Blinking lights - heating element ok

This is a Kitchenaide with the stainless steel tub. I get the blinking light issue after about 15 minutes from starting the cycle. The heating element checks out ok with about 19ohms. We were using it for a while by dumping about a cup of hot water in it after about 12 minutes - this would let it continue the cycle because it sensed the temp difference. But the heating element was cold when I would open the door to put the hot water in. The door appears to be latching ok - very sturdy installation. Not sure if I can test that continuity or not. Not sure what else to test at this point. Should I get into the control panel and test for anything? Any thoughts?

thanks