Question about 1999 Ford Expedition

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Heat & air conditioning

The air coming from the heater or the airconditioning is the some temp. no matter where you set the temp control.

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  • Anonymous Dec 26, 2008

    Same problem on my 1998 Expedition. Front temperature controller does nothing. Now with cold weather, I have to freeze my feet and wait for the rear heater to warm up the car

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  • 49 Answers

Your ac/heater door controler motor is not working it opens and closes the trap door in the dash it is right behind the dash it cost around 140.00

Posted on Jan 18, 2009

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1 Answer

Why does my heater only blow hot air?


if only blows hot from defrost location only, then there is a vaccum leak from intake manifold to the selector switch. or the vaccum selector switch is defective. if it is a electric selector switch then the mode door is broken, common issue. when the truck if first started, is there a repetive clicking noise? if so then it would be the mode door being broken, warrenting having to remove the dash and recovering of the air conditioning refridgerent, or freon, r-12, or r-134a as this year is R-134a, draining coolant as heatercore needs removed, and removing the entire heating and airconditioning unit, located behind dash on passanger side, disasembling and replacing door. if clicking noise is pressent and time and money, and certified air conditioning mechanic not available, then finding the mode door actuator, or electric motor that turns the door, and unplugging it will cause the noise to stop, but forever have no airconditioning, as default location is defrost. if able to select from defrost to panel or floor location but heat only, then blend door is broke. i believe mode and blend door are same part number, but might not.
also check for recalls and tsb's, or technical service bullitions, as might help fix it. recalls are free, and tsb's are only to help you diagnose the problem, and you would have to pay to have fixed or fix yourself, but having to evacuate and recharge air conditioning system and haveing to have the special tools to remove ac lines it may be a job best suited for a professional. GM UPFITTER Technical Bulletins GM RECALL CENTER

Sep 12, 2014 | 1997 Chevrolet Blazer

1 Answer

1995 Xj cherokee 4.00L airconditioning comes on with heater fan


It sounds like you blend door is broken. It is about an 8 hour job to tear the dash apart and replace the actuators that control blending of hot and cold air under your dash.

Jul 14, 2010 | 1996 Jeep Grand Cherokee

1 Answer

1999 Dodge Caravan SE's intermittent heater


it sounds like a vaccume leak check under hood for vaccume line that goes through the firewall trace this line and look for leaks next pull controll unit out of dash most times this unit is worn an will leak causing lak of controll of the heat an airconditioning

Feb 13, 2010 | 1996 Dodge Caravan

1 Answer

1998 Chevy S10 pickup air condition compres is on instead of heat


First be sure that you do not have the controls set to defrost the windows since on just about all vehicles nowadays with the controls set that way the air conditioner will be turned on...even if it is not so warm outside. So...be sure that you do not have any of the controls set to defrost and that the heater is turned all the way on.

It sounds like though that the control for the vents is not operating properly. This is a combination of mechanical movements of the vent flaps and small "air motors" that operate the flaps. These air units are controlled by air vacuum taken from the engine compartment through tiny hoses. If the hoses get cracks, holes or come loose from their fittings then your vents will not move correctly so it is a matter of looking and tracing each one of the hoses to make sure they are fastened correctly, have not come loose and are not cracked or leaking. The problem can even be in the engine compartment where the hose(s) connect to the engine vacuum system...so it will take lots of looking carefully with flashlights etc....good luck.

Aug 21, 2009 | 1998 Chevrolet S-10 Pickup

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Passenger side blows hot air when front control set to Air


you cant adjust it ,this requires the dealers computer to re set it,or a phyiscal control has packed up like a vacumn pipe has split where it pushes onto the valve that controls the flap in the heater unit.

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2 Answers

Heater temp control not working


We had the same problem in our 98 GMC Jimmy. Was blowing hot air everywher with everything shut off & air conditioning would not work. We found out it was the Blend Dood Actuator, it is located behind the glovebox. We purchased one on EBay & replaced it and are back on track again. Good luck!

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1 Answer

Air conditioning


You need the AC mode/function switch to be replaced, it controls the different modes the AC/Heater are set to and where the air goes within the air ducts..

Jul 27, 2008 | 1997 Chevrolet Lumina

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