Question about 2004 Mercury Grand Marquis

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I have 2004 Mercury Grand Marquis. Heater is not working.but air-conditioner works okay. Fuse problem or controler?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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ginko
  • 19396 Answers

SOURCE: 2003 mercury grand marquis LS

The blend door is stuck in cold position. That usually happens because the blend door actuator has failed.

You will need to test and replace the blend door actuator.

To replace the actuator you will need to take apart the dash and remove completely the instrument panel,d isconnect the connector, remove the four screws, remove the temperature blend door actuator and replace it.

The replacement is not a job for beginners, since you have to take apart the dash to access the actuator.

Regards.


Posted on Nov 18, 2009

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simard2
  • 124 Answers

SOURCE: location of blower motor switch resistor on 2004 Grand Marquis

Go to www.fastsupport.com
Enter your name
Enter Support Key 298-118-364

I will be able to chat with you for free and we can solve this very quickly.

Posted on Feb 06, 2009

ancdlm
  • 58 Answers

SOURCE: Check Air Suspension for 2000 Mercury Grand Marquis

It sounds to me like your compressor got killed. What probably happened is that the airbag got a hole or tiny crack in it so the compressor has to work extra hard because it is like blowing up a balloon with a hole in it. Therefor the airbag killed the compressor. I would recommend going to strutmasters.com and taking a look at our conversion kits. these convert you from the airbag to a powder coated American made steel coil spring that is guaranteed to last the life of the car. I added the link below so you can check it out.
http://www.strutmasters.com/mercury-suspension-parts-s/25.htm

I hope I was of some help
Good Luck!!!

Posted on May 06, 2009

olds97_lss
  • 1 Answer

SOURCE: Mercury grand marquis 1997 temperature control

I'm not sure if yours is identical to mine since yours is second gen and mine is third gen, but with mine (1998 MGM), the heat was stuck on all the time. Full heat would practically cook your feet and you couldn't shut it off.

It was a servo/servo arm that controls the hot/cold mix door. The part was $15. The labor was $700. They had to take the entire dash out of the car to get at the part. Required two more visits due to a missed electrical connection to a daylight sensor and a vacuum issue that made the car stall when put into reverse.

My car had 150K on it at the time. Has 165K on it now. Still runs great and looks great. It's now my wife's auto and I drive a 2006 MGM.

Posted on May 13, 2009

  • 1 Answer

SOURCE: Can someone post a fuse diagram for 1991 mercury grand marquis ?

they don't have diagram that i've seen, my roommate has this car and on page 172 of owners manual it gives the number of what fuse does what,, .. which corresponds to the number on the lid of your fuse panel

Posted on May 20, 2009

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1 Answer

I need a diagram for fuse box for 2000 Mercury Grand Marquis. The air conditioner, heater and interior lights don't work


You can get free diagrams at www.bbbind.com/ . home page click on technical information ,the click on tsb's an free wiring diagrams . On the next page go to the bottom an click i agree . Next page click wiring diagrams then enter your vehicle info . year ,make , mode ,engine size. under system click electric distribution . Subsystem fuse panel . Good luck .

Dec 16, 2015 | 2000 Mercury Grand Marquis

2 Answers

My air condition only blows out cold air not hot


Turn your air conditioner OFF and turn your heater ON. Air conditioners were designed to blow out one temperature of air... COLD.

Nov 13, 2014 | 2004 Mercury Grand Marquis

1 Answer

Air conditioner blows warm air on a 2004 mercury marquis


The air conditioning is a system

It like all systems, has to be properly
diagnosed to find a problem,that was
not done or your wouldn't be here or have
an issue, still

We can not guess for you

You pay a professional & now
want to have folks speculate,not
actually work on solving the a/c issue,
so you can use it!!

Jul 19, 2014 | 2004 Mercury Grand Marquis

1 Answer

AC works but heater blows cold


Then the air diverter door inside the heater housing isn't working. Look for a vacuum leak or a bad cable connection.

Jan 24, 2014 | 2005 Mercury Grand Marquis

1 Answer

1998 mercury grand marquis heater doesnt work only cold air comes out the air cond works fine the enginecoolant is new, the engine doesnt overheat.


Either your heater control valve is not properly operating or your heater core is clogged. Locate the heater control valve under the hood, should be close to firewall on heater hose, have someone adjust temperature from hot to cold and see if you can see the heater control valve operating if so replace the heater core, if its not doing anything replace it(heater control valve).

Feb 19, 2011 | 1998 Mercury Grand Marquis

1 Answer

When the ac is on my 2004 mercury, no air comes through the vent. what is wrong ?


It sounds like the blower motor is out or has lost power. First, check the fuse. If that's okay, check the speed controller. The blower motor resistor pack/fan speed controller is in the engine compartment near the receiver drier at the passenger side rear of the engine compartment.

Jun 23, 2010 | 2000 Mercury Grand Marquis

1 Answer

The vent function no longer works, i.e. won't blow


manual or electronic heater/A/C controls?

Could be loose vacuum harness on back of control head. Need to put 10" tie straps on to hold it tight to control head.

May 09, 2010 | 2004 Mercury Grand Marquis

1 Answer

2004 Grand Marquis picked the wrong day for the air conditioner to quit working...it's 94 degrees. The fuse is fine. Oddly....it seemed to have gone out at the exact second that I checked the outside...


A blower control switch for the digital A/C. Mine went out almost the same way, driving along, checked outside temp. and then it started getting warm. No blower, no defroster, not even a trickle of air from the vents.
This part is behind the motor on the ductwork. It is inconveniently behind the heater hose on the engine. It takes 2 screws, about 9mm, and has 1 electric plug.
It is about the size of a pack of cigarettes with 90% in the vent. If you can plug in the new part to the harness you can instantly tell if it is the problem, because the A/C will work. Then remove heater hose and lose some coolant, switch part.
Oddly enough there is a diagnostic in the dash display, but it did not idenify this part.

Jul 17, 2009 | 2004 Mercury Grand Marquis

1 Answer

Heater wont come on


Your EATC control module is bad. 100% all Grand Marquis and Crown Victorias with electronic ac controls.
I rebuild them with lifetime warranty.
Email to ginolena@sbcglobal.net if interested.

Jan 23, 2009 | 2003 Mercury Grand Marquis

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