Heater core diagram and replacement?

  • 1996 FORD F-150
  • V8
  • 4WD
  • 166,600 MILES
I need a diagram of where my heater core would be located in my ford truck. I have a problem with my heater core spewing mist onto my windows after the pressure and the temprature drops from the vehicle. I want to just bypass the heater core all together so that I can run it without my heater core.
I dont need a heater until winter time anyways and I live in Texas so there isn't much of a winter here.

Please help
Do you
have the same problem?
Thursday, March 5th, 2009 AT 1:51 PM

1 Reply

Here are instructions on how to replace the heater core in your truck with diagrams below.

Passenger side behind/under the dash Removal

1. Allow the engine (6007) to cool. Then, observing the safety precautions in Section 03-03 of the Powertrain, Drivetrain Manual, proceed as follows.
2. Place a thick cloth over the radiator cap.
3. Turn the cap slowly to its first stop to release system pressure.
4. When the pressure has been released, tighten the radiator cap.
5. Disconnect the heater water hoses (18472) from the heater core (18476), and plug the heater water hoses.
6. For easier access, remove the glove compartment.
7. From inside the passenger compartment, remove the seven screws that attach the heater core cover (188300) to the heater air plenum chamber (18471). It will be necessary to move a RA8S module out of the way on F-Series prior to removing the cover.
8. Disconnect the vacuum source. Leave the vacuum hose harness (19C827) attached to the cover. Remove the cover.
9. Remove the heater core from the heater air plenum chamber.


1. Position the heater core and seal in the plenum heater air plenum chamber.
2. Install the heater core cover on the heater air plenum chamber and secure it with its seven attaching screws. Be certain that the vacuum hose harness is not trapped or pinched during the cover installation. Reinstall RA8S module if applicable.
3. Connect the vacuum hose harness to its source. Install heater water hoses on the heater core at dash panel in engine compartment. Do not overtighten the clamps.
5. Check coolant level and add coolant as required. Refer to Section 03-03 in the Powertrain, Drivetrain Manual.
6. Check system for proper operation and coolant leaks.


Here is a guide on heater hose replacement.It isn't vehicle specific, but they are all pretty much the same when it comes to this. You can just use a hose connector where they attach to the heater core to by-pass it. Also one on heater core replacement if you want to check it out



If you have AC you will need to vacuum down and recharge the system.

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
Was this
Monday, April 19th, 2021 AT 3:13 PM

Please login or register to post a reply.

Sponsored links