The blower motor sounded like it was squealing when I turned my oven on. I turned it off and back on a few minutes later and there was only a slight rattle. I am worried it will go out completely during the holiday.

I had a repair person out and he brought the blower/fan part for the top oven but apparently there is also a second blower/fan on the bottom unit as well. He can't seem to find a part number for the bottom blower/fan. He is assuming it is the lower one because it makes more noise than the top. It has not made the squealing sound since the last time.

Does this sound accurate? Is the blower/fan part different for the bottom oven than the top. I have only been able to locate one part # which is W10176670.

I would love some advice. I don't want to ruin our Thanksgiving dinner.