Kenmore 66513543N411 - dishwasher is "groaning"

[reezekeys]

Hi, I’m back (again!) with another dishwasher issue. I really appreciate the help I’ve gotten so far. My last repair (a leaky spray arm) is holding up, now there’s something new; a “groaning” noise that happens at regular intervals during the cycle. I used my amateur videographer skills to make a short (:22) video where I accentuated the audio to make it easier to hear (you won’t miss it - happens at around :11). If this noise sounds familiar to anyone I’d appreciate a heads up. I’m not sure if this might be related, but we have hard water here and my wife is anti-rinse aid. I try to descale about once every 4 - 6 weeks though. So far, other than the noise the dishwasher is functioning normally.

As always, thanks for any advice! Here’s the (unlisted) youtube link:

https://youtu.be/aGtl4Z3bgIw

[reezekeys]

Interesting that I am looking at some repair stories about both the diverter motor and the circulation pump and I see mentions of either leaks, or water just not reaching any dishes - nothing about this noise. As usual with me, it's looking like a fishing expedition to figure this out. Hoping someone has heard this exact noise and can straighten me out! The youtubes seem to imply that replacing either of these two parts is not a major job. Actually I'm pretty sure I had the diverter motor out when I did the seal (that was yet another repair, before the spray arm!).