I have an older Frigidaire Gallery dishwasher. I don't have the model number handy, but I can find it if it's necessary.
A few months ago the drain pump went out and I replaced it; I knew it was out when there was standing water in the tank, so it was pretty obvious :-/
Recently I noticed that when I turn it on it's MUCH louder, making a type of humming noise that revs up and down occasionally. So something's not right.
Everything is coming out clean, so I don't think it's the circulation pump. And there's no standing water, so I don't think it's the drain pump.
Any suggestions?
Here's a 16 second video, you can hear the noise I'm talking about:
https://photos.app.goo.gl/Ha3739j24HqK4whA6