Strange" hot spot" on new F Expedition

Hi, I hope someone can help. I have a new ( 2 weeks old ) Ford 2005 Expedition. The dealer is 50 miles away and I don't have a day to take off to go there..so I am hoping someone can give me some assistance.
In the rear, passenger side, cargo area of the Expedition, the plastic side-wall, about ten inches up, has a "hot spot" . I noticed it because I had an umbrella leaning up against it, and when I picked up the umbrella, it was hot to the touch. Sure enough, the plastic feels like there is a small furnace underneath it. There is NOTHING ( except hidden connections ) that is anywhere near this area.
The only other clue I have is that I don't believe that the rear window defrosters ( electric) work very well. Any ideas? Thanks vm
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RichG manager, Carolina Skiff Owners Group on MSN
http://groups.msn.com/CarolinaSkiffOwners
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Just a wild guess... does it have a rear heater-A/C unit? Could it be a heater core back there staying hot?
If you look under the car, are there water & A/C lines going to that area?
Erik
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Is it possible that it is the subwoofer amp for the Mach 300 sound system? For the Escape, there's a picture of the subwoofer and the "hidden" amp, which is in the right rear of the cargo area. <http://www.ford.ca/main/default.asp?section=1&language=en&sVehCategory=fordsuvs&sModel=Escape&page=mm_cc.asp
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Clarence A Dold - Hidden Valley (Lake County) CA USA 38.8,-122.5


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