I just read on another thread some information on TSB # AC002-07 issued on May 18, 2007. The TSB can be found here:
http://www.justanswer.com/uploads/sk..._03_runner.pdf
To summarize, Toyota recommends installing a little triangle "Blower Packing" which costs $12 CDN plus tax.
It also recommends applying sealant around the blower case, and then installing a new blower motor. The sealant is approximately $22 CDN plus tax. I will use general exterior window caulking, and after thawing out the the motor and blowing it out with an air compressor, I will drill two small holes in the bottom of the original fan motor and re-install it.
Finally, it recommends installing a new, redesigned plastic cowling below the windshield which costs about $650 CDN plus tax. I think not!!!