GSC278PJB1 Whirlpool Microwave Oven Combo - Instructions

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.

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!

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

Unplugged old element unit and plugged in new element. Took two needle nose pliers and a flexible body. Took about 5 minutes. Works fine. Anybody can do it. Make sure power is off at the box.

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

First remove the side trimmings by opening the oven door and taking out the two screws near the bottom. Remove the bottom trim by removing the two screws now exposed. Here's the hard part .. The outer glass is held by 4 screws 2 at the top and 2 through U brackets at the bottom. You must remove the 2 bottom ones first and then VERY carefully, whilst supporting the glass remove the 2 top ones and then gently pull from the bottom to release the glass at the top and pull away. The rest is straightforward. There are 4 glass pieces to remove, make sure you clean the finger marks off as you replace them. I would suggest 2 people to replace the final outer glass 'to be safe"

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!

We had to remove screws from the vent covers above and below the microwave, then there were 2 screws (one on each side) that attached the microwave to the oven. Once all of the screws were removed we had to pull the microwave out. Then we pulled the light cord out, removed the burnt out light and installed the new one. Then reversed the steps.

Removed the small metal panel covering the main power terminal in back of the electric range. Removed the nuts holding the red, white and black electrical wires from the range using the appropriate socket (there will be two nuts on each bolt end). Removed the two screws holding the main power terminal block with appropriate screw driver. Connect the new main power terminal block to the range using the two screws. Reconnect the red, black and white electrical wires coming from the range using one nut for each wire. IMPORTANT: do no over tighten the nuts because the bolts could snap. Reconnect the pigtail and secure the small metal panel covering the main power panel.

We followed the instructions given by Parts Service. The only problem we had (Whirlpool left two screws out of spacer bracket and it fell out requiring further removable of inner glass to replace spacer. Process took about twenty minutes.

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.

Ordering the part online was easy. It arrived in a timely manner. I found a terrific video online showing how to install the terminal. It was so easy. Thank you for the great instructional video.

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

Replaced the glass tray

After we put the latch pins in, the door was easily lifted off. We placed the door on the table and unscrewed the trim pieces. The new trim pieces went into place after we cleaned the door. We slipped the door back on the oven and removed the hinge pins.