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HVAC heater blend door actuator is not working

I have a 2008 Hyundai Elantra GLS and one day the temperature control would not blow hot air. I narrowed down the problem to the HVAC Heater Blend Door Actuator. The Blower Fan and the Mode Actuator both work fine. I replaced the old Heater Blend Door Actuator with a new one and the new actuator still doesn't respond when I try to move the temperature dial. Is this a wiring issue, or the climate control unit? I've been pulling my hair out trying to diagnose the problem and I need help.

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Do you happen to remeber where the blend door actuator is located?

Posted on Sep 29, 2014

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  • Hyundai Master
  • 14,036 Answers

Check HVAC fuse.if fuse okay heater control module could be the problem.

Posted on Nov 19, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

c17hydro
  • 2984 Answers

SOURCE: Not hot air whn control is moved to hot

PLEASE DON'T FORGET TO RATE!

Removal & Installation

  1. Disconnect the negative battery cable.
  2. Lower the glove compartment door to provide access to the recirculation duct assembly.
  3. Disconnect the vacuum hose from the end of the vacuum motor and the motor arm retainer from the door crank arm.
  4. Remove the two nuts retaining the vacuum motor to the recirculation duct, then remove the motor.
To install:
  1. Position the vacuum motor to the fresh air/recirculate door crank arm, position the motor to the recirculation duct and install the two retaining nuts.
  2. Install the retainer on the door crank arm.
  3. Connect the white vacuum hose to the vacuum motor, connect the negative battery cable, then check the operation of the vacuum motor.
  4. Close the glove compartment door.

Posted on Oct 25, 2009

bunnydawg
  • 5158 Answers

SOURCE: 2002 Ford Crown Vic 4.6L. EATCM A/C, Heating

that clicking noise you hear is likely a relay in the fuse panel that needs to be replaced. the easiest way to find out which relay it is would be to put you finger on each relay as you actuate the device not working. once you locate the clicking relay replace it . to reset the computer just unhook the battery for about ten minutes. if you have an anti theft radio make sure you know the code for it and how to enter it before you unhook the battery.

robert

Posted on Nov 27, 2010

  • 1 Answer

SOURCE: Air conditioner blows hot air after 30 seconds on

I have had this problem. I am not a mechanic...so to correct the issue temporarily, I simply turn off the car and restart. This has worked everytime for me. In extreme cases, I think you can also remove the AC fuse and start the car, which will also reset the computer. I also think that by taking the climate control off the "AUTO" setting has worked in the past.

Posted on Oct 27, 2009

  • 1311 Answers

SOURCE: hvac system blow hot air

Attached is a diagram of actuator locations

freddyboy61_10.jpg

Posted on Aug 13, 2011

bill_rees35
  • 5 Answers

SOURCE: Air blows hot air all the time

If the actuator is moving when you move the control it may be a broken or warped plastic door. If the actuator does not move look for a bad control unit or a vacuum leak.

Posted on Mar 05, 2012

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1 Answer

2000 dodge caravan heater blowing cold air only car does not overheat


Feel the heater hoses where they go through the firewall. If they're both hot but you're not getting any heat, your blend door is not moving to mix heated air with unheated air. It could be the blend door actuator not working or the HVAC control unit not working.

Mar 31, 2017 | 2000 Dodge Caravan

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08 dodge nitro blows hot air on passenger side but cold air out the drivers side!! Any answers




NOTE: LHD model shown. RHD model similar. All vehicles are equipped with a common heater, ventilation and air conditioning (HVAC) housing assembly (1). The heating-A/C system combines A/C, heating, and ventilating capabilities in a single HVAC housing mounted within the passenger compartment behind the instrument panel. The HVAC housing assembly includes:
  1. Mode-air doors (2)
  2. A/C evaporator (3)
  3. Recirculation door actuator (4)
  4. Air inlet housing (5)
  5. Recirculation-air door (6)
  6. Blower motor (7)
  7. Blower motor resistor (8)
  8. Heater core (9)
  9. Air distribution housing (10)
  10. Blend-air door (11)
  11. Blend door actuator (12
  12. Floor distribution ducts (13)
  13. Mode door actuator (14)

Jan 28, 2015 | 2008 Dodge Nitro

1 Answer

Accessing the climate control cable


climate control is control by a controller or computer which read inside car temperature sensor and ambient sensor.best have vechicle check at garage you need diagnostic equipment to trouble shoot climate control.many things cause climate control problems. could have faulty temperature blend door actuator or bad sensor.

Jun 11, 2013 | 2008 Hyundai Elantra

2 Answers

The truck 2005 ford 350 the heat is not working is blowing cold air


Check for correct coolant mixture. Also you could have a thermostat that is stuck completely open causing it to flow straight threw the engine block, cylinder heads, heater core, an radiator without stopping long enough to heat the coolant up to provide cab heat. It could also be a clogged heater core. Or a blend door on the HVAC box that is not allowing the heater core door to open. Hope this helps.

Nov 27, 2012 | 2005 Ford F 350 Super Duty

5 Answers

My 1997 ford f150 heater will not blow hot air. i have replace the switch that controls the hot and cold air. i do not know what else to do. i do not heat any vacuum noise when i switch it to the heater or...


first, check under te hood to see if the heater core water hoses are hot going in and coming out. If hot going in but cold coming out, water valve (if you have one) may not be working.
------------------------------------------------------------------------------------------------
Control System Outputs
The air management doors are controlled by vacuum control motors (18A318) and an A/C electronic door actuator motor (19E616). The air inlet and distribution doors are controlled by vacuum control motors. The temperature blend door is controlled by the A/C electronic door actuator motor.
The A/C electronic door actuator motor provides a variable number of temperature blend door positions. Temperature control position energizes the A/C electronic door actuator motor moving the temperature blend door.
Vacuum control motors are used on both air distribution and air inlet doors. The air inlet and panel/defrost doors use a two position vacuum control motor. The floor duct/panel door uses a three position vacuum control motor. Vacuum control motors are controlled by engine vacuum through the climate control head.
For more information on the control components Section 412-04 .
-------------------------------------------------------------------------------------------------------------------------------------
Air Management Doors
The air management doors are controlled by vacuum control motors (18A318) and an A/C electronic door actuator motor (19E616). The air inlet and distribution doors are controlled by a vacuum control motor. The temperature blend door is controlled by the A/C electronic door actuator motor.
The A/C electronic door actuator motor provides a variable number of temperature blend door positions. Temperature control position energizes the A/C electronic door actuator motor moving the temperature blend door.
Vacuum control motors are used on both air distribution and air inlet doors. The air inlet and panel/defrost doors use a two position vacuum control motor. The floor duct/panel door uses a three position vacuum control motor. Vacuum control motors are controlled by engine vacuum through the climate control head.
-------------------------------------------------------------------------------------------------------------------
Section 412-04: Control Components - Climate Control 1997 F-150, F-250 Workshop Manual
REMOVAL AND INSTALLATION A/C Electronic Actuator
Removal
  1. Remove the floor duct panel.
    • Remove the two plastic push pins (one each side) and release the expander clip.
  1. Remove the RH instrument panel brace.
    1. Remove the lower nut.
    1. Remove the upper bolt.
    1. Remove the brace.
  1. Remove the LH instrument panel lower nut and position brace out of the way.
  1. Disconnect the vacuum harness from the vacuum actuator.
  1. Remove the floor duct.
    1. Remove the two screws (one each side).
    1. Remove the floor duct.
  1. Remove the panel/floor door vacuum control motor.
    1. Disconnect the vacuum line connector.
    1. Remove the two panel/floor door vacuum control motor screws.
    1. Slide the rod out of the door and remove the panel/floor door vacuum control motor.
  1. Remove the electronic actuator.
    1. Disconnect the electrical connector.
    1. Remove the three screws.
    1. Pull down to release the actuator shaft and remove the electronic actuator.

Jan 24, 2011 | 1997 Ford F150 Regular Cab

2 Answers

I have a 2002 Jeep Liberty Limited, 3.7 L motor. The heater will not blow hot air. The A/C and fan work well. When I turn the temperature dial to hot, there is only cold air coming out. Can you assist me?


Jeeps are notorious for having broken temperature control (Blend Air) doors. A malfunctioning Blend Air Door actuator probably caused it to break. The dash will have to be removed to replacethe door and the door actuator.

Jan 16, 2011 | 2002 Jeep Liberty

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

My heater doesnt blow hot air when i turn the heat on it is cold. when i change the knob from hot to cold there is do difference. also my temp gauge stays where it needs t be right in the middle. help i...


Suspect it is the blend door actuator, but please see my tip at http://www.fixya.com/cars/r6235876-no_heat_fan_blowing_cold_air . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info. Below are instructions for replacing the blend door actuator, but don't replace it unless you're sure it's bad. Autozone has it for $36. First, take it out, plug the connector back in and see if it turns when you change the temperature control. If not, the problem can be in the controller or the actuator. If it is clicking, the problem is stripped gears. If it isn't doing anything, you can check for voltage at the connector with a voltmeter. Connect the black meter lead to a good ground point and probe the connector terminals with the red lead while changing the temperature setting.


Blend door actuator removal and installation:

  • Remove the fuse labeled HVAC CTRL (BATT).
  • Remove the left closeout panel.
  • Remove the knee bolster.
  • Remove the air temperature actuator screws.
  • Remove the air temperature actuator.
  • Remove the air temperature actuator wire harness connector.

    d02fb36.gif


  • Fig. Air temperature actuator removal
    To install:

    1. Install the air temperature actuator wire harness connector.
    2. Install the air temperature actuator and tighten the mounting screws to 13 inch. lbs. (1.5 Nm).
    3. Install the knee bolster
    4. Install the left closeout panel.
    5. Install the fuse labeled HVAC CTRL (BATT).

    Oct 31, 2010 | 2004 Chevrolet Malibu

    1 Answer

    The heater/vent system will not blow warm/hot air even when dialed to 90 degrees on climate control


    On a newer truck such as yours, the problem is usually the blend door actuator. First try a recalibrations of the system. Remove the HVAC fuse for a couple minutes and then put it back in. Start the truck and let it idle for a few minutes. Check to see if that fixed it.
    If not, next check the actuator. I will paste instructions below for taking it out. Once you have it out, plug the connector back in and see if it turns when you change the temperature control. If not, the problem can be in the controller or the actuator. If it is clicking, the problem is stripped gears. If it isn't doing anything, you can check for voltage at the connector with a voltmeter. Connect the black meter lead to a good ground point and probe the connector terminals with the red lead while changing the temperature setting. The part costs $140, so do what you can to make sure it's bad before putting a new one in. Also, it may be worth your time to read my post at http://www.fixya.com/cars/r6235876-no_heat_fan_blowing_cold_air for other ideas. Please let me know if you have questions.

    1. Remove the floor air outlet duct extension (1) from the floor duct (2).
    3270ebc.gif

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

    2. Disconnect the electrical connection at the blend door actuator (10).

    3beb6ca.gif

    Fig. Blend door actuator and related components


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

    4. Remove the blend door actuator as an assembly with the actuator cam.

    8a083a6.gif
    Fig. Remove the blend door actuator mounting screws from the HVAC module

    Oct 31, 2010 | 2006 Chevrolet Silverado

    2 Answers

    Heating system only blows out hot air through the vents


    I would look at the air blend doors first, it sound like they are not working or your control in the dash is not working send a signal to them. they work by changing the air from hot to cold or in between.

    Avalanche, Sierra And Silverado
    1. Remove the floor air outlet duct extension (1) from the floor duct (2). 0900c152801c9c8a.jpgRemove the floor air outlet duct extension (1) from the floor duct (2)
    2. Disconnect the electrical connection at the blend door actuator (10). 0900c152801c9c8b.jpgBlend door actuator and related components
    3. Remove the blend door actuator mounting screws from the HVAC module.
    4. Remove the blend door actuator as an assembly with the actuator cam. 0900c152801c9c8c.jpgRemove 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). 0900c152801c9c8b.jpgBlend door actuator and related components
    4. Install the floor air outlet duct extension (1) to the floor air duct (2).
    C/K Series
    1. Disconnect the electrical connector to the mode actuator that is located on the left side of the air distribution case.
    2. Remove the screws.
    3. Remove the adjuster links from the control lever.
    4. Remove the mode actuator.
    5. Adjust the mode actuator by completing the following steps:
      1. Connect the electrical connector to the actuator.
      2. Turn the ignition switch to the RUN position. Allow the self-positioning of the actuator.
      3. Turn the ignition switch to the OFF position.
      4. Remove the actuator from the electrical connection. 0900c152801c9c8d.jpgBlend door actuator-C/K Series
    To install:
    1. Install the mode actuator.
    2. Install the screws.
    3. Install the adjuster links to the control lever.
    4. Connect the electrical connector.
    5. Test the circuit operation

    Nov 27, 2008 | 2001 Chevrolet Silverado

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