Question about Maytag MMC5000 Microwave Oven
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Posted on Jan 02, 2017
You need to remove the cover, (Power Unplugged!!) look for and check a long glass fuse (usually in a plastic housing)
It's 5000 volt and less then one amp rating.
It's a small wire inside fuse so check it with a meter.
If it's ok, it's most likely the Magnetron which is usually half the price of the machine.
If the fuse has blown, see if there is a black diode, 30-40 mm long, one end is screwed to the case.
Disconnect one end, If you have continuity both directions, it's failed causing the fuse to blow.
Replace that diode / high voltage rectifier and then the fuse.
You should be back in business.
Posted on Mar 16, 2009
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