Question about Ford Expedition

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Ok this one is for a ford tech my expedition 1999 a/c works ok cooling system ok, no heat cause i had no control out temperature control,everything works but only a/c works no hot air come out vents how i repl heater plenum if this is my problem,cause electrical actuator work ok i can feel it move please only ford guy 5.4 engine

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  • leonel alvarado Aug 01, 2010

    ok maybe i not clear everything is working but but the door inside the plenun stuck i need to repl plenun please given\me one idea how is to much to ask what u tell me about heater is ok 1999 ford expedition 5.4 engine if u are ford tech u know what i talk about



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I have done lots of Ford work,my own cars,but never a heater.I would like to suggest though,sometimes a local library will have haynes repair manuals you can look at.If you're not familiar with haynes,it's as close to a manufacturers repair manual as you can get.For the library just call and ask first.If they do not have one,you can go to a national auto parts store,most of them have haynes,and maybe "thumb through" one(bring pen and paper),or purchase one.They are usually about $20-$25.That's all I can suggest.I have seen you here all night and it seems as if you are getting nowhere.Good luck!

Posted on Aug 01, 2010

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You don't get heat because the heater radiator in the car doesn't receive the hot water from the engine. This can be caused by 2 faulty parts: either the core itself is clogged by dirt and if you can't clean it with those radiator descaling solutions that you can find in car shops will have to be replaced, or the water intake valve is stuck closed and will have to be replaced.
In both cases the procedure is far too complicated to describe here. Your best option is to buy this repair manual
and follow its detailed instructions. Beware , this is a solid 2 day job, plan ahead.

Posted on Aug 01, 2010

  • Azrael SRL Aug 01, 2010

    In that case the dash must be dismantled to access the flap and replace it- most likely the strap connecting it to its controlling actuator has snapped. Again, this is a procedure that can be found in the repair manual. Beware, the dash crack easily, don't force it when you dismantle it.



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1 Answer

01 ford expedition air working but when turn to heat air conditio . doesnt turn off bn lend door working how to fix this

The only thing that can cause no heat is the blend door and or actuator or the cooling system has gas bubbles in it or the heater core is plugged with rust..

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1999 ford expedition , runs good doesn't overheat , but puts out no heat ?

heater core might need replaced . check the hoses going to it under the hood after it gets to operating temperature .One should be hot and the other not so much

Nov 19, 2015 | Ford Cars & Trucks

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I have a 1999 ford expedition and it keeps over heating on me how do i find out what causes that?

Has the thermostat ever been changed ? Is the cooling system full ? Does the cooling fan work ? Is the check engine light on ? Ever have the cooling system flushed out ? The gauge in the instrument cluster could be wrong . How does the vehicle run ? If it doesn't run very well could have blown head gasket , That could cause a overheating problem .

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1999 ford expedition carbon dioxide in the coolant

Most common cause is a leaking head gasket. The leak allows exhaust gas into the cooling system.

Dec 18, 2012 | 1999 Ford Expedition

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Hi do 1999 ford expedition have a heat control valve and where

No they do not use a heater control valve, the expedition uses whats called a blend door which is driven by whats referred to as a blend door motor,which control's the air flow though the heater core or a/c evaporator to heat or cool the passenger compartment of the vehicle.

Dec 31, 2010 | 1999 Ford Expedition

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What causes the fan to continue to run when controls are off?

This device is disclosed which causes a fan of a heating and/or air conditioning system to continue to run until the temperature in the duct work of the system reaches a desired temperature, so as to remove all heated and/or cooled air from the system, however, the device is designed so as to not cause the fan to be actuated due to changes in the duct work temperature which are due to changes in outside temperature or causes other than the operation of the system. A sensor which is located in the duct work controls the operation of the fan in response to temperature changes only if the sensor control circuit is first energized by the operation of the system.

Hope help with this (remember rated this help).

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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.

Dec 01, 2009 | Ford Expedition Cars & Trucks

2 Answers

1999 Lincoln Navigator Heating Problem

if the heater core is getting hot then the problem is the air temp control blend door actuator, a common problem.

Mar 13, 2009 | 1999 Lincoln Navigator

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2004 Ford Expedition rear floor cool/heat

Item Part Number Description 1 — Air inlet door 2 — Temperature blend door 3 — Headliner airflow 4 — Auxiliary mode door 5 — Floor airflow 6 18476 Heater core 7 19860 Evaporator core 8 19805 Blower motor
The auxiliary A/C and heating system has the following features:
  • The auxiliary A/C and heating system is functional whenever the instrument panel mounted A/C control is in any position except OFF.
  • The auxiliary blower motor recirculates the air inside the vehicle. Outside air is not available to the auxiliary system.
  • Air is cooled and dehumidified by the auxiliary A/C evaporator core only if the instrument panel mounted A/C control is adjusted to a position that requires A/C compressor operation.
  • The temperature blend door and the auxiliary mode door are controlled by electric actuator motors.
  • Movement of the auxiliary temperature control between COOL and WARM causes a corresponding movement of the temperature blend door to mix air flowing through and around the auxiliary heater core.
  • Movement of the auxiliary mode control between PANEL and FLOOR causes a corresponding movement of the auxiliary mode door to direct air flow between the panel (headliner) registers and the floor duct.
I would say the auxiliary mode door (#4) electric motor is not wokring.

Auxiliary Blend Door Actuator —Air Distribution Removal and Installation
  1. Remove the RH quarter trim panel cup holder and access panel.
  1. Remove the screws.
  1. Disconnect the blend door actuator electrical connector.
  1. To install, reverse the removal procedure.

Jan 14, 2009 | 2004 Ford Expedition

1 Answer

2000 ford expedition

The heater on your Vehicle it can be a few problems.
I will mention the Importants.

First. Check the temperature, The temperature has to be At least 140 Farenheit.
Second. With a Temperature gace check the temperature of the 2 small hoses going to the Heater core. If the Temperature is almost the same on each of the small hoses, and Close to the temperature of the engine. The circulation is good.
But if only One of the hoses are Hot and the Other no. Is because is there a restriction in the Heater core, and will be nesesary to clean or replace.

Third.. Check the Blend door actuator motor. ( Is the actuator to move from cool to hot air )
Is located at center of the Instrument panel. at lower of the Hvac housing.
Is there behind the Center console.

Ok... Check the step I giving and letme know.
Thank you for use fixya...

Nov 20, 2008 | 2000 Ford Expedition

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