JMW8530DAB Jenn-Air Microwave Oven Combo - Instructions

Removed 4 small star head screws from back of microwave, lifted body off, removed blown fuse and replaced with new one (found where cord enters). This model is stainless inside and out and I like it a lot. It is also sold by Daewoo and a few other manufacturers.

Had a technician from Home Advisor to check the problem out with my Whirlpool Double oven(1 1/2 old). Paid $60 to find the problem. According to the technician problem was control board and cost of labor and parts $465.00
Jumped on Part Select website, placed a question with my stove problem through the chat. Immediately they answered my question and told me the problem was the Terminal Block. Cost of part and shipping $25.00. Replaced it myself and everything works fine.
Thank you, Thank you Part Select for your help and honesty.

Sincerely
Peter from Maryland

Replaced diode works great. your website said 92% diode was problem and it worked. Order fuse in case old was blown did not have to use it.

We have a Jenn-Air microwave and oven combination that is installed as a "stack" in a cabinet. The light bulb had burned out, and I read some of the posts on the partselect.com site about how others performed this replacement; ours was a bit different.
To replace the microwave light bulb, we had to remove the entire microwave and oven stack from the cabinet. There were four anchor screws on the sides (two on each side) of the microwave that were driven in perpendicular to the face of the microwave. There were four more screws that were on the sides of the oven that could be accessed once the oven door was open.
With those anchor screws removed, we had to carefully pull the entire microwave / oven stack from the cabinet to reach the top cover of the microwave. We used an old wooden crate to hold the front of the oven and left the back of the oven resting in the cabinet enclosure. This gave enough room to access the screws on the top cover of the microwave, without having to lift the entire stack down to the floor.
At this point, I could unplug the microwave power cord, which was plugged in to a socket built into the top of the conventional oven part of the stack.
The top cover of the microwave was attached with regular Phillips head screws, so those were easy to remove. Several other instructions indicated I would need a torx or star drive screwdriver, but I did not.
Once the screws were removed from the top cover of the microwave, the cover can slide rearward to be removed. However, there are two metal strips that run vertically along the sides of the microwave and at the top of the microwave, these bends over at a right angle over the top of the microwave. The top cover has tabs that sticks up vertically from the cover, so that the bent strips prevents the cover tabs from passing as the cover is slid backwards. The vertical strips have several screws connecting it to the body of the microwave. On one of the vertical strips, I removed the two of these screws closest to the top of the microwave. Then, I gently pushed a wood chisel, because of the bevel angle, between the vertical metal strip and the microwave body. This moved the bent-over portion of the vertical strip far enough away from the microwave that the tab on the top cover cleared the strip, and I could then remove the top cover.
With the top cover removed, I could see the old light bulb. It is attached with a push-in electrical connection that was easily pulled off. One Phillips head screwdriver held the old bulb in place towards the rear of the microwave. Towards the front of the microwave, a small plastic post holds the front of the bulb. I removed the screw and pulled out the old bulb.
The new bulb fits easily into the same plastic post and screw connection. However, the new bulbs connector prongs are bent at a 90 degree angle to the original bulb. Instead of sticking straight out from the microwave, which was how the old bulb was configured, the new bulb prongs pointed to the right side of the microwave (as viewed from the front). Fortunately, the wiring harness in the microwave that connects to the light bulb had a zip tie that was loose enough to get enough slack for the push-in connector to reach the new bulb's prongs.
After the bulb was in, I reversed the steps described above, making sure to leave the chisel in place until the top cover had been secured back in place. Once the chisel was removed from the vertical metal strip, the bent portion again would prevent easy removal of the top cover. I made sure to plug the microwave power cord back into the outlet on the conventional oven, then we slid the entire unit back into the cabinet enclosure, and I put the anchor screws back to hold the stack into the cabinet.
Three of us worked on this - mostly to help pull the stack out of the cabinet and to help steady it while the front was resting on the wood crate. This is not a single-person job. It was not terribly difficult, but the number of steps is very tedious. I found a helpful YouTube video "How to uninstall/install a Jenn-Air JMC8127DD/JMC8130DD Microwave Oven" posted by Ali The Handy Man. Being able to see that the microwave and oven stack was connected by a "bridge" (as Ali calls it) was a major help in tackling this.
After this, we suspect that Jenn-Air must have not wanted any repairs to their appliances. As I said above, this repair to replace a light bulb seemed unnecessarily tedious.

I mistakenly thought I had to remove the microwave to get to the back, not so. I would have had access to what I needed to unscrew; but I have to admit the hassle of taking it down and putting it back equals having to work on it attached to the shelf-your call on how you do this. I unscrewed the front top to remove the vent piece that is across the top front of the microwave. This will reveal the control panel screw. (While you have the vent removed you might want to clean the vent and the exposed filter.) carefully lift and pull out control panel. I unplugged a piece as the wires were tied tight. It will not completely detach, so carefully tip it back from exposed insides. The fuse is not clear but white with silver ends so look in upper right for it. I popped it out and replaced it. Replugged the wired part to cover and carefully fit tabs in and slide down to secre. Replace screw, replace vent piece and secure screws on top of microwave. I plugged it in to test before putting it back above my stove.

This was an easy repair and the parts fit perfectly. I removed the oven door by unlatching it and sliding it off. I then used a screwdriver to take the back cover off, and took the old hinges off with the screwdriver and replaced them with the two new ones that I ordered. I replaced the back of the door panel and put the screws back in and WA LA - just slid the door back on and tightened the latches.

remove outer cover of microwave, (special recessed star bit required) change bulb, unplug and remove 1 phillips screw.

I took the oven door apart, pulled out the broken fragments of glass and replaced it with the new glass. I should have taken notes as I took the door apart because it was a bit tricky to remember how all the pieces fit back together.

I was very impressed with how quickly the parts were shipped and the quality of the packing materials to protect the glass as it was shipped.

Removed both oven doors to remove from the wall. Pulled the oven out of the wall. Removed all the sheet metal backing on the back of oven top and bottom. Removed the electrical,connections to the fan. Removed attach,net screws and pulled the fan. A bit of a pain had to twist pull and bend the metal bracket. Replacement fan had to be reversed came apart easily and reversed then reassembled. Fit in easily and attached electrical connections. Then reattached all the sheet metal backing bottom then top. Put oven back in wall then secured in place. Re installed the doors and applied power. Oven worked great as soon as we tested it. Great fix, works better than new!

Repair was very simple. Took the door apart in layers, replaced the glass and put everything else back. it took longer to clean the stove than it did to actually take it apart and put it back together. guess i didnt need to be that much of a clean freak!

If doing this for the first time, it's harder to replace than described by others.

Start by removing the oven door. Reach in to unscrew the two screws that hold the sensor in place on the back wall of the oven. I was working on the upper oven of a double wall oven and found it more comfortable to sit on a tall bar stool while working. Pull the sensor partially out and you will see the connector wire running through the sensor opening. The sensor connector plug is too deep into the oven to reach with fingers or any tool. Next unscrew the 6" round heat circulator fan just below the sensor on the back wall of the oven. Pull the fan partially out and you will see the plug for the temp sensor directly behind. You may have to push some of the insulation of out of way. Unplug the old sensor and pull it back out directly through the sensor opening. Take the new sensor and thread it in through the opening and plug it in. Reinstall the circulator fan and then screw the new sensor in place. This should complete the temp sensor replacement.

Removed case,
Discharged HV capacitor and removed cooling fan.
Unscrewed ground end of HV diode and unplugged from HV capacitor.
Installed new diode by reversing the order. In my case, the problem was the magnetron was bad, so I replaced it as well.

So, the F9 error indicates a electrical power issue. First I pulled the oven out and verified I had 240 volts at my outlet.

Then I removed the fire panel over the terminal block and the issue was apparent. The nuts on the terminal block were corroded. This had cause the resistance in the connection to raise and burn up the wire to my oven plug at the terminal block.

I removed the whole back panel and everything else seemed OK visually.

1. I go new connectors for the oven plug, stripped the wires, and crimped on the new connectors.

2. The terminal block DOES NOT come with the nuts to connect the wire to the terminal block. Mine were so corroded they had to be replaced. So I went and purchased the correct ones and installed the terminal block and reconnected all the wires.

3. I applied some dielectric grease to the connections through out the process of reinstalling to prevent it from happening in the future.

Removed 6 screws from bottom cover and 2 from motor cover. Unplugged motor and installed new motor. Plugged in new, Installed cover. Done

pull oven, remove back pannel and unplug and remove high limit switch. Repair was the reverse of removal.