Question about Ford Crown Victoria

4 Answers

I have a 1995 Ford Crown Victoria LX with a digital heat and A/C control system. The A/C works fine, but it will not blow heat, it just blows cold air. What is causing the heat to not turn on?

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  • DAVID ALLEN Jan 31, 2010

    I checked both of the heater core hoses and they are hot.

  • DAVID ALLEN Jan 31, 2010

    Would the thermostat affect the heat if both heater core hoses are hot?

  • DAVID ALLEN Jan 31, 2010

    I have a 1995 Ford Crown Victoria LX with a digital heat and A/C control system. The A/C works fine, but it will not blow heat, it just blows cold air. Both heater core hoses are hot. What is causing the heat to not turn on?

  • DAVID ALLEN Jan 31, 2010

    The upper radiator hose is hot and the guage is in the middle on the dash. When I adjust the vents from the floor to the dash, or to the defrost(windshield), you can hear the door open/close. When I looked at the back of the digital control unit there are a total of 5 vacuum hoses(blue, red, black, peach, yellow). It appears there is anoth hook up for a vacuum hose, but I do not see any other hoses.

  • DAVID ALLEN Jan 31, 2010

    Where is the bleeder valve?

  • DAVID ALLEN Jan 31, 2010

    How do you access or get to the heater door actuator?

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4 Answers

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If the car does not have a factory fitted ac then the heater core has been blocked. Except you are sure about the ac then you will be able to notefor sure its malfunction.

Let an ac expert take a look at it.

Cheers.

Posted on Jan 31, 2010

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  • Master
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The heater core is in a box beside the a/c evaporater core. There is two separate doors that open and close when you select the mode setting. If you have a/c that means that actuator door motor is working. The heater side autuator motor door is not

Posted on Jan 31, 2010

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First thing to look at is if you are low on coolant. Open up your hood and then take off you radiator cap see if it is full. Next, take the cap off your coolant reservoir tank and see if that is low. Next, replace the thermostat if you have not done so, a bad thermostat has a tendency to stick open. After you check and replace these things and the air is still cold then you may have an air lock. In that case, look for a bleeder valve to release the air from your coolant system.

Posted on Jan 31, 2010

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  • Master
  • 10,515 Answers

Hi,

First thing is to check the coolant level and make sure it is filled to the proper level. Replace the thermostat this would be the most likely cause. Check for proper flow through the heater core make sure it is not plugged and feel the heater hoses make sure they feel hot. If all of that is okay check the blend door operation sometimes the blend doors break.

Let me know, if needed further assistance.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Posted on Jan 31, 2010

  • 1 more comment 
  • taran_2005
    taran_2005 Jan 31, 2010

    Thanks for your response!!

    One way to check
    the thermostat is to start the engine and feel the upper radiator hose
    (or use an infrared non contact thermometer to read its temperature).
    The hose should not feel uncomfortably hot until the engine has
    warmed-up and the thermostat opens. If the hose does not get hot, it
    means the thermostat is not opening.



    Another way to test the thermostat is
    to remove it and dip it into a pan of boiling water (it should open).
    The exact opening temperature can be checked by using a thermometer.

    If Thermostat is Good, the only other thing i could suggest is to check the blend door operation.

    Let me know, if needed further assistance.

    Hope i helped you.

    Thanks
    for using ' Fixya ' and have a nice day!!


  • taran_2005
    taran_2005 Jan 31, 2010

    Thanks for your response!!

    Also if the core is okay, the heater mode doors could be not opening to let the heat into the car. You can check this by setting in the passenger seat and running the temp control lever back and forth from hot to cold and listen under the glove box to see if you hear the door open and close. If not you could have an unhooked or broken control cable, a problem with the control panel or in the mode door itself.


    Let me know, if needed further assistance.

    Hope i helped you.

    Thanks for using ' Fixya ' and have a nice day!!


  • taran_2005
    taran_2005 Jan 31, 2010

    Thanks for your response!!

    Generic Procedure on Victoria :-

    REMOVAL





    Remove heater outlet floor duct.

    Remove instrument panel.

    Disconnect the heater water hoses from the heater core tubes. Plug the
    ends of the heater water hoses to prevent coolant loss.

    Plug heater core tubes securely to prevent coolant leakage from heater
    core.

    Remove one nut retaining the upper LH corner of the A/C evaporator core
    housing to the dash panel.

    Disconnect two vacuum supply hoses from vacuum source. Push grommet and
    vacuum supply hose into passenger compartment.

    Disconnect wiring harness from A/C electronic blend door actuator.

    Disconnect the white vacuum hose from the heater and A/C air inlet duct
    door vacuum control motor.

    Remove nuts from the studs along the lower flange of the heater air
    plenum chamber.

    Disconnect connectors to A/C electronic blend door actuator and
    electronic module on side of heater air plenum chamber.

    Remove heater air plenum chamber by pulling rearward.



    after removing air plenum chamber remove bolts for heater core cover

    and remove and replace heater core-do yourself a favor and get a factory
    core then fill with 50/50 mixture of distilled water and antifreeze and
    if their is a ground wire or strap connected to core be sure and
    reconnect it.





    INSTALLATION

    Route the vacuum supply hose through the dash panel and seat the grommet
    in the opening.

    Position the heater air plenum chamber under the instrument panel with
    the A/C register duct opening up and the heater core tubes down. Connect
    wire harness connector to A/C electronic blend door actuator and
    electronic module on side of heater air plenum chamber.

    Rotate the heater air plenum chamber up behind the instrument panel and
    position the heater air plenum chamber to the dash panel. Insert the
    heater core tubes and mounting studs through their respective holes in
    the dash panel and the A/C evaporator core housing.

    Install three nuts on the studs along the lower flange and one on the
    upper flange of the heater air plenum chamber.

    Install three nuts below the windshield wiper motor to retain the LH end
    of the heater air plenum chamber to the dash panel.

    Install one nut to retain the upper LH corner of the A/C evaporator core
    housing to the dash panel.

    Connect the white vacuum hose to the heater and A/C air inlet duct door
    vacuum control motor.

    Connect the vacuum jumper harness to the plenum harness at the multiple
    vacuum connector near the heater outlet floor duct. Install heater
    outlet floor duct.

    Connect the sensor tube to the evaporator case connector on
    EATC-equipped vehicles.

    Connect vacuum supply hose to vacuum supply.

    Unplug the heater core tubes and connect the heater water hoses to the
    heater core tubes.

    Fill the cooling system with coolant to replace coolant lost during
    removal of the heater air plenum chamber.

    Install heater outlet floor duct. See: Air Duct\Service and Repair\Floor
    Duct

    Install instrument panel.

    Let me know, if needed further assistance.

    Hope i helped you.

    Thanks
    for using ' Fixya ' and have a nice day!!


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