Answer Hello Ken. It sounds like the interlocks may be broken. You will need to remove the outer cover off of the microwave to access the interlocks and check them out. If they are broken, you will need to order and replace the parts that are bad on them. There is a cam, spring, switches, and the housing that the unit locks into. Read More... Answered by AppliancePartsPros.com | Thursday, April 10, 2014