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I am not getting heat from the heater. I have removed the heat blending actuator but do not know how to test it. How to I check it to see if it is defective? Gene

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This may sound funny but Put a hose on it an **** with your mouth and see if the actuator moves in and hole the sucksion with your tough to see if it holds in with out releasing...if so its good. if it don't go in or stay in , it needs replacing...hope this helps you??

Posted on May 21, 2011

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No heat cold air Mercury Sable 2001 3.0


Thermostat stuck open, low coolant level, stuck blend door or bad blend door actuator, or blogged heater core. Feel both hoses to the heater core. They should both be about the same temp. If one is hot and the other is cold, you have a clogged heater core. If both are hot, then the thermostat is working and you've got a blend air door/actuator problem. Actuator failure is pretty common on these. Remove the actuator and open the door by hand. If you get heat, replace the actuator

Jan 06, 2018 | Mercury Cars & Trucks

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I need to know if there is an external heater control valve on the eatc unit in my 2003 grand marquis /


This vehicle does NOT use a heater control valve. Coolant flows to the heater core at all times. Temperature is regulated by the blend air door and blend door actuator. Locate the blend door. Remove the actuator and open the door by hand. If you get heat, the actuator or the control head is bad. FWIW, the actuator is the most likely cause

Jan 06, 2018 | 2003 Mercury Grand Marquis

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Air blend actuator 2000 ford explorer is not working?


First, insure you do not have a vacuum leak or bad vacuum check valve. If this is all good, you may have to change actuator and every model has a different way to access this--some require dash removal. If you must do this, get a shop manual as the air bags CAN BE VERY DANGEROUS!

Mar 28, 2016 | 2000 Ford Explorer Eddie Bauer

1 Answer

Why 2005 pilot gets too much cabin heat even when turned off


There is blend door in vent channels under the dash of the vehicle. It blends warm and cool air in the vents depending on the temperature setting. The Blend Door is controlled by a motor called an actuator that gets its signals from the setting on the dash. When the actuator fails the blend door can't move. If it stops on hot you always get hot air.
3 possibilitys
1. Blend Door stuck.
2. Temperature control not sending signal to actuator.
3. Actuator motor gone bad.

Of the 3 possibilities the actuator motor is the most common and the easiest to fix. The part is $40-90. I don't know exactly where actuator is on the Pilot. My GMC you remove the plastic trim below the dash and its just to the left of the glove box near the 'hump'. Perhaps the part store can tell you or someone else will offer the exact location.

Once you remove the actuator you can plug it back in to the wire clip and move the temperature knob and see if it moves. When you get the new one plug it in and make sure it turns before bolting it in.

To clarify a bit. The heater is never technically turned off. The blend door determines how much it goes thru the vents.

May 04, 2014 | 2005 Honda Pilot

1 Answer

My 2004 Avalanche ' heating system will not heat. No matter what the setting it either blows no air or cold air and it is 25 degrees outside so this is a problem. The engine is up to temp and I have tried...


The most likely cause is a failed blend door actuator; however I recommend a little troubleshooting. First, can you hear a clicking sound behind the dash when you turn the setting to hot? If yes, it is certainly the actuator stripping its gears. If not, check to make sure the heater hoses are both hot as they connect to the heater core at the firewall (in the engine compartment). If one or both of the hoses do not get hot, there is a blockage caused either by an air bubble or a stuck water control valve in the heater hose. If the hoses are both hot, the indication is again the blend door actuator.

Below are instructions for replacing the actuator. Look at the diagrams carefully--the big arrows point to the front of the truck and the actuator is on the side of the heater box above the outlet duct that runs to the driver's side of the floor. Also, the actuator is expensive, so I recommend you make sure it's bad and shop around a bit to get a good price. To check out the actuator, first see if you can turn the blend door by hand. If you can't turn it, maybe it's jammed. Also, reconnect the actuator after removing it and see what it does when you turn the heater to hot.

Removal & Installation
  1. Remove the floor air outlet duct extension (1) from the floor duct (2).

    jturcotte_393.gif

Fig. Remove the floor air outlet duct extension (1) from the floor duct (2)


Disconnect the electrical connection at the blend door actuator (#10 in pic below). jturcotte_394.gif

Fig. Blend door actuator and related components


Remove the blend door actuator mounting screws from the HVAC module.


Remove the blend door actuator as an assembly with the actuator cam.
jturcotte_396.gif

Fig. Remove the blend door actuator mounting screws from the HVAC module



To install:

  1. Install the blend door actuator as an assembly with the actuator cam.
    1. Line up the heater/defroster valve lever with the blend door actuator cam slot.
    2. Line up the A/C valve lever with the blend door actuator cam

  2. Install the blend door actuator mounting screw to the HVAC module.
    1. Tighten the blend door actuator mounting screw to 14 inch lbs. (1.6 Nm).

  3. Connect the electrical connection at the blend door actuator (10).
  4. Install the floor air outlet duct extension (1) to the floor air duct (2).


Picture of actuator:


jturcotte_57.jpg

Dec 07, 2010 | 2004 Chevrolet Avalanche

2 Answers

2004 f350 ford heater blows cool air but hoses are both warm-where do i start looking


check to see if the blend door is moving where you change the temperature setting. I think your blend door is behind the glove box. Here are instructions for removing the actuator. Take it off, plug it back in and see if the motor rotates. Also check to see if you can rotate the blend door by hand. If you can rotate it by hand, the motor is probably broken of the gears are stripped. Let me know if you have questions.
  1. Release the stops and lower the glove compartment door.
  2. Disconnect the connector.
f4b0b74.gif Fig. Blend door actuator-F-250 & 350


  1. Remove the two screws. Rotate the blend door actuator and bracket assembly. Remove the electronic blend door actuator and bracket assembly.
  2. To install, reverse the removal procedure.

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1 Answer

My 2000 winstar has duel heat, the rear works, but the front does not.


This is most likely caused by a failure of the heater blend door actuator, which you can fix at home in about three hours (if you have small hands). The front heater is actually working, but the blend door is stuck shut by the failed actuator and is preventing the heat from reaching the dashboard vents. To get at the blend door actuator, you have to take the radio out. Behind it and built into the duct work of the heater is the actuator module, which you can remove and replace fairly easily. Good discussion here: http://www.automotiveforums.com/t389726.html

Feb 15, 2010 | 2000 Ford Windstar

2 Answers

2003 mercury grand marquis LS heater does notr blow hot air, blower blows but cold air comes what is the problem


The blend door is stuck in cold position. That usually happens because the blend door actuator has failed.

You will need to test and replace the blend door actuator.

To replace the actuator you will need to take apart the dash and remove completely the instrument panel,d isconnect the connector, remove the four screws, remove the temperature blend door actuator and replace it.

The replacement is not a job for beginners, since you have to take apart the dash to access the actuator.

Regards.


Nov 18, 2009 | Mercury Grand Marquis Cars & Trucks

1 Answer

No heat Heater core is hot


If heater core is getting coolant circulating through it then you may have a temp blend door, or blend door actuator not working properly. The blend door is located in the air box under the dash, and the actuator is located on the air box. You may be able to visually check the operation while turning the temp knob, by locating the coresponding actuator on the air box and monitoring the movement. If it is moving ok and still no heat then the blend door, or lever is broken, which will require removal of the dash.

Oct 17, 2009 | 2001 Dodge Ram 2500 Truck

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