Last post on Nov 16, 2013 at 11:56 AM
You are in the Ford Crown Victoria/Mercury Grand Marquis
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Ford Crown Victoria, Mercury Grand Marquis, Heating / Cooling, Sedan
#103 of 192 Climate controls issues on Ford family vehicles
Apr 10, 2011 (11:09 am)
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.
#104 of 192 AC Fine...No heat
May 14, 2011 (5:46 pm)
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.
#105 of 192 EATC Module for 2006 Merc grand marquis
May 30, 2011 (9:39 am)
I have seen lots of messages about this subject. I just wanted to know if I can but a rebuilt one from some where.
#106 of 192 Re: Climate controls issues on Ford family vehicles [ginolena]
Jun 04, 2011 (5:22 pm)
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.
#107 of 192 1999 Merc Grand Marquis Climate Control
Jun 08, 2011 (5:32 pm)
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.
#108 of 192 Re: AC PROBLEM [lfalls3048]
Jun 09, 2011 (10:06 am)
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.
#109 of 192 Re: Climate controls issues on Ford family vehicles [ginolena]
Jul 06, 2011 (3:52 pm)
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.
#110 of 192 Re: '08 Grand Marquis ac control module, ac comming out of defrost [shadetree9]
Jul 06, 2011 (3:56 pm)
Where are the two wiring harnesses located that have to be disconnected for a cold boot.
#111 of 192 Re: AC PROBLEM [snorkelbobby]
Jul 07, 2011 (8:27 am)
Could I get a copy of the the pictures to hold vacuum harness up.
#112 of 192 Re: Climate controls issues on Ford family vehicles [cheapwayout]
Jul 10, 2011 (9:25 pm)
contact me at sbcglobal.net