Hi guys! Sorry I didn't post back last night, I just had surgery on Tues. so I feel asleep.
Anyway, my husband came home and what did he find? Nothing, nada, zip!
First, he plugged the blower back in and there was no noise at all. He then unplugged it and checked to make sure there was nothing in there that would've caused that racket. Then he was fooling around with the "lid" of the stove and at one point it started to vibrate some, and it sounded like the noise the stove had been making, only not nearly as loud. At this point, it seems that for some reason the top lid was just vibrating badly and making a HUGE racket. Both blowers have been running since and the stove has been quiet, no noise or vibration, just the normal sound of operation. Hope it stays that way!
Thanks for your replies and suggestions and thanks to Dave at LL! BTW, it's really good to know that you guys are here if I should need help with the stove again!