Opened inside panel of dishwasher door. Lifted out part that needed replacement.
While reassembling, discovered that handle was the part that was actually broken.
Handles are no longer stocked.
Ordered door latch assembly with handle, about the same price, installed it and returned the other part.
Anyone having this problem with the dishwasher not opening should order the assembly with the handle. Just about the same price and saves the cost of shipping back the wrong part.
Also, watch out for the connectors on the two cables that connect to the switches on the handle. They are very tight.