[wixer]

Just another note of thanks to Wizzer for the fix. My wife's 02 had the same issue, and I googled all kinds of things but the official name of the part (heat controller).

Took it to the dealer, who had it all day, then they called and said it was the heat controller (so that's what its called!) and would be $758 to fix, and the part was backordered!

I hit google again and found this threat. I just saved $750 buck and the wife has heat in her car again. Thanks!