it may also be just "the nature of the beast".
i bought a professionally remanufactured white last year. they're supposed to be a really good brand. heard lots of good things about them. it's gathering dust. it has 3 really annoying quirks - the worst of which is that it sounds like a tank. i'd have to wear ear plugs to use it.
a friend of mine has a brother. also as loud as a freight train.
My point being ... the noise may not indicate a malfunction. your machine may just be a loudmouth. :roll: if your husband figures out how to fix yours, please let us know. i'd love to know how to muffle my white.