WM277B Jenn-Air Microwave Oven Combo - Instructions

Much to my horror, what was described as a simple, 15-minute replacement, took 3 days! In order to replace the oven door gasket, I had to disassemble the entire door. Every photo I saw of the gasket showed it as a flexible part: gently pull out the old one and push in the new. What I received in my order had a frame. In order to replace it, I needed to unscrew the door parts. Unfortunately, I made a few rookie errors, primarily because I kept thinking the next screw would release the gasket frame. So I neglected to keep track of the screws I removed, and I didn’t take any photos!
I must have used half a roll of masking tape to keep parts together; I did not have 5 hands! When I released everything and nestled in the frame, I had even more trouble replacing all the screws I took out. The majority of holes did not line up. So I just did the best I could, put in as many screws as I could. But after three days of working, I finally finished. It all held together, and the door did what it was designed to do. Really a repair horror. And I am not an incompetent novice!

Using exploded view and previous customers' comments, I disassembled the door. It was primarily a matter of finding all the screws. I recommend taking the door off first (I didn't), but watch your fingers. The hinges have very, very strong springs and you can hurt your or your helper's fingers if you're not prepared. The hardest part was keeping all the insulation in place while your're installing the assembly. I also replaced the gasket. That takes four hands, two to hold the gasket in place and two to reinstall the window assembly. To put the door back on the hinges, I pulled them out from the door at a 45-degree angle (takes some effort), put screwdrivers through holes in the hinges, and guided (with help) the door back on.

Removed the approximatly 10 screws that hold on both the upper and lower pieces of sheet metal that cover the back of the oven. Removed the screw holding in the temp sensor. Unplugged and removed the old sensor. Plugged in and installed the new sensor (using one of the included adapter wires supplied with the sensor). Put the 2 pieces of sheet metal back on and plugged in the oven.

First I removed the four torx screws that hold the element in place. I then pulled the element out about 3 inches and disconnected the two wires.
Then I installed the new element in reverse order. Recycled the cardboard box and the old element.

Removed two screws near the hinges and removed door and laid it on counter.
As we removed screws from each part of the door, we stacked the parts in the order removed. Tossed screws into a shallow pan for safekeeping.
Removed old seal and put new one in its place.
Reassembled parts in reverse order as I cleaned each one.
Put door back on the hinges and the job was done.
Would have been a much quicker job, but door had 24 years of dribbles down in it, and needed a good cleaning.

We ordered a new element also, as the old one had blown up. Very gratifying to know there were still parts for my favorite old range.

The video indicating •unscrew old sensor, •pull wiring, •unplug old sensor, and •plug in replacement was good until I pulled the old one and saw wire nuts behind the small square hole! After some research, I learned that the nuts COULD come through that small hole with use of needle nose pliers. One of the wire nuts had the edges pinched off (chipped) in the process. Then I learned about ceramic wire nuts, which I'd never previously encountered. Very important if you don't want to melt your nuts! I cut and stripped the end of a disconnect plug to the stove wiring and now I have a plug in place; which, hopefully, I'll never need to use.

unplugged oven. removed 2 screws that hold the sensor in place, then removed the dozen or so screws that hold on the rear panel, unplugged sensor and fed wire through insulation. identified and installed correct harness adapter then fed new wire and connecter through insulation and connected to adapter. installed sensor retaining screws.plugged oven back in and tested function.no dice. unplugged oven once again. removed oven control panel and upon inspection of printed circuit board discovered 3 solder joints had failed. dang. resoldered failed joints and also sweetened up a few others that looked suspect. reinstalled controller, replaced all retaining hardware, and plugged in the oven. tah-dah!! works like a charm now. moral of the story is check the pc board first and save $50 for unneeded pats!!! or buy the controller from parts direct for $260ish. btw a roll of solder and soldering iron from an auto parts store cost around $10, learned to solder on you-tube $0. amazing all the home appliances yo can fix if you're not afraid to take a few screws out and poke around a bit. CHEERS!

First removed the 4 screws on top of the display panel pulled the panel off to access the circuit board, then removed the( 3) wire / pin connections and (1) flat wire, then removed the (4) nuts holding the circuit board in place,removed the old circuit board (Timer) and installed the new circuit board,connected the (3) wire / pin connections and flat wire, reinstalled the display panel......voila,back in business. Probably should of tripped the circuit breaker but did not get shocked.
The hard part was in determining that the Electronic Timer (circuit board) needed replacing.

First I called a repairman and left a message. That was 3 weeks ago. So, I 'googled' the error message and determined what part I thought I needed. Ordered the part on Wednesday evening and it was there when I got home from work on Friday. I unpacked the part, got a phillips screwdriver and then watched the repair video on your website. About 20 minutes later I pushed my stove back in place and the flashing said 'set time'. Then I checked both ovens, and have since used both, and everything works!!

Oven sensor replacement was easy. Thermistor was installed in less than 15 minutes. After installation STILL had "F3" error message. Harness was ok, "Clock" or ECU needed to be replaced. "Computer" is obsolete, no spares available, some companies will rebuilt for $400+. Since the stove was going to the landfill I had nothing to lose by taking the "Clock" apart. It has one chip that is probably the power supply and control chip, another chip is an EEPROM with 128 bytes of storage and the last is a darlington chip that controls the relays. Cleaned up everything that looked like it needed cleaning with alcohol. When I reassembled the unit the pins for the thermistor harness felt loose, so I took it apart, again, and found cold solder joints on all four pins. It must have been there all along but plugging and unplugging the harness finally broke out the solder so I could see it. Soldered the pins back in and now it all works. It's worth a try if you're getting the "F3" message. If the relays on your stove aren't working it would be a good idea to replace the darlington chip. Good luck.

I switched the oven sensor easily enough, but it did not remedy the problem, so we are in the process of replacing the oven since it's about 20 yrs. old.

Move stove out from wall. Unplug from power. Removed four screws from the left side of the back (the side the light socket is on. Reach in and unplug the two wires on the back of the bulb socket assembly. Inside the oven, remove the bulb cover and the two screws holding the socket assembly. Remove assembly. Install bulb in new assembly, reattach the assembly to the oven back, reinstall the bulb cover. On the back of the stove, replug the two wires and replace the screws on the stove's back cover. Replug the unit to power and move back into position.
Sounds harder than it is. The worst part is reaching inside the oven to get at those bits.

First thing
disconnect from electricity
Remove the back cover by unscrewing its fixing screws
Using philips screw driver, To remove the scocket assembly, pull the tow electric wires from the socket, using a fine plier.
Open the oven door and unlock the glass cover and remove it.
Remove the 2 screws fixjing the socket from inside the oven.
Now the socket is ready to be disassembled by just pushing the clips with tow fingers.
Replace the socket and do same steps in reverse way.
insert the lamp, and the glass cover, connect the electricity and you are done.

Removed the ice brucket,
Removed the light shield by releasing one screw using a nutdriver.
Replacing the bulb and reinstalled the light shield.

Your web site is one of the best and most helpfull service sites I ever used. Just wish that in the future you will ship parts overseas.

The heating element is held in place by two phillips screws which were rusted fairly tight, visible at the back of the oven. I tapped my screwdriver with a hammer as I loosened them. (I would have used liquid wrench if the hammer did not work) Two wires are fastened to the element by two clips that you can slide off by hand. Slip the wires off the old element and onto the new element and install the two screws and you are done.