Question about 1998 Ford Explorer

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Blend Door on 98 Ford Explorer

Replaced the heater core and now only blows luke warm, what is the possiblility the blend door got stuck when putting back together? How do I find this?

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  • engine1385 Jan 16, 2009

    Where is the blend door in the dash? Middle? Glove box? what am I looking for?

  • yadayada
    yadayada May 11, 2010

    U will need to pull the dash off and check the blend for sticking, if it is ok replace the blend door actuator motor.

  • yadayada
    yadayada May 25, 2013

    Did you bled the air out of the cooling system?

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The blend door is roughly in the middle of air distribution Plenum assembly between the heater core and the AC evap core, it either directs air through the heater core or the AC evap core or mixes air from both.

Posted on Jan 16, 2009

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3 Answers

I only have luke warm air coming out my ford expedition (2002) does NOT overheat ! i had it flushed out and new anti freeze put in . still kuke warm air


When you said you had it flushed out, were you talking about the radiator or the heater core. The heater core is a miniature radiator. It can get gummed up just like the big one. You will probably have to remove the heater core and have it rodded out by a radiator shop. If you have done that already then there is a problem with the regulator for the heater. Usually it is a simple valve type open and close system to allow more or less hot water into the heater core.

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1998 Jimmy with electrical controls for temperature. Replaced Themostat, Flushed heater core, replaced damaged vacuum lines. Vehicle produces heat to heater core but only luke warm interior temp. Rotated...


Suggestion: see if the blend door opens or closes completely to allow all air through the heater core. To see the blend door moving, remove the panel that says "Cut here for service" under the hood along the firewall. I have a 99 Bravada where the blend door keeps moving back and forth constantly. Changed the blend door actuator but still keeps moving. The air inside is only warm since the door keeps allowing bypassed air through.

Jan 04, 2011 | 1998 GMC Jimmy

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2000 FORD Expedition both heater hoses get warm. gets heat at first then turns cold front and back. I flushed the heater core and didnt get any gunk out. Is this the heatercore or is this the blend door


if the heater hoses are both hot its a blend door actuator, and possably the blend door its self, the way to make sure is to feel around under the dash . feel the black hvac box and if its feels warm then the heater core is good, you will have to remove the dash to replaced the bland door actuator and blend door ,i reccomend you replace both beacause its alot of work to remove the dash so make sure both components are replaced while you are in there

Dec 18, 2010 | 2000 Ford Expedition

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2001 FORD EXPEDITION XLT 4.6L V8 BLOWING MILD WARM BUT NOT WARMING THOROUGHLY. HAVE FLUSHED COOLING SYSTEM THREE TIMES, AND CHANGED THERMOSTAT. HAVE ALSO REMOVED DASH AND REPLACED "BLEND DOOR" AND BLEND...


You hot air comes from the water circulated through the heater core. It is like a miniture radiator with water flowing thru it constantly. So by opening the "Blend Door" you are permitting so much of this hot air to pass thru.

Seems like for some reason your heater core is plugged up. Just like a radiator can be. So water may be passing through your heater core but not passing through fully. Your heater core gets hot from water passing throught it from the engine. Then your doors open up, in proportion to how much air is permitted to pass over the heater core.

Suggest to remove the heater core and replace it. Seems the blend doors are working properly but again, if you have a non working heater core then no air can pass over the "Hot Core" for you to recieve hot air.

If you are not mechanically inclined, then go to a local parts store and you can buy a car manual, such as Chilton's or Hane's Car manuals, for your year and make to show you how to replace it. Then you can also have it for any other problems that may arise.

Jan 24, 2010 | 2000 Ford Expedition

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Car warms up just fine but the heater blows cold air


both hoses is hot signifies thatcoolant circulation is just fine check the blend door actuator it might be stuck.pan the heater temp controller from hot to cold do you feel any change in temp of the air from the blower?if you dont feel any change check the blend door actuator

Jan 11, 2010 | 2002 Ford Taurus

2 Answers

Heat is luke warm at best on low. blows fine. had heater core flushed. still not sufficient temp.


One or more of:

1. Your coolant level is low
2. Your thermostat doesn't close and needs to be replaced
3. The valve from the cooling system to the heater core is stuck
4. Your heater core is clogged

Jan 08, 2010 | 1999 Jeep Grand Cherokee

2 Answers

My heater only blows cold air-'98 ford explorer


Hi Bri,

That is usually the first symptom of low coolant. Not enough water in the system to circulate through the heater core. Has it been running hot?

Check the coolant level in the radiator

Best regards,
Mike

Sep 22, 2009 | 1998 Ford Explorer

3 Answers

Heater


Likely it has more to do with the door that controlls the airflow. Which should be operated by vacum might check and make sure all thevacum lines are plugged in.

Does the gauge in the car show it warms up?

Feb 24, 2009 | 2001 Ford Windstar

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