Have a 12 year old kitchenaid Superba stainless steel built in microwave. I suddenly stopped and "door' lights up on display. Door is shut hear clicking by left side may be a latch issue. How do you fix?

There is a huge capacitor inside microwaves, and that description sounds like it is starting to fail. There are smaller capacitors as well. It won't be a door switch, they work or they don't.

I had two Panasonic Commercial microwaves in a pub kitchen, one plain and one was a combination machine and both had drop down doors.

There is an power interlock inside the oven that breaks the power connection to the magnetron when the door is open. Most likely, something is stopping the switch from opening.

Check for a small plastic probe on the door that may have broken off inside the oven keeping the circuit made. Otherwise, open the oven and see is some foreign object is keeping the connection made or if the interlock needs to be cleaned out so it can function.

Page 3 of the exploded view here shows the door open parts 24510L and 250201 (or 23551B if your full model number is YKCMS135HSS).

What look like part numbers seem to be reference numbers.

For further help you will need to contact Kitchenaid Canada here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Hello there and welcome to fixya
This is a fairly common issue with microwaves
Normally the issue that you are dealing with is that the dor switch has went bad or the electrical wiring may be getting loose so what i would do is first remove the outer shell of the microwavethen get to the door switch and find the wires that are going from it to the connection poing then make a note of where the wires are connected at then remove the wires and test using ohm meter set at the lowest setting you should be getting a ol reading when the door is open then shut the door and you should show a little bit of continuity when the door is shut something like 020 or something like that however if it does not move or the numbers are really high then it should be replaced ok
I have posted a link here for you to follow on how to test it and several other parts ok http://www.ApplianceRepairLesson.com

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101 ;'

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HI, this is an indication of a failed door switch. When the switch fails, the control cannot recognize the closed door signal. Simply replacing the door latch mechanism will solve this issue.

Replace the door latch assembly, asap.

Well your gonna have to take it down a take apart the microwave more than likely. Probably have a shorted HV diode,magnetron, shorted winding in HV transformer.burnt or frayed HV wire insulation

Remove the front panel by removing the screws located on the inside of the door (note hold door inplace, since it is heavy and will fall out after screws removed). Unscrew screws located on bottom of plastic retainer (2 each) Remove tension spring. Note 2 are included right and left. Note color of spring on end, different springs for different door types, stainless, black,beige or white. Replace all in reverse order.

Sounds just like a bad door switch or door switch mount. Probably the upper one. Safety info, disassembly tips, and door switch test and replacement info are all available at our Web site. See http://tinyurl.com/yzjozk