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2000 Grand Marquis - A/C Issues

11 messages,  Last post on Jul 30, 2012 at 2:02 PM

You are in the Ford Crown Victoria/Mercury Grand Marquis Forum.

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

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#1 of 11 2000 Grand Marquis - A/C Issues by jasoncyrfl

Jun 24, 2008 (5:44 am)

Purchased a 2000 Grand Marquis GS with 55,000 miles about 2 months ago...Replaced accumlator, hoses, evaporator and condensor due to rust/pin holes...A/C still does not really blow out that cold (in Florida, I need cold)...Any recommendations? Should I try the Interdynamics R134A (some ultra synthetic stuff)? Thanks in advance for any advice/solutions...

#2 of 11 1999 grand marquis LS A/C issues by gina26

Jun 06, 2010 (7:27 am)

My Grand Marquis runs extremely well, never any problems until the last few mo. w/ my a/c, it works but every time I start my car w/ a/c on it squeals so bad, it will stop after I am driving but when I slow down or stop the squealing starts again, My boyfriend had thought that it was the belt but that didnot work and then replaced the idler pulley and no luck there. Any idea what could be the problem?

#3 of 11 2000 MGM does not run AC self test by drtripower

Jul 04, 2010 (6:11 pm)

Two months ago my 2000 MGM was blowing hot air. Ran the self test came back with a solar radiation code. After running the test the AC blew cold air for two months. Now its hot again and the self test will not run. Any ideas?
 
thanks in advance,
Lou

#4 of 11 2007 Grand Marquis AC through Defroster by conroejg

Jul 22, 2010 (8:53 am)

Yesterday 7/21/10 replaced the AC/Heater dash controller for $800 parts and labor with 59000 miles. With all the problems Ford has had with this device over the years, they could not engineer a unit that does not crap out unitl 150000 - 200000 miles? 2 car family - 1 American 1 Nissan going to 2 foreign when the Merc dies.

#5 of 11 Re: 1999 grand marquis LS A/C issues [gina26] by snorkelbobby

Jul 26, 2010 (12:36 pm)

Replying to: gina26 (Jun 06, 2010 7:27 am)
replace belt tensioner

#6 of 11 Not the control head by snorkelbobby

Jul 26, 2010 (12:39 pm)

It is not likely the control head that is the root cause. It is likely the vacuum harness attached to the back of the control head is loose and needs tie straps to keep it tight to the control head so you don't get a vacuum leak. Vacuum leaks result in system diverting to defrost mode by law.

#7 of 11 2000 MGM Wiper Blade Problem by drtripower

Dec 12, 2010 (2:41 pm)

My 2000 MGM has a problem where the wiper arms will lift away from the windshield the faster I go leaving water on the windshield. As I slow down the wipers will make contact cleaning the water away from the windshield. I replaced the arms, but it still does the same thing.
Any ideas?

#8 of 11 Re: 2000 MGM Wiper Blade Problem [drtripower] by euphonium

Dec 13, 2010 (11:05 am)

Replying to: drtripower (Dec 12, 2010 2:41 pm)
Try attaching a 4 oz lead fishing weight to the middle of each arm. Duct tape may work or tie the lead weight with fishing line. This is not recommended as a fix, but to determine if or how badly you need new arms that are stronger such as found on the Lincoln Town Car.

#9 of 11 Re: 2007 Grand Marquis AC through Defroster [conroejg] by shadetree9

Apr 04, 2011 (7:04 pm)

Replying to: conroejg (Jul 22, 2010 8:53 am)
I did this thing called a cold boot on mine with the same problem. It worked. You turn off the ignition , unplug the two wiring harnesses on the module for one minute then plug them back in and turn on the ignition, press any button but the off and wait for it to reinitialize and calibrate about 30 minutes. It will not appear that anything is happening but start the car and try it now. I found it on a repair database at the library.
 
                                        Georgie

#10 of 11 A/C on 99 GM by moorerbrian1

Apr 08, 2011 (10:40 am)

i have been working on ac on 99 gm and w/ vaccum lines off i let the vaccum pulled go and now i have hooked all back up and nothing no fan ,defrost, floor, etc... help

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