Kenmore Ultra Wash Dishwasher: Lock On Button...

Question

Hello, I own a Kenmore Ultra Wash Dishwasher model 665. The Lock On light continues to flash red. I reviewed the manual following the instructions of the NO HEAT DRY 'lock button' to hold for 4 seconds to Unlock but this has not worked. The Lock On Light continues to flash red and I'm unable to start a wash cycle. I checked the fuse and all is good. Can anyone advise if your dishwasher has had this issue and how you resolved? Thank you!