I have an American Standard Freedom 90 furance. It just started leaking and I've determined thta it is originating from behind/around the inducer blower? I did some research and was told it was most likely a cracked "transition receptacle ". I did an internet seach, but nothing came up about transition receptacle . Is there another name for this part? And where is the best place to order the part?

It looks like this would be an easy job to do myself. Thanks for any advice.

is it possible the drain could be stopped up and water is backing up in the inducer housing