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Customer Questions and Answers for Magnetron (High-Voltage Microwave Tube) by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM17946882
Manufacturer Part Number: W10754299

This magnetron is the microwave's high-voltage tube that generates the microwaves responsible for heating food. Use it as a direct replacement when your microwave powers on but no longer heats properly. What it does:

  • Generates the microwave energy that heats and cooks food inside the oven cavity.
  • A failing magnetron commonly causes the oven to run but not heat; other signs can include weak or uneven heating.
  • Can produce unusual humming, arcing or sparking inside the cavity, or a burning smell when failing.
  • Works as part of the high-voltage circuit; other components affect overall function.
What's included: One magnetron. Install notes:
  • Disconnect power and unplug the appliance before servicing; the high-voltage capacitor must be safely discharged.
  • Handle the magnetron carefully by the mounting flange—avoid touching the ceramic antenna or terminals.
  • Verify exact part number compatibility with your model before ordering; some repairs require replacing other high-voltage components.

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Questions & Answers

For Whirlpool Magnetron (High-Voltage Microwave Tube) (Part Number: OEM17946882)

1 Answer

Hello Steven. Yes, you will need to discharge the capacitor before doing the repair. Make sure the power is disconnected before removing the outer cover on the microwave.

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1 Answer

Hello MikeZ. You can test the magnetron. It should read less than 1 ohm and have no broken magnets. If bad, you need to replace the magnetron and the diode on the unit.

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1 Answer

Hello Beth. I don't see why you couldn't do it yourself. As long as you pay attention to the dis-assembly and can re-assemble as it came apart. It really isn't that hard to change the magnetron W10754299. The hardest thing about it is if it's an over-the-range microwave. Removal and re-installation is the worst part of the job. Just put a few thick towels on the range and remember that the over-the-range microwave removal and re-installation is considered a two man job to prevent back injuries. Hope this was helpful and have a great day!

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1 Answer

Hello Ted. The model number you provided is not working. It sounds like you may need to replace the magnetron and the diode. Look for cracks and burnt spots in the magnets and the tip of the magnetron. The diode should only read on a meter in one direction. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. Hope this helps. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html

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