I have a 1997 Ford Expedition that the heat in the front is only blowing cold, but the heat in the back works propper. I was told that it might be the blend door actuator but I can't find it. I need to no where it is and how to fix it. I also was told I can stick something in there and turn it and if it starts working that's the problem but cannot find it to check.

SOURCE: I need the location of the A/C and Heater Blend Door Actuator

take abaut 5to6 h to fix it im dane so far10 of that,door is lokete bihaind dash on heaer and ac box and dash mast be remow to fix same.Good lack big jab to fix it

SOURCE: A/C and Heater Blend Door Actuator

location is on ac and heater box under dash.Good luck big jab to fix it.

SOURCE: 2004 Ford Expedition XLT, front blend door actuator

Hope I was avle to help, glad you up and going.

SOURCE: how to replace blend door actuator in a ford

I recently did mine, I hear you can do it without taking the entire dash apart but I had no luck with it myself. I have to get ready for work but, on mine it was located down and to the left of the radio. its a white box...are you hearing a clicking noise or something? I had to roll the entire dash back and it was still a major pain getting it out.

SOURCE: 2001 FORD EXPEDITION XLT 4.6L V8 BLOWING MILD WARM

You hot air comes from the water circulated through the heater core. It is like a miniture radiator with water flowing thru it constantly. So by opening the "Blend Door" you are permitting so much of this hot air to pass thru.

Seems like for some reason your heater core is plugged up. Just like a radiator can be. So water may be passing through your heater core but not passing through fully. Your heater core gets hot from water passing throught it from the engine. Then your doors open up, in proportion to how much air is permitted to pass over the heater core.

Suggest to remove the heater core and replace it. Seems the blend doors are working properly but again, if you have a non working heater core then no air can pass over the "Hot Core" for you to recieve hot air.

If you are not mechanically inclined, then go to a local parts store and you can buy a car manual, such as Chilton's or Hane's Car manuals, for your year and make to show you how to replace it. Then you can also have it for any other problems that may arise.