KD-15 Detergent Dispenser Won't Stay Closed
This was a common problem with these as they aged, if you take the outer door panel off you can see what is happening when you try closing the cover.
Some times you can fix this problem by bending the pin that holds the dispenser together, but most times we would just replace the complete dispenser.
There are probably still a lot of good used dispensers for these KD-16 and 16 DWs out there, if you have trouble finding one we can sell you a good used one for $30 + shipping.
John L.