Glad you got it fixed, but you don't want to put a band-aid on something that "might" be created by something else. This noise can also be created by dirty filters, and also to small of a return air, and sometimes if the blower cfm's are not setup correct when the unit is installed.
Originally Posted by kalka421
“Reality is merely an illusion, albeit a very persistent one.” –Albert Einstein
“Experience is a hard teacher because she gives the test first, the lesson afterwards.”-Vernon Law