the hose in order to not have to rip the dash out to fix, my 98 has 200,000 miles on it and runs great
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