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Customer Questions and Answers for High-Voltage Diode (Microwave) by Ge

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Manufacturer Part
4.89 (64)
By: Ge
Part Number: OEM6079164
Manufacturer Part Number: WB27X1160

This high-voltage rectifier diode is used in the microwave's high-voltage circuit. It converts AC to DC so the magnetron can produce heat. A failed diode can cause no heat, loud humming, or a blown fuse when starting. What it does:

  • Rectifies high-voltage AC to DC to power the magnetron
  • Blocks reverse voltage in the HV circuit
  • Common failure symptoms can include: runs but doesn't heat; loud hum then shutdown; line fuse blows at startup
What's included:
  • 1 high-voltage diode
Install notes:
  • Unplug the microwave and properly discharge the high-voltage capacitor before servicing—dangerous voltage can remain even when unplugged
  • Match diode orientation/polarity to the original and ensure a solid chassis ground connection where used
  • Route leads and reinstall any clamps/insulators exactly as found; keep wiring clear of sharp edges and hot components
  • If the original diode failed, inspect the HV capacitor and transformer for related issues before reassembly

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Questions & Answers

For Ge High-Voltage Diode (Microwave) (Part Number: OEM6079164)

1 Answer

Mike, At diode blowing that rapidly would most likely be caused by a faulty capacitor.

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Frank for Model Number JVM1190WY01

The microwave turns on and counts down but the items are not heated. I checked the microswitches and thermo fuses and they are all good. I'm going to check the HV diode but just read an email from someone who tested a magnetron as OK, but diode as bad. They replaced the diode only to find the uwave still not heating. Do I need to check the Xfrmr, magnetron, diode, and cap comprehensively before just replacing a diode if that is bad? What besides < 1ohm resistance on the magnetron is necessary to test it?

1 Answer

Frank, You will want to check the capacitor, transformer, and the magnetron. The diode is also a very good possibility of being the issue. Aside from checking for less than 1 ohm of resistance also check for cracks in the magnet on the magnetron. The resistance check is just checking the filament but if the magnet is cracked then the magnetron would need to be replaced.

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Troy for Model Number jvm3670sf02

I have a GE microwave that is not heating. I was adviced to replace the magnetron and the diode, but after checking magnetron ohmic value, I thought it was a good reading since it was less than 1 ohm. The diode was definitely shorted. I ordered it through your website. It was $50 plus.... installed and tested. Still no heat and to make the matter worse, I blew the diode (wasted my hard earned $$). Is the magnetron causing this problem ? Should I go ahead and order a new magnetron ? can I get a cheaper version of diode that will work for my unit ? Thanks

1 Answer

Hello Troy. You should always replace the magnetron with the diode on a microwave. Usually the magnetron is what takes the diode out in the unit.

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1 Answer

Hello Sonny. If it is humming loud, you will need to order the diode and the magnetron to repair the issue.

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1 Answer

Brian, You are correct, There has to be a reading in one direction only. If there is no reading in either direction, your diode has failed. You do need an analog or digital meter that produces at least 12 VDC to "kick" through the diode circuit, or a multimeter that has a diode test circuit setting, in order to test the diode properly.

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