This is a double oven; the top oven is convection. When the oven is turned on, there is a very loud vibrating noise. The noise continues after the oven is turned off until it has cooled. This probably started a year ago and has gotten louder.

I've searched for answers, and have seen that the cooling fan probably needs replacing, but I can't find the right part number. I see "tangential fans", but I don't know if that's the right thing. I know we'll need to take the oven out of the cabinet, and I want to have a decent idea of what I'm looking for before asking my husband to do that.

Thanks!