2007 Ford Focus air circulation problem

I've got a 2007 Ford Focus SE that I bought about eight months ago. In the fall, I noticed that my windows were fogging up more than usual, and tended to be complimented with a musty odor. Sometimes when my
windows fog up, turning the fan up sometimes makes the problem worse, to the point where I have to roll down the windows with the fan on high blast, which is not fun in the winter!
Also, when I've got my front vents (face, whatever they're called) turned on, the musty smell comes back, and if I try to turn on my air recirculation button, nothing happens. If my windows are rolled up, there are absolutely no outside smells entering the vents.
What does the problem sound like, and what could I do to fix it?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Sounds like the recirc is stuck on, so you never get fresh air, and moisture just stays in the car. The musty smell can happen anyway with ac, but will be worse if ther's no fresh air blowing in.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Make sure the evaporator drain is not plugged up. If it is plugged, condensation will build up in the evaporator box and cause the symptoms you have described.
Ed
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.