Please make sure to click on General above and select the correct appliance type first.
Brand:KitchenAid Model Number:KMHC319ESS3 Main Symptom: Bottom Door Interlock assembly/Switch is not rotating the cam to contact the switch. What happens & when: Microwave Light Stays ON but microwave will not activate
Error Code (if any):none
Parts or tests already tried: W10211974 (Switch); Microwave Bottom Interlock Support WPW10156813 (Replaces Part W10824413) ; Microwave Door Latch Actuator W10197758 (Replaces Part #10824412
Photos / video link:
Hi, since you’ve already replaced the W10211974 switch, WPW10156813 interlock support, and W10197758 door latch actuator, I think you’re dealing with an alignment issue somewhere in the door latch assembly.
The light staying on and the microwave refusing to start usually means it still thinks the door is open. I would start by checking the interlock support. Make sure it’s mounted tightly and isn’t moving or flexing backward when you close the door. You can try loosening the mounting screws slightly, moving the bracket a little closer toward the door, and tightening it back down.
Also, check the door for any sagging or play in the hinges. If the door has dropped even a little, the latch hooks may not be hitting the switches correctly.
I would also double-check the new latch actuator and make sure it’s fully seated. Watch the latch and interlock mechanism while closing the door and make sure the cam is actually moving far enough to press the switch.
Since you’ve already replaced most of the parts involved, I’d definitely check the fit and alignment before replacing anything else.
Just be careful working inside a microwave. Even unplugged, the high-voltage section can hold a dangerous electrical charge, so I would stay away from that area unless you’re experienced with microwave repair. I’ve attached a tech sheet here so you can run a diagnostic check on the unit. Go through the diagnostic mode and let us know what error codes or results you find. That should help us narrow down what’s causing the issue.