Can't say for positive sure, but I would expect the Freestar/Monterey blend door actuator motor to be much like the Windstar.
Common failure, easy replacement - about $40
See "Related Questions" below for links to the Windstar related blend door discussions
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The heater flap, or blend door, is difficult to replace with OEM parts supplied from Ford. There is an aftermarket kit that makes the job and cost significantly easier at heatertreater.net or on the Ebay listing.
You have a faulty temperature blend door actuator located directly behind the radio. Remove the radio and remove the blend door actuator held to the heater case with three 8mm screws, and replace it.
The problem is the blend door, not the heater core. Any mechanic worth anything should have checked and replaced the blend doors while it was apart to replace the heater core. Check heatertreater.net for diagnostic information and some real help.
If by "heater box" you're referring to the heater core, we've got you covered with the "Related Questions" below.Be sure to review the questions regarding the blend door and blend door actuator motor - other very popular heating/cooling parts in the Windstar
There is an aftermarket kit from HeaterTreater that makes this job a breeze. Check out the product at heatertreater.net
Your heater blend door actuator has broken some teeth off internally. This is a VERY common problem in explorers. I have replaced two of them. Go to the Ford dealer an get part number yl5z-19e616-aa. Remove the left rear inside trim panel and this will allow you to access it. It takes about 30 minutes to replace.
The heater blend door is not run by vacuum. It is run by an electric actuator.
How do i replace blend door motor
To replace a broken blend door, typically a mechanic will disassemble the entire dash, and replace the plenum box. Unfortunately this is an expensive fix because it is labor and parts intensive. There is a DIY solution called heatertreater. They provide instructions on how to access the blend door by removing the glove box, and replacing the blend door without removing the dash and plenum assembly. Broken blend doors are a common problem among Ford explorers, and most heating and A/C issues in late model Ford explorers are directly caused by a malfunctioning blend door.Read more: 2004_ford_explorer_heater_problems_clikcing_noise
It does not. It is cable controlled thru a "blend door". If you are having no heat, it could be because of a clogged heater core, or the cable has came off the blend door, or the blend door control.
How do I locate the heater blend door actuator in a Ford f150 pickup