Question about Kenmore 63672 Convection/Microwave Oven

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Kenmore Microwave turned off, not back on

After cooking an 11 minute dish in the microwave last night, our Kenmore Microwave model 665.61639100, serial number xcl2316605 completely turned off. It is mounted above the stove and wired to a regular receptical. There was no power surge and there are no breakers tripped at the box. The receptical still works (other appliances tested) but the microwave will not come back online, even after an hour unplugged. Is there a reset button or some other trick? It was manufactured in 2001.

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  • catb723 Oct 27, 2008

    I just had the same problem with a GE microwave after 10 minutes and 30 seconds!

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Both of you have suffered at least a failed fuse and these are nearly always inside the housing.
Sometimes the fuse (which are calibrated pieces of special wire) will fail from metal fatigue but it can also mean that either the heavy current, high voltage rectifier that produces the magnetron voltage or the magnetron itself has failed.
Some units have separate fuses for the control and display electronics and another, very high current (~30 Amp)  fuse for the magnetron circuit.
Do not attempt to open the unit unless it is, and has been, unplugged for an hour or more.
Gaining access is generally not difficult and either the back panel or top can be removed with a half-dozen screws. The fuses may not always look the same but the most common is a ceramic case with metal ends and it might be pushed into a simple fixture that snaps over the metal ends.
If you do not own a simple digital multimeter, I recommend buying one. They are available from various sources; electronics and auto parts stores will have them for under $20 US or if in the US, check your local directory for Harbor Freight outlets. I have bought several for $3.00 there and scattered them around vehicles and the normal junk drawer in the kitchen. Even the simplest of these will have several basic ranges and the resistance range is the one used for checking that fuse.       Remove the fuse from its clips and measure it between the metal caps on the low range (often 200 Ohms). If the display does not change, the fuse is blown; if it shows something in tenths or at least below 10 Ohms, it's OK.  
If you care to delve further into your microwave at all instead of replacing it (they have gotten almost too cheap to repair), comment back here again and I will try to guide you further.

Posted on Nov 17, 2008

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