While you wait for answers, we may have found some information which could help you.
Click here for Door Stays Open
KA model KEMC378KSS01 microwave oven combo?
How can I replace the light in my microwave?
KitchenAid oven stuck on "insert probe"?
Light replacement for the microwave?
replacing light bulb in kitchenaid microwave 378KBL?
How to fix a light bulb in oven?