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Jenn-Air Microwave - JMC70000ADB (Yr 2000)


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2 replies to this topic

#1 louisjames3

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Posted 12 May 2007 - 05:42 PM

The inline fuse burns out several hours after being replaced (therefore probably not door locking mechanism).  No apparent reason for it burning out the first time.  All other appliances operate therefore home power appears to be fine.  Could a faulty component (e.g., main capacitor, magnetron) be responsible?  Other reason? THANX.

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#2 That Guy

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Posted 13 May 2007 - 04:47 PM

Fuses can blow for a couple of reasons, one is a dead short that exceeds the fuse's amp rating. Another is from something in the microwave pulling more power than the fuse can handle. The last is if the fuse holder or wires to it are loose or have been hot and the fuse is burning out from the heat. In other words the fuse holder gets hot and takes out the fuse by melting open the connection inside.

I've seen this more times than I would care to count. Check for discoloration of the fuse holder, tightness of the fuse in the holder, and check the fuse for signs that is has been hot.


#3 louisjames3

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Posted 14 May 2007 - 01:25 AM

Thanx much That Guy!  It was also suggested that a diode may have shorted.  I have had a technician check the unit out twice but all he did was replace the fuse.  I'll have your suggestions with him this week.  Let's hope the old adage holds true:  Three Times A Charm!




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