Model #KB6024MK, this is a Sharp microwave drawer that would open and close properly, but when started would not heat. These drawer units will sometimes close properly, but not enough to actuate the interlock switches to power the magnetron. A quick test is to turn the unit on and press in on the drawer handle while it is running. If you start hearing the low hum of the magnetron, the interlock assembly is out of adjustment. Removed the left side panel and gained access to the switch mounts to do a quick adjustment so when the drawer closes, the switches close properly to allow operation. It may take more than one adjustment to make it work properly so test it several times before reinstalling the side panel. It should work properly when the drawer auto closes and should not require any manual manipulation from the user.