Dishwasher started sometimes making an abnormal noise while running over the last couple months and frequency has increased from forgettable to frequent.
Happens regardless of cycle and can be regardless of time. I woke up the other morning to it when the thing had only been running 4 minutes.
I've attached a recording of the noise half way through an empty 90 minute wash with a dishwasher cleaner inside.
I've removed the drain cover and cleaned the circular filter and checked for any debris but still happen.
Moment I open the door it stops and may not come back at all that cycle or may come back frequently.