Question about Whirlpool MH7130XE Microwave Oven
Unit made loud grinding noise then the inline fuse blew behind touch pad.unit is a 1997 whirlpool
Did you replace the fuse yet?
Did the new one blow?
If so, and if it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.
If so, and if if it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.
If the new one did not blow, and the microwave still makes a growling or grinding noise, but does not heat, you probably have a shorted high voltage diode or a bad magnetron.
Here are some links you or someone you know can use (in order given) for test help, but read the safety warnings first:
http://www.gallawa.com/microtech/diode.html (if it is NOT shorted, it's probably fine)
There should also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.
You can usually find helpful exploded view diagrams and order parts by entering your full model number here.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Oct 07, 2008
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