How do I fix a microwave oven that won`t heat?

1 ANSWERS

1. Guest8333
   

   A loud buzz, hum, or groan is usually a shorted high voltage rectifier diode, but a sound like gurgling into an empty coffee mug is one symptom of a failed magnetron, and yet the mag can be bad without that sound.
   
   We have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are operating here: http://tinyurl.com/y9gn7v7
   
   The service manual is at our site here:
   http://www.microwavedisplay.com/mv1610_sm.pdf
   
   (there should be an understroke between mv1610 and sm)
   
   Here are some links you or someone you know can use (in order given) for high voltage section test help, but read the safety warnings first:
   
   http://www.gallawa.com/microtech/diode.html
   (if it is NOT shorted or burned looking, it's probably fine)
   
   http://www.gallawa.com/microtech/mag_test.html
   (continuity can be good even though mag is bad!)
   
   You can find links to helpful exploded view diagrams and part ordering help here: http://www.microwavedisplay.com/parts.htm
   
   I'd recommend that your bookmark this link to your favorites.
   
   Accessing some parts may require you to pull the oven from the wall and remove the cover.
   
   If so, the installation instructions are very handy, and it's best to have two people since the microwave can be heavy and awkward.
   
   You should be able to download your LG / Goldstar manual here:
   
   http://136.166.4.200/SubPages/DA_Microwave.htm
   (there's an understroke between DA and Microwave)
   
   If it's not there, you can contact them via that page to order one.

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