Replacing the control panel seems to have solved the problem of error codes and annoying beeping at all times of day and night. This was the best price I could find for a new OEM unit. It was easy to install: slide the top strip of the microwave over the door to the right to expose 3 screws you have to remove to get to the panel. Pop the panel upward to loosen it and unplug several cables to remove it entirely. Install new unit in reverse order. NOTE: wipe the end of the ribbon cable with alcohol and make sure it is fully inserted and tightly connected. Doing this on the the old panel might actually solve the problem without replacing the unit. That worked for 2 days for me before I replaced the panel, and now it has been working for a month Knock on wood!