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How to replace Heater core and actuator - 1998 Chevrolet Malibu

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  • Chevrolet Master
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For heater core replacing procedure. I suggest you to go through this related help links.Its all complete step by step procedure: ----How to replace heater core for All car models?

Click the link below: ---

http://technoanswers.blogspot.com/2011/11/how-to-replace-heater-core-for-all-car.html

--------------
How to Flush Heater Core?

http://schematicsdiagram.blogspot.com/2011/12/how-to-flush-heater-core.html

---------------
How to Remove Heater Core ?

http://howtobyme.blogspot.com/2011/12/how-to-remove-heater-core-on-2008-honda.html
Heater Core Replacement?

http://howtobyme.blogspot.com/2011/12/honda-heater-core-replacement.html

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To replace heater core?http://technoanswers.blogspot.in/2012/02/how-to-replace-heater-core-on.html------

How to replace heater core?http://technoanswers.blogspot.in/2012/02/how-to-replace-heater-core-on_10.html
How to replace heater core on Buick Regal?

http://howtobyme.blogspot.in/2012/02/how-to-replace-heater-core-on-buick.html
----------This will help.Thanks.

Posted on Feb 29, 2012

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2007 Buick Lucerne Heater Actuator


Check basics first: is there hot water being fed to the heater core?,does the valve work (open/close)that feeds water circulation to the heater core????. Hope this helps. Alberto

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This may be one of those where the entire dash has to come out to do the heater core.
But you only want to replace the core if it is plugged, or leaking. There is an easy way to tell if it is plugged: with the engine at normal operating temperature, and the control valve open so coolant will circulate, now feel both heater hoses. If core is blocked, only one hose will be hot. If core is circulating correctly, both hoses will be hot. If they are, you don't need to change out the core. One of your vacuum actuated doors is the problem, the blend door that lets air from the blower motor pass over and around the heater core.

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How Do I Replace The Heater Core In My 1999 Daewoo Leganza


Removal Procedure Disconnect the negative battery cable.
  1. Remove the instrument panel from the vehicle.
  2. Remove the heater/air distributor case from the vehicle.
  3. Disconnect the vacuum actuators from the vent-floor door and the defroster door.
  4. Remove the vacuum actuators from the heater/air distributor case.
  5. Remove the screws that secure the heater core cover to the heater/air distributor case assembly.
  6. Slowly separate the lower heater core cover from the rest of the assembly.
Remove the screw and the bracket clamp that secure the heater core lines to the case.
  1. Remove the spring clamp that secures the heater core body to the case.
  2. Remove the heater core from the case.

Feb 28, 2011 | Daewoo Leganza Cars & Trucks

1 Answer

No heat


Check that the heater hoses (2) that enter the firewall to the heater core are getting hot. If not, then the heater core is plugged up. If it is plugged up it will have to be flushed out or replaced.

If the heater core hoses are getting hot but it's not getting hot in the cabin, then it's a bad blend door actuator which is actuated by a vacuum tube.

Good luck on this repair.

Feb 09, 2011 | 1993 Eagle Summit

1 Answer

The heat in my 2006 grand prix will not get hot. We replaced the thermostat and got nothing. So I got the radiator flush and force filled again. Still nothing. Temp of the motor still gets to the middle,...


Are the 2 tubes that go to the heater core getting hot? If so, then the blend door is not opening to allow heat to get to the cabin.

Possible vacuum motor problem, either disconnected, or the controller for the blend door is broken is likely problem.

Troubleshooting by Symptom Poor Heater System Performance CAUTION
Check all fluid levels and adjust as needed, before operating vehicle for extended periods at idle.
  1. Start the engine.
  2. Idle the engine until the thermostat opens (upper radiator hose will be hot) Is the engine at normal operating temperature (approx. 200° F)? If yes, go to the next step. If no, go to step 16.
  3. Set the mode selector to FLOOR mode.
  4. Set the heater control selector to the warmest temperature setting.
  5. Set the blower speed the lowest setting.
  6. Carefully feel the inlet and outlet heater hoses at the heater core. Is the inlet heater hose significantly hotter than the outlet heater hose? If yes, go to step 14. If no, go to the next step.
  7. Set the mode selector to PANEL mode.
  8. Select the maximum blower speed.
  9. Select the warmest temperature setting.
  10. Place a thermometer into the center I/P PANEL air outlet and affix a second thermometer to the heater core outlet heater hose.
  11. Record the temperature at the center I/P PANEL air outlet and at the heater core outlet heater hose. Are the two temperature readings about equal? If yes, go to the next step. If no, go to step 13.
  12. Inspect and repair the cowl, cowl area, recirculation door, and the HVAC evaporator/heater core case for cold air leaks. Repair any problems found, go to step 17.
  13. Inspect the temperature door operation. Repair any problems found, go to step 17.
  14. Turn OFF the engine. Back-flush the heater core. Start the engine. Select the FLOOR mode and the lowest blower speed. Select the warmest temperature setting. Feel the temperature of the inlet and outlet heater hoses at the heater core. Is the inlet heater hose feel significantly hotter than the outlet heater hose? If yes, go to the next step. If no, go to step 17.
  15. Replace the heater core. When the repair is completed, go to step 17.
  16. Check for low engine temperature problems, Repair or replace as needed, go to step 17.
  17. Operate the system in order to verify the repair. If the system operates properly, the repair is complete. If the heater still does not work properly, repeat the entire procedure.
Air Door Actuators/Motors Removal & Installation Recirculation Actuator To Remove:
  1. Remove the right lower instrument panel (I/P) insulator.
  2. Remove the glove box assembly. Recirculation actuator (Typical) gm-10-00-3695.gif

  3. Remove the mounting screws and recirculation actuator from the HVAC module assembly.
  4. Disconnect the recirculation actuator harness connector.
To Install:
  1. Align the recirculation actuator slots with the flats on the actuator door shaft.
  2. Install and secure the recirculation actuator on the HVAC module assembly with the mounting screws.
  3. Connect the recirculation actuator harness connector.
  4. Install the glove box assembly.
  5. Install the right lower I/P insulator.
  6. Calibrate the recirculation actuator.
Mode Actuator To Remove:
  1. Remove the right lower instrument panel (I/P) insulator.
  2. Remove the glove box assembly. Mode actuator gm-10-00-4356.gif

  3. Remove the mounting screws and mode actuator from the HVAC module assembly.
  4. Disconnect the mode actuator harness connector.
To Install:
  1. Align the mode actuator slots with the flats on the actuator door shaft.
  2. Install and secure the mode actuator on the HVAC module assembly with the mounting screws.
  3. Connect the mode actuator harness connector.
  4. Install the glove box assembly.
  5. Install the right lower I/P insulator.
  6. Calibrate the mode actuator.
Air Temperature Actuator Right Side To Remove:
  1. Remove the right lower instrument panel (I/P) insulator.
  2. Remove the glove box assembly. Air temperature actuator (right side) gm-10-00-4356.gif

  3. Remove the mounting screws and right air temperature actuator from the HVAC module assembly.
  4. Disconnect the right air temperature actuator harness connector.
To Install:
  1. Align the right air temperature actuator slots with the flats on the actuator door shaft.
  2. Install and secure the right air temperature actuator on the HVAC module assembly with the mounting screws.
  3. Connect the right air temperature actuator harness connector.
  4. Install the glove box assembly.
  5. Install the right lower I/P insulator.
  6. Calibrate the mode actuator.
Left Side To Remove:
  1. Remove the left lower instrument panel (I/P) insulator. Air temperature actuator (left side) gm-10-00-4357.gif

  2. Remove the mounting screws and left air temperature actuator from the HVAC module assembly.
  3. Disconnect the left air temperature actuator harness connector.
To Install:
  1. Align the left air temperature actuator slots with the flats on the actuator door shaft.
  2. Install and secure the left air temperature actuator on the HVAC module assembly with the mounting screws.
  3. Connect the left air temperature actuator harness connector.
  4. Install the left lower I/P insulator.
  5. Calibrate the mode actuator.

Oct 18, 2010 | 2006 Pontiac Grand Prix

1 Answer

How To Replace The Heater Core In A 1997 Ford Thunderbird LX


Heater Core Removal
  1. Partially drain the cooling system.
  1. Remove the tube gasket from the heater core tubes.
  1. Remove four heater core access cover retaining screws and remove the access cover from the A/C evaporator housing (19850).
  1. Remove A/C electronic blend door actuator.
  1. Slide heater core (18476) and seals from the A/C evaporator housing.
Installation
  1. Install the heater core in the A/C evaporator housing with the tube gasket on the outside of the case.
  1. Install A/C electronic blend door actuator as described.
  1. Position the heater core cover on the A/C evaporator housing. Install the four retaining screws.
  1. Refill the cooling system.


    1a302ce.gif




    Item Part Number Description 1 18596 Heater Core Tube Gasket 2 18476 Heater Core 3 18B300 Heater Core Cover 4 390747-S2 Screw (4 Req'd) 5 18N267 Heater Core Cover Seal


    Hope this helps... Cobra

Jun 12, 2010 | 1997 Ford Thunderbird LX

1 Answer

Need to replace heater core on 96 tbird....I have Instrument panel out.....glove box out.....center console (climate control unit and stereo) out......have heater hoses disconnected and two mounting nuts...




Section 12-03A: Air Conditioning System—Manual A/C-Heater 1996 Thunderbird, Cougar Workshop Manual REMOVAL AND INSTALLATION Heater Core Removal
  1. Partially drain the cooling system.
  1. Remove the tube gasket from the heater core tubes.
  1. Remove four heater core access cover retaining screws, and remove the access cover from the A/C evaporator housing (19850).
  1. Remove A/C electronic door actuator.
  1. Slide heater core (18476) and seals from the A/C evaporator housing (19850).
Installation
  1. Install the heater core (18476) in the A/C evaporator housing (19850) with the tube gasket on the outside of the case.
  1. Install the A/C electronic door actuator as described.
  1. Position the heater core cover on the A/C evaporator housing (19850). Install the four retaining screws.
  1. Refill the cooling system.


    Heater Core





    Item Part Number Description 1 18596 Heater Core Tube Gasket 2 18476 Heater Core 3 18B300 Heater Core Cover 4 390747-S2 Screw (4 Req'd) 5 18N267 Heater Core Cover Seal
  2. 3e541cd.gif

      Feb 16, 2010 | 1996 Ford Thunderbird LX

      2 Answers

      Front heater core, what is the book time to replace?


      The heater core mission. As for discharging the A/C system, I would like to state for the record that it is not necessary to discharge the A/C system to exchange the Heater core on an 98 Expedition/Navigator, just drain the coolant, remove the dash, open up the box that house the A/C system core and the Heater core, remove and inspect the blend door for cracks where it attaches to the actuator, check the blend door actuator then cut the metal lines on the top of the heater core off for easy removal, from the engine compartment pull the heater core lines through the firewall for easy disconnect and that is it, you are now ready to start the re-install process. One thing I recommend is while you have everything apart change the blend door actuator, especially if you see traces of where the coolant was leaking in the box. 9 out of 10 times the coolant leaked out through the actuator and it is just a matter of time before the electrical circuitry in the actuator quits working leaving you with no heat or only heat. Well moving on to other issues now that heat works and spring is near. Good luck and install in reverse, take pictures with your cell phone to use as reverence on things you took apart and Merry Christmas.

      Dec 02, 2009 | 1998 Ford Expedition

      2 Answers

      Need to remove heater core from 2000 Daewoo Nubira


      1. Disconnect the negative battery cable.
      2. Remove the instrument panel from the vehicle.
      3. Remove the heater/air distributor case from the vehicle.
      4. Disconnect the vacuum actuators from the vent/floor door and the defroster door.
      5. Remove the vacuum actuators from the heater/air distributor case.
      6. Remove the screws that secure the heater core cover to the heater/air distributor case assembly.
      7. Slowly separate the lower heater core cover from the rest of the assembly
      1. Remove the screw and the bracket clamp that secure the heater core lines to the case.
      2. Remove the spring clamp that secures the heater core body to the case.
      3. Remove the heater core from the case.
      1. Install the heater core into the case.
      2. Secure the heater core lines to the case with the retaining bracket clamp and the screw. Tighten the heater core retaining bracket screw .
      3. Install the heater core body with the retaining spring clamp.
      1. Install the heater core cover.
      2. Install and tighten the screws that secure the heater core cover to the heater/air distributor case assembly. Tighten the heater core cover screws
      3. Install the actuators for the vent/floor and the defroster doors.
      4. Install the heater/air distributor case.
      5. Install the instrument panel.
      6. Fill the cooling system
      7. Connect the negative battery cable.

      Jun 18, 2009 | 2000 Daewoo Nubira

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