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Ford Crown Victoria/Mercury Grand Marquis Climate Control

37 messages,  Last post on Nov 07, 2009 at 10:20 PM

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What is this discussion about? Ford Crown Victoria, Mercury Grand Marquis, Heating / Cooling, Sedan

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#12 of 37 2001 EATC Board by dillansdaddy Apr 01, 2007 (1:01 pm)
I read that you can check your Connectors and possibly Solder to fix the Blower problem. Where might I find the Heater/AC Box so I can access it and see if I have the same connector problem?
#13 of 37 Re: Fan has mind of its own [vmon] by cabinetpro Apr 14, 2007 (10:44 am)
Replying to: vmon (Jun 26, 2006 8:03 am) I had this problem on my Marauder. Try unplugging the vacuum plugs at the passenger side behind the oil and volt meter. then take a jumper vacuum hose (starting with stub that has vacuum in it, with the car running) and plug it into different stubs and see if the blendoors change, (the air will come out of the defrost or vents). If it does, then the climate controller is bad. New at the dealer about $500.00. used on Ebay about $50.00.   This fixed my air problem.   Good luck. Brian Replies to this message: hag100 (Jul 12, 2009 11:31 am)
#14 of 37 2003 Mercury Grand Marquis LSE Heater & A/C motor NOT Blowing by ascorbate May 25, 2007 (10:35 am)
I have read thru another post in this forum about heater and a/c blower motors that stopped working suddenly.   I have a similar problem with a 2003 Mercury Grand Marquis LSE with climate control (Electronic Automatic Temperature Control or EATC for short). I have checked the obvious including the inside passenger compartment fuses plus the power distribution box underneath the front hood with particular attention to both the blower motor relay and blower motor fuses. I even swapped them out with other working relay and fuses in the power distribution box. I then measured the voltage being applied to the blower motor itself under the hood. It read anywhere from 1 to 6 DC volts or so. I have a similar blower motor layout in a well maintained 1997 Ford Crown Victoria (without EATC) and that voltage reading was 13-14 volts whether the fan speed control was set on low or high. So I'm suspicious of the lower voltage I measured in my Grand Marquis versus my Crown Vic... why would there be this big difference?   While traveling down the highway yesterday at 50-60 mph with the a/c set to 70 degrees, I could feel cool air coming from the vents in my 2003 Grand Marquis probably because of some of the air being recirculated from the outside to the inside. The faster I went, the more cool air I could feel coming from the vents BUT still the blower motor wasn't working. So the A/C system is working, it just ain't blowing this cool air around the inside of my car!   I read about a EATC module self test today at: http://www.p71interceptor.com/eatcswap/selftest.html which I performed with NO Diagnostic Trouble Codes (DTC) indicated. I then disassembled the fan speed control switch, cleaned it with a cotton swab and some rubbing alcohol, reassembled everything but still the same result... the heater and a/c is not blowing any warm or cold air whatsoever.   What else am I overlooking? Replies to this message: ascorbate (May 26, 2007 11:56 am) jsylvester (Jun 24, 2007 10:56 am)
#15 of 37 Re: 2003 Mercury Grand Marquis LSE Heater & A/C motor NOT Blowing [ascorbate] by ascorbate May 26, 2007 (11:56 am)
Replying to: ascorbate (May 25, 2007 10:35 am) I read in another forum where some Ford tech at a local dealer was replacing tons of Ford basic part # 19E624 which seems to be known as the blower speed controller. I took a chance and purchased one and replaced mine; it fixed the problem and now the A/C will blow your hat off!   Let me tell you though that this was an absolutely "miserable" module to replace. It is under the hood sandwiched below the two heater hoses and underneath the vapor mangement valve and secured with two 8 mm screws. What should have been a 10 minute job turned into a 2-3 hour miserable job thanks (once again) to the forward-thinking engineers at Ford Motor Company. I don't know what those automotive engineers were smoking but it must have been damn good!   I did read somewhere that if this blower speed controller needed replacement, that something else (like the blower motor itself) may have been the real culprit. Anyone else have any opinions about this? Replies to this message: jsylvester (Jun 24, 2007 10:56 am)
#16 of 37 Air conditioning by zigback Jun 23, 2007 (10:36 am)
I smell gasoline when running the ac. Has anyone else had this problem and what can be done?
#17 of 37 Re: 2003 Mercury Grand Marquis LSE Heater & A/C motor NOT Blowing [ascorbate] by jsylvester Jun 24, 2007 (10:56 am)
Replying to: ascorbate (May 26, 2007 11:56 am) My 2002 LSE did the exact same thing - there is a blower resistor module that goes out - it is located in the climate control plenum on the firewall. It is cooled by any air that moves through there, and apparently it is a result of the "lowest bidder" supplier agreement method.   I paid $150 to get mine fixed by my local Mom and Pop garage. One advantage of the Grand Marquis is everyone knows how to work on it, so don't overpay for a dealer to fix it.   One suggestion is to find the garage your local police uses for repairs - they will know the car inside and out.
#18 of 37 Re: Cheap & Easy Fix for EATC Blower Operation Problem [mr5x5] by boscoal Jun 24, 2007 (5:46 pm)
Replying to: mr5x5 (Mar 21, 2007 12:14 pm) I found the same thing on my controller . I also found a bad diode. Have not repaired it yet just found it due to your comments Thanks Al Malone Replies to this message: fred90 (Mar 20, 2009 1:46 pm)
#19 of 37 Automatic Climate Controle by bigmerc Jul 05, 2007 (5:49 pm)
My EATC(automatic Climate Control) is loosing vacuum. I checked the system, all doors function and do not loose vacuum, supply holds vacuum even post car being off, so storage canister is fine, no leaks in connection. What is left? EATC Symptoms are that air is coming from vent but changes to def/floor or will just come from def/floor. The only reason I can see after checking everything is that the solenoids in the EATC that regulate the vacuum to the different doors are not getting enough current. This in turn allows the opening to the outside air to open when the solenoid is activated and therefore loosing vacuum in that part of the system. Does anybody know how to fix this, short of replacing the EATC and does anybody have an electric schematic of the EATC? Replies to this message: twocassels (Aug 05, 2007 11:17 am) bigmerc (Aug 07, 2007 11:56 am) lilborther (Jul 04, 2009 3:08 pm)
#21 of 37 98 CROWN VIC A/C DRIP LINE by jiggyfli Jul 10, 2007 (12:17 pm)
OKAY I AM NOT THE SMARTEST PERSON IN THE WORLD, BUT EVEN I SHOULD BE ABLE TO FIND THE A/C DRIP LINE. BUT FOR WHATEVER REASON I CAN NOT FIND IT. MY A/C IS NOT DRIPPING AND I CAN HEAR WATER ROLLING AROUND IN MY DASH. I HAVE MY CAR UP ON JACKSTANDS RIGHT NOW BUT I STILL CAN NOT FIND IT. PLEASE HELP...............

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