Spray a little Lysol (or some kind of disinfectant) into the carpet. I'd just use the steam cleaner with some oxyclean. Once you know where the leak is would be the right time to replace or fix gaskets. It might end up being something really simple.
The carpet and pad are now dry. I am going to soak them with a solution of borax and vinegar to kill the mold. Then I will shampoo them with oxyclean.
I did not have any lysol on hand but had several gallons of listerine that I use for a kennel spray. I poured some in those vents on the hood and now my a/c does not have that stinky moldy smell.
Maybe it will never rain again and I wont have a leak anymore
