KEMC378HWH2 KitchenAid Microwave Oven Combo - Instructions

My oven (late 90's/early 2000's model) didn't have the flip-down hinge locks shown in the video. It seems Whirlpool/Kitchenaid changed the hinges even though they didn't change the model number of the oven. With my style hinges, you have to put Allen wrenches or bent nails in the holes just behind the hinge pins. Then close the door almost all the way and lift it out to separate the hinges. Spring force holds the nails in tightly until you replace the door. This video was very helpful:
https://www.youtube.com/watch?v=p7oRZdIN6m0

Also, my door had 3 different kinds of sheet metal screws. Two of them have similar heads but different threads. Keep track of which is which for when you put everything back together.

we live in Venzuela the ordered windows come to us via a forwarder in the US, one glass (the outer glass) still has to arrive. Very pleased with the service of PartSelect, one glass was in stock, the inner glass had to be ordered with the manufacturer. This glass is on its way and will arrive here in Venezuela by the end of May. As I have to travel to Europe next week, I will install both glasses upon my return somewhere in August next. I will sure inform you about the repair which will be done by myself.
regards,
Titus

Thanks to video provided by PartSelect the repair was fast and easy. My second experience with an appliance repair with parts and video from PartSelect. I am a happy customer.

I watched the video on the product page and followed it step by step. Not difficult at all.

Ordered a new motor. Removed the outside trim of the oven-microwave combo. 2 screws at the bottom of the trim. Removed the screws that held the combination micro and oven unit in place. Removed the top and bottom black plastic grill of the microwave. 3 screws each. Pulled the entire unit out about 1 inch exposing the screws at each side of the microwave that hold it in place.
Snapped off the top control panel which exposed the wiring connecting the control panel.
Unplugged a couple of wire harness units to free the control panel.
Be sure to label the units to know which goes where during reassembly.
Remove the microwave unit from the housing and place it on its side.
Remove the metal plate that houses the motor. 4 screws hold the motor in place. Disconnect the 2 wires from the old motor and you are ready to install the new motor. Be sure to TURN OFF THE POWER to the unit at the breaker box and remove the turntable from inside the microwave.

Pulled the stove out, unscrewed the back and plugged the new thermostat in. Screwed the back back on

Removed the door from oven removed screws from door and replaced the old hinges with new ones perfect match

Watched the repair video and started the project. Ran into a problem when trying to remove the interior panel off the door to reach the broken interior glass. On this model Kitchen Aid there is another section that is screwed in holding the exterior glass pieces in place. It prevents the interior panel from coming off the front of the oven door. So we had to flip over the door and unscrew the glass retaining bars to get the interior panel off and reach the glass. This allows the entire door to come apart in pieces so you have to carefully line up everything to re-assemble the door. Part of the issue with this is some of the retaining screws are not very long so you have to press the pieces back together to make sure the screw will catch in the original hole. We had to do this twice to ensure the interior door glass was laying flush on its mounts. A bit fiddly for sure, and if I was working alone it may not have been successful. But at least we know how the door is put together!

Several professional appliance repair people told me I had to get a new oven (double, no less!) because "they don't make that hinge anymore." That would have been a $4-5K investment to replace two ovens that both work fine. I'm not generally a DIY person, but was inspired by a FB page I follow called "Handy Women." I got the model number out of my oven, googled "replacement hinge for ____," and found it on this site right away. $120 and about 1 week later I had my hinges. I found this video in the comments on this website that shows (without narration) exactly how to change the hinges.
https://www.youtube.com/watch?v=XzQuU2gZYhk
The only mistake I made that cost me some time had to do with the little pins you have to put into the hinge to remove and replace the oven door. They were missing from the old hinges, and it didn't occur to me to use the ones that were in the new hinges (hadn't unboxed when I started.) I used threaded bolts that were the right diameter and length. They slid right in, but then when I went to take them out, it was an ordeal with WD-40 and an Allen wrench. Then it still didn't occur to me to look at the new ones, so I went to the hardware store and bought two more things the right size without threads. Of course when I took the new hinges out of the boxes they already had the little pins in them. Annoying and time consuming rookie mistake, but my oven door now closes just fine, and I'm getting a ridiculous amount of satisfaction from my little repair job!

1. Disconnect AC power 2. Remove back with several sheet metal screws. 3. Remove wires from Limit Thermostat. 4. Check Limit Thermostat continuity -- if open then Limit Thermostat is faulty. 5. Remove Limit Thermostat with two screws. 6. Install new thermostat

Removed locking device

I took the new tray out of the box and placed it in the microwave oven.. No tools needed.

I looked up the problem and determined I needed to replace the limit switch which is inside the back panel. As a 78 year old woman who isn't afraid to tackle these problems I found this easier than most. Just be sure to disconnect the electrical connection if you don't have long enough length to pull oven from the wall cabinet. I won't put any sheet pans in the oven next time I self clean it.

1) Removed the trim pieces (2 screws). 2) removed the 2 screws holding the oven in the wall. 3) Slid the oven out of the wall cabinet 4) removed the back panel of the oven ( 10 screws. 5.) removed the old thermostat (2 nuts) 6.). Installed the new thermostat and reversed steps 4-1

Installed new part