Question about 2000 Ford Expedition

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Heater valve I need to know does the same heater valve control the front and rear heat in my 99 expedition? Since the hoses to the rear just T off from the main hoses I think it would. If not is the heater vavle possibly the problem why my front heat doesn't work and my rear does?

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  • Anonymous Mar 30, 2014

    need to know flow direction on heater hoses. Is top hose of heater inpu or output

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There is no heater control valve in this truck, heat control is done through what are called blend doors. So the issue may be the front blend door motor has failed, this is very common on all Ford heatimng systems except the Focus.

Posted on Dec 17, 2008

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If the front heat doesn't work, but the rear does, it's most likely one of two problems: (1) the front "blend door" is broken, and not changing position when the switch is moved from cold to hot, or (2) the front heater core is plugged. You can figure out if it's the heater core by checking the inlet and output hoses on the heater core, with the vehicle up to operating temparature. They're in the engine bay, passenger side, going through the top fo the firewall. If only one is hot, then the heater core is plugged. You can also check the blend door by flipping down the glovebox, and drilling an observation hole into the plenum (see YouTube videos on "blend door" and "heatertreater" to figure out the location). If you drill a hole of 3/4" or larger, you can easily cover it again with duct tape, but use the hole to see whether the blend door moves when you change the switch position. Replacing either is a big job, but the heatertreater video shows you the "easy" way to fix the blend door.

Posted on Nov 29, 2010

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1 Answer

2002 Expedition heating


have you checked the coolant level? also the hoses after the engine has been running for a while should be more than warm, they should be hot. the in hose should be so hot you can not hold on to it for long.

you may have a plugged heater core, try removing hoses to front and rear units and use a water hose to flush, do this good, start withfront one stick hose on one hose and see what comes out the other end of the core, then which to other end of the core, you may need a small hose about 3ft to slide onto heater core end to then put hose nozzle on the other end of small hose then hit handle to force water through. do this to both cores.

Dec 29, 2012 | 2002 Ford Expedition

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Can not find heater control valve 2000 expedition


what year? for 2000, there are no control valves. It mixes a/c air with heater core air to blend the right temp.

SECTION 412-02: Heating and Ventilation 2000 Expedition/Navigator Workshop Manual
DESCRIPTION AND OPERATION Heating/Defrosting The heating and defrosting system has the following features:
  • Controls the temperature and, during A/C operation, reduces the relative humidity of the air inside the vehicle.
  • Delivers heated or cooled air to maintain the vehicle interior temperature and comfort level.
  • Controls the A/C blower motor speed.
  • Cooling or heating can be adjusted to maintain the desired temperature.
  • Uses a reheat method to provide conditioned air to the passenger compartment.
  • The blower motor draws outside air through the A/C recirculating air duct, except for MAX A/C cooling, when recirculated air is used.
  • All airflow from the blower motor passes through the A/C evaporator core.
  • The temperature is then regulated by reheating a portion of the air and blending it with the remaining cool air to the desired temperature.
  • The temperature blending is controlled by the temperature blend door, which regulates the amount of air that flows through and around the heater core, where it is then mixed and distributed.
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Dec 01, 2009 | Ford Expedition Cars & Trucks

3 Answers

Why does my Heater blow cold air in the front


its the blend door behind the glove box. I had the same problem

Nov 11, 2009 | 1998 Ford Expedition

1 Answer

Front heat does not heat..but the back heat does..


your vacuum hose to the mixing valve is likely disconected

Nov 01, 2009 | 1999 Ford Expedition

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I need to know where the heater control valve is located on my 1998 Toyota Sienna is located. I have Front and rear controls.


Hello brenda_peter: My name is Roger and I will help you. You will find the heater control valve under the hood. Locate the brake booster. Look to the left and you will see a valve with 3 hoses on it. The valve will also have a cable on the top of it. This is the valve you asked about. This is the only valve. It controls the front and rear heat. Should you need further help please just ask. Please rate the quality of your answer. This way I know it was helpful. Thank You for using Fix Ya. Roger

Oct 19, 2009 | 1998 Toyota Sienna

1 Answer

99 Expedition blows cold in front but not in rear cabin. Heater will work in rear, but no A/C. Front A/C and heat is normal.


somewhere in the cabin there is a panel, behind it there will be a small vacuum valve that opens duct heat/cool for the back. I had it go bad in a windstar and stuck on heat, too lazy to replace so i'd pull panel and manually move it once or twice a year

Aug 15, 2009 | 1999 Ford Expedition

1 Answer

No back heat in Expedition, Blows cold air but front works fine


Shelly,

Buy used parts at car-part.com. Look on page with * to find the cheapest part. Coud be your temp blend door (#2) may not be moving back and forth. Or, you are not getting hot water to the rear heater core.

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You may have to crawl under the truck and feel the heater hoses to see if they are hot. You will find a group of 4 lines, 2 for heater and 2 for a/c. If hot, you know hot water is getting back to the heater core. If not, there may be a hot water vave that's not working. Not sure if EXP. has a water valve for rear.

Let us know what you you find. Good luck.

Feb 22, 2009 | 2000 Ford Expedition

1 Answer

2000 expedition heat problem


first of all I would make sure the car has proper amount of coolant and you are right it is very possible you have an air pocket in the system also ask your self did you change the thermastat after you did the heater core when the car is cold make sure there is coolant at the cold mark on the reservior bottle because you might not have enough coolant then start the car and get it up to temp and if the coolant goes not go up to the hot mark when the car gets to temp you do not have enought coolant just keep adding coolant and you will see the bubble after the thermastat opens

Jan 02, 2009 | 1999 Ford Expedition

1 Answer

99 expedition heater valve


yes to the first question
and yes it is the blend doors
recommend get another unit for the control or take that control out and see if one of the tubes is broken off the control unit

Dec 15, 2008 | 2000 Ford Expedition

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