Question about Whirlpool GH8155XM Microwave Oven
I have GE model # JVM1660WB. I had the same problen about 1-2 years ago, and replaced the magnitron, diode, and stir plate which all came in a kit. Worked fine until now. This time I replaced with same kit and it only worked one time when I tested with a cup of water. Next day when reheating leftovers, it started buzzing and not heating again. I believe both diodes are shorted, but think the mags are good. What is causing the diodes to short? Also the fuses do not blow like some of the other problems I have seen on this site.
I have just replaced the magnatrton for a Kenmore microwave model # 665.606.5900 as before replacing the part there is still the buzzing sound and non-heating
Posted on Jul 20, 2013
you cannot check a microwave diode with just a mutli meter . you have to make a test jig take a 9 volt battery and a meter with dc volt scale set up the meter just like you would test a 9v battery .with me so far ? now remove one lead from the battery and insert the diode between the battery and the test lead .......take a reading . now reverse the diode take a reading ........ i just tested a diode before writeing this and this is what i got my battey volts where 9.2 v whith the diode inserted i got 7volts . reversing it i got .02 volts dc . a diode is a one way valve and mine is good because it passed curent only one way ...yours should be about the same ....... if you understand this please leave me 4 stars ! i even went out in the shop and tested a diode for you just to make sure my answer was correct
Posted on Mar 07, 2009
> but he would also replace the capacitor and diod when replacing the mag tube
Most of the time replacxing them all is done due to ignorance about how to actually test devices, a mistaken notion that it's somehow necessary, or to pad the bill.
The diode may be necessary in some cases (if it tests bad) but the capacitor is almost certainly not needed.
When a capacitor fails, it almost always shorts. If so, the fuse would blow when you peress "Start" to begin cooking.
I've rarely (if ever) seen one fail without shorting.
If it's within the magnetron portion of the warranty (usually 5-9 years) but out of the original full warranty (usually 1 year), then GE manufacturer will cover the part cost, but not the cost to visit you or the labor charge to do the work.
If you're doing this yourself, G.E. will send you the magnetron to do it yourself. Call them at 888-239-6832.
Be persistent. You may have to speak with a supervisor.
You can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.
> Can I just replace the mag tube without also replacing the diod and capacitor?
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
William E. Miller
Posted on Sep 11, 2009
The part that you did not replace is the problem with the oven, the magnetron. It typically fails and shorts out, causing the oven to make a loud humming noise. Not worth fixing since the cost of the magnetron is typically as much as a new oven. Sorry that you spent your time an money replacing the wrong parts.
Posted on Jul 14, 2010
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