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How do you replace the heater core in a 1994 Ford Crown Victoria?

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  • 53 Answers

I can tell you right now it is a job. I found a link for you hope this helps. http://www.supermotors.net/registry/6098/29780-2

Posted on Jan 04, 2013

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Posted on Jan 02, 2017

  • 7 Answers

SOURCE: How to take out dash

I agree with 'jthall1', it is a major pain! Undo every bolt and screw visible to the eye. Then you have to find the ones that you can't easily see! (They are near the defroster vents and under the dash and also behind the glovebox.) Now that you have it lose and it still won't come down for you, you have to remove the, i believe its 2, bolts holding you steering column up. At this point you can now pull the dash down and gain access to the heater core, which you will probably have to ***pry*** off the firewall. As previously stated, IT IS A PAIN!!!!!!!!!! PS- Don't forget to take the lines and bolts off the heater core from under the hood!

Posted on Aug 16, 2008

  • 202 Answers

SOURCE: 1999 crown victoria

You don't.
The dash has to come out in order to remove the HVAC box to get to it.

Posted on Apr 29, 2009

harley9701ha
  • 424 Answers

SOURCE: WHAT DO I REMOVE TO REPLACE HEATER CORE IN 1996

The dash has to be removed. The evaperator case has to be pulled forward to get to the clip or nut holding the heater case. It is a big job. If you are not comfortable removing the dash do not try it.

Posted on Dec 02, 2009

c17hydro
  • 2984 Answers

SOURCE: heater core

No, you don't have to pull the whole dash board but you have to pull a few panels....here is the steps on how to get to it and remove and replace it:

  1. Disconnect the negative battery cable.
  2. Drain the cooling system and disconnect the heater hoses from the heater core tubes. Plug the hoses and the heater core tubes to prevent coolant leakage.

CAUTION NEVER open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.


  1. Remove the 3 nuts located below the windshield wiper motor attaching the left end of the plenum to the dash panel. Remove the 1 nut retaining the upper left corner of the evaporator case to the dash panel.

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Plenum removal—1990-98 vehicles

  1. Disconnect the vacuum supply hose(s) from the vacuum source. Push the grommet and vacuum supply hose(s) into the passenger compartment.
  2. Remove the right and left lower instrument panel insulators.
  1. On 1989 vehicles:
  2. Remove the 3 glove compartment hinge screws, disconnect the check arms and remove the glove compartment.
  3. Loosen the right door sill plate and remove the right side cowl trim panel.
  4. Remove the bolt attaching the lower right end of the instrument panel to the side cowl.
  5. Remove the instrument panel pad as follows:
    • Remove the 2 screws attaching the pad to the instrument panel at each defroster opening. Be careful not to drop the screws into the defroster openings.
    • Remove the one screw attaching each outboard end of the pad to the instrument panel.
    • On Crown Victoria, remove one pad attaching screw near the upper right corner of the glove compartment door.
    • Remove the 5 screws attaching the lower edge of the pad to the instrument panel. Pull the instrument panel pad rearward and remove it from the vehicle.
  6. On 1990-98 vehicles:
  7. Remove all instrument panel mounting screws and pull the instrument panel back as far as it will go without disconnecting any wiring harnesses.
  8. Make sure the nuts attaching the instrument panel braces to the dash panel are removed.
  9. Loosen the right door sill plate and remove the right side cowl trim panel.
  10. If equipped with manual air conditioning, disengage the temperature control cable housing from the bracket on top of the plenum. Disconnect the cable from the temperature blend door crank arm.
  11. If equipped with Automatic Temperature Control (ATC), proceed as follows:
  12. On 1989 vehicles, disconnect the temperature control cable from the ATC sensor.
  13. Detach the vacuum harness line connector from the ATC sensor harness and detach the electrical connector from the ATC servo connector.
  14. On 1990-98 vehicles, remove the cross body brace and disconnect the wiring harness from the temperature blend door actuator. Detach the ATC sensor tube from the evaporator case connector.
  15. Detach the vacuum jumper harness at the multiple vacuum connector near the floor air distribution duct.
  16. Disconnect the white vacuum hose from the outside-recirculating door vacuum motor.

572e87e.gif
Floor air distribution duct removal—1990-98 vehicles
  1. Remove the 2 hush panels.
  2. Remove 1 plastic push fastener retaining the floor air distribution duct to the left end of the plenum.
  3. Remove the left screw and loosen the right screw on the rear face of the plenum and remove the floor air distribution duct.
  4. Remove the 2 nuts from the 2 studs along the lower flange of the plenum.

a3c9f99.gif
Heater core removal—1990-98 vehicles

  1. Carefully move the plenum rearward to allow the heater core tubes and the stud at the top of the plenum to clear the holes in the dash panel. Remove the plenum from the vehicle by rotating the top of the plenum forward, down and out from under the instrument panel. Carefully pull the lower edge of the instrument panel rearward, as necessary, while rolling the plenum from behind the instrument panel.
  2. On 1989 vehicles with ATC, remove the ATC servo from the plenum.
  3. Remove the 4 retaining screws from the heater core cover and remove the cover from the plenum assembly.
  4. Pull the heater core and seal assembly from the plenum assembly.
To install:
  1. Carefully install the heater core and seal assembly into the plenum assembly. Visually check to ensure that the core seal is properly positioned. Position the heater core cover and install the 4 retaining screws.
  2. On 1989 vehicles with ATC, install the ATC servo on the plenum.
  3. Route the vacuum supply hose through the dash panel and seat the grommet in the opening.
  4. Position the plenum under the instrument panel with the register duct opening up and the heater core tubes down. Rotate the plenum up behind the instrument panel and position the plenum to the dash panel. Insert the heater core tubes and mounting studs through their respective holes in the dash panel and the evaporator case.
  5. Install the 3 nuts on the studs along the lower flange and one on the upper flange of the plenum. Install the 3 nuts below the windshield wiper motor to attach the left end of the plenum to the dash panel and the one nut to retain the upper left corner of the evaporator case to the dash panel.
  6. Position the floor air distribution duct on the plenum. Install the 2 screws and plastic push fastener. If removed, position the panel door vacuum motor to the mounting bracket and install the 2 attaching screws.
  7. Connect the white vacuum hose to the outside-recirculating door vacuum motor. Attach the vacuum jumper harness to the plenum harness at the multiple vacuum connector near the floor air distribution duct. Install the floor duct.
  8. If equipped with manual air conditioning, connect the temperature control cable housing to the bracket on top of the plenum and connect the temperature control cable to the temperature blend door crank arm. Adjust the temperature cable.
  9. If equipped with ATC, proceed as follows:
    1. On 1989 vehicles, connect the temperature control cable to the ATC sensor and adjust the cable. Route and attach the vacuum harness connector to the ATC sensor and attach the electrical connector to the ATC servo connector. Do not block the sensor aspirator exhaust port with the excess vacuum harness. Install the ATC sensor tube between the sensor and the evaporator connector.
    2. On 1990-98 vehicles, attach the ATC sensor tube to the evaporator case connector. Install the cross body brace and connect the wiring harness to the blend door actuator.
  10. Install the bolt to attach the lower right end of the instrument panel to the side cowl. Install the right side cowl trim panel and tighten the right door sill plate attaching screws.
  11. On 1989 vehicles, install the instrument panel pad and the glove compartment door. On 1990-98 vehicles, push the instrument panel back into position and install all instrument panel mounting screws. Install the right and left lower instrument panel insulators.
  12. Connect the vacuum supply hose(s) to the vacuum source.
  13. Install the right and left lower instrument panel insulators and install the 2 hush panels.
  14. Unplug the heater core tubes and the heater hoses and connect the heater hoses to the heater core tubes. Fill the cooling system.
  15. Connect the negative battery cable and check the system for proper operation.

Posted on Feb 15, 2010

  • 180 Answers

SOURCE: Changing the heater core on a 1998 Crown Victoria

this job is not for the faint of heart! the dash board must be removed! if you would like to proceed email me and ill guide u the rest of the way

Posted on May 11, 2010

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this job is not for the faint of heart! the dash board must be removed! if you would like to proceed email me and ill guide u the rest of the way

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Does complete panel need to be removed to get to heater core on 1985 ford crown victoria


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1 Answer

WHAT DO I REMOVE TO REPLACE HEATER CORE IN 1996 CROWN VICTORIA?


The dash has to be removed. The evaperator case has to be pulled forward to get to the clip or nut holding the heater case. It is a big job. If you are not comfortable removing the dash do not try it.

Dec 02, 2009 | 1994 Ford Crown Victoria

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Where is the heater core located at in a 1994 Ford Crown Vic and how do you get to it?


Underneath the dash. There is a lot of disassembly required. This is not a do-it-yourself project.

Oct 18, 2009 | 1994 Ford Crown Victoria

1 Answer

I have a pretty bad water leak behind the engine in my '94 Crown Victoria. Could it be intake manifold, freeze plug, or heater core?


Well, yes, the leak that you describe could from any of those areas, but not likely the heater core. Heater core leaks totally fog out windshield...

More likely causes are cracked coolant hoses, take a mirror and look around. If you do not find the leak, you need to add pressure, it should show up...

Oct 11, 2009 | 1994 Ford Crown Victoria

2 Answers

How to take out dash on 1997 crown victoria to replace heater core


I agree with 'jthall1', it is a major pain! Undo every bolt and screw visible to the eye. Then you have to find the ones that you can't easily see! (They are near the defroster vents and under the dash and also behind the glovebox.) Now that you have it lose and it still won't come down for you, you have to remove the, i believe its 2, bolts holding you steering column up. At this point you can now pull the dash down and gain access to the heater core, which you will probably have to ***pry*** off the firewall. As previously stated, IT IS A PAIN!!!!!!!!!! PS- Don't forget to take the lines and bolts off the heater core from under the hood!

Aug 13, 2008 | 1994 Ford Crown Victoria

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