How to Troubleshoot & Replace Ge AP5986221 / WB02X21662 Latch Board

Did search for possible answers. Found probable answer and how to fix on YouTube. Searched for parts. Removed microwave from enclosure, removed and tested parts for continuity, then ordered parts. Received parts, installed, then re-installed the microwave. 

Removed the top/sides cover(needs torx drivver). Tested the switch with a multimeter per instructions found in an envelope that was under the cover. Replaced bottom switch on the black plastic frame(latch board), the principal interlock switch. The latch board with 3 switches on it is just beyond the control panel as you look into the right side of the unit, Remove the two screws at the top and bottom of the latch board. With a flashlight look under the bottom switch and you will see a plastic tab that looks like the blade end of a screwdriver seen head-on. This tab is on a flexible arm of the latch board and must be pushed back enough to allow the switch to be rotated counter-clockwise, releasing it from the other plastic parts that hold it in place. After the tab is pushed back, which I did with a screwdriver, the switch rotates around a plastic pin on the latch board that is in a hole in the upper right of the switch. Pull the switch off of that pin to remove it. Place the new switch on the pin, push the tab back, and rotate the switch clockwise so it fits into the parts that hold it. When replacing the two screws that hold the latch board there is some play in its position. Make sure it is positioned so the catches on the door are fully seated down against the latch board when the door is closed. What took the most time was figuring out how to remove the bad switch and learning that the latch board had to be positioned properly when it was re-installed. 

Replaced all 3 interlock switches and the latch board. I ordered the latch board because some people said theirs broke when removing it; mine did. Glad I ordered one. My biggest difficulty was finding information on how to access the switches. To get to them, had to remove the microwave from the built-in cabinet enclosure, then remove the microwave housing cover, then 2 screws to loosen the control panel from the inside. The switches were very tight in the latch board - removing the latch board was necessary to get a grip on the 3 switches. Called your tech support to get some help because after installing new switches the oven still would not work properly. Wendee was very helpful - emailed the tech sheet. Figured out the latch board needed a tweak to get into proper position. Problem solved. Oven now works. 

I watched a few YouTube videos to determine the problem, got online and found the part I needed, ordered it and it arrive the next day. I replaced the part and it worked like a charm. It probably took me about 45 minutes to put it in but that’s only because I didn’t take a picture of it before I December disassembled the parts. I’m a single woman having lost my husband this past yearAnd even though I’m pretty handy around tools, I’ve never tackled anything like this before. 

Still troubleshooting, received help from chat with your pros, which helped a lot, fixed before with latch board and microswitches and monitor switch, but still figuring out why the fuse blew in front of the profile convection microwave, but thanks for your one-day delivery service 

Determined via internet search that problem was most likely a door switch. Accesses the switches (for this unit needed to take off the cover and release the control panel, non-trivial). In taking the switches out of the board latch - cracked it. Plastic was very brittle, no matter how careful I was did not seem any way to avoid this. Ordered new switch for lowest switch (continuity checked, but seemed on/off switch response wasn't good). Replaced lower switch and new board latch (better quality latch, some flex allowed for replacement of switches without cracking it). Also, heated up the board latch when putting switches in a little to ensure some flex. Put it all back together and all is working.