Part Location Diagram of WPR9800486 Whirlpool Black Sleeve Diode
See part 111 in the diagram
( Grid squares measure 1x1 inch )
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Black Sleeve Diode

 Fits your MO1450WA!
$40.04
  On Order
 Fits your MO1450WA!
PartSelect Number PS11747959
Manufacturer Part Number WPR9800486
Manufactured by Whirlpool
Troubleshooting
This part fixes the following symptoms:
No heat
This part works with the following products:
Microwave, Microwave Oven Combo.
This part works with the following products:
Amana, Maytag, Jenn-Air, KitchenAid.
Part# WPR9800486 replaces these:
AP6014695, 14200283, 56001030, DE91-70063A, R0131275, R9800486, R9900303, W10160548, W10269016, WPW10269016
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Customer Repair Stories
 Average Repair Rating: 3.3 / 5.0, 6 reviews. What's this?
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Sparks and loud hum from oven
1. I went to the internet to find the service manual for the Maytag microwave.
2. I opened up the oven and started measuring the resistance of the diode, capacitor, transformer, and magnetron between terminals and then to ground. The transformer and magnetron were well within the resistance limits. The diode was shorted in both directions(+-). The capacitor was fully open in both directions -- high resistance.
3. I ordered the 2 parts, installed them, and ran the oven. Worked perfect first time.
4. Reinstalled oven and worked ever since (1 week so far).
5. The secret was that the transformer had a load hum. I figured the transformer was OK. The magnetron had no short between filaments and ground to filaments. The only two left were the diode and capacitor. The first two are about $200 -- almost the value of a new microwave. The $70 repair was well worth it. If the first two were still bad, then tempted to buy a new oven.
Other Parts Used:
Capacitor
  • Guy from Bellingham, MA
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Pliers, Screw drivers
113 of 170 people found this instruction helpful.
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no heat
I looked up the #1 reason for no heat for my microwave on the site , and using my model number found that 92% of the time it was the Black Sleeve Diode. Ordered the $15 part, and installed it within 30 minutes. Most of the time was used for removing the built in microwave and removing the cover. Replaced the diode by finding it on the diagram that I printed from this site (free). Very relieved that we don't need to have our custom cabinetry re-sized to accommodate a new microwave. Thank you!
Other Parts Used:
  • Lisa from PARADISE, PA
  • Difficulty Level:
    Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Pliers, Screw drivers
28 of 28 people found this instruction helpful.
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Microwave not heating
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.
Other Parts Used:
Ceramic Fuse - 20 amp
  • Tommy from FORT VALLEY, GA
  • Difficulty Level:
    Easy
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Pliers, Screw drivers
6 of 6 people found this instruction helpful.
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No heat
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.
Other Parts Used:
  • John from SANTA CLARA, CA
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Screw drivers
4 of 4 people found this instruction helpful.
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Microwave oven ran but stopped heating
I had to unmount the over-the-range microwave oven to be able to gain access to the interior of the oven. Complicating removal (and re-installation) was the fact that there is a "pot-filler" faucet installed directly underneath the oven. In retrospect, I should've removed the faucet before doing the repair, but "c'est la vie."

After I got the microwave down, removing the case was also "interesting." I get bonus points for the fact that the previous owner must've had to replace the same diode before - and then re-assembled the microwave case incorrectly - thereby adding to the confusion (BTW, the service manual that I found online said nothing about how to remove the oven's case).

To remove the case, undo all the screws holding it on, and then rotate the case upwards from the back while also pulling the case backwards. There are crimped folds on the inside of the case that mate with the back edges of the front of the oven's chassis, and these folds have to be unclipped from the chassis in order to remove the case.

Replacing the diode itself was the easiest part of the job. The two connectors on the diode are of different types, making it impossible to install the diode with the wrong polarity.

BTW, the diode that had failed was not an OEM diode; I suspect it was a generic component that had been installed by a repairman sometime between 2004-2008 (when our home's original owners still owned the home). On the other hand, the new diode from PartSelect is an OEM part (it came packaged in a sealed Whirlpool bag).

The fact that the oven had stopped heating indicated that it was either the high-voltage diode or the magnetron that had failed. Since a replacement diode costs ~ 1/10th as much as a replacement magnetron, I figured it made sense to replace the cheaper part first. Fortunately, this fixed the problem.

One last thing: I tried testing both the old and new diodes for conductivity and polarity using my volt-ohm meter (VOM), but I was unable to get either diode to "turn on," even though my VOM is powered by a 9-v battery, and I used the 2-Mohm range setting. I guess the test voltage of my el-cheapo VOM isn't high enough to exceed the diode's threshold voltage, (even though I have successfully used this same VOM to test low-voltage diodes).
Other Parts Used:
  • Forrest from Eugene, OR
  • Difficulty Level:
    Difficult
  • Total Repair Time:
    1- 2 hours
  • Tools:
    Screw drivers
2 of 2 people found this instruction helpful.
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microwave not heating
removed a dozen screws-discarded large cap-replaced diode-replaced a dozen screws(took longer to replace them than remove for some unknown reason). Microwave now works(wife happy).
Other Parts Used:
  • Mark from GREENSBURG, PA
  • Difficulty Level:
    Easy
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Pliers, Screw drivers
2 of 2 people found this instruction helpful.
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  • 1
Questions and Answers

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3 questions answered by our experts.
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Terry
November 17, 2017
Where's is it located, how do I replace it ? Can't seem to find any instructions, thank you
For model number MMV5000BAW
PartSelect logo
Hi Terry, Thank you for the question. The Diode is located next to the capacitor in behind the controls. You will need to remove the cabinet from the microwave to access the Diode.The diode is held in by 2 screws. Be sure to disconnect the power source from the microwave.The microwave can hold a charge even when unplugged so use caution. You can discharge the capacitor,Do this by touching an insulated-handled screw driver to one terminal, then slide it toward the other terminal until it makes contact and hold it there for a few seconds.Repeat the procedure to create a short between each capacitor terminal and chassis ground.Hope this helps!

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Steven
November 20, 2018
My Amana microwave makes a loud hum and doesn't heat.
For model number ACO1560AB
PartSelect logo
Hi Steven, thank you for your question. There are a couple of parts that you should take a look at. The first part to check would be your diode. If that part is working correctly then it may be your magnetron that is the issue. I hope that helps. Good luck with your repair.

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Related Parts:
Todd
July 26, 2019
Unit operates but does not cook and I also get the smell of an electrical fire. If the problem is the black sleeve diode would it have that smell?
For model number MVH250E
PartSelect logo
Hello Todd, Thank you for the question. I suggest testing the diode with a multi meter to check for continuity. Hope this helps!

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Related Parts
Model Cross Reference
This part works with the following models:
PartSelect Number: PS11747959
Manufacturer Part Number: WPR9800486
Brand
Model Number
Description
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ACM1580AC
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