Question about Microwave Ovens

2 Answers

Oven does not operate

Had a very small fire inside oven and now nothing works including clock, does not give any indication that its getting power. although out let will operate other appliances, did not hve to use water or fire extinguiser, with the exception of a little black soot and burnt smell you would not know there is a problem, very minor cleanup required.

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  • Mark T White Jan 28, 2009

    Hello, its a GE model # JVM1563WH05, have sides and top of cabinate off (all one cover) cant see anything that looks out of ordiary found one fuse near controll simaler to older automotvie says 20 amp on one end body is coverd so I cant tell if its blown by looking but put ohm meter and read across ends and it does regester so assumed it was ok and reinstalled it, also put meter across what looks like small round sensers located in various places around oven and havent found one yet that wont register or make the needle on meter move Thanks

  • Mark T White Jan 28, 2009

    Had automotive type fuse out of circut when tested , all other small round ( about the size of a dime) sensors? were tested in circut, havent yet located bullet shapep thermal fuse. fire was not that big ,only slightly blackend inside of oven. Would thermal fuse be located some where above oven roof/top ? this would probbly be the only aera where fire got hot enough. no signs of any plastic parts being distorted.

  • Mark T White Jan 29, 2009

    Thanks I belive Thats the problem

  • Mark T White Feb 01, 2009

    found sensor parts wharehouse labels it a thermostat ? any way orderd and on way , new problem is what to use to clean up black soot stain , some wiped right off with normal kitchen cleaners , some is on really tough. Help.

  • Mark T White Feb 01, 2009

    found sensor parts wharehouse labels it a thermostat ? any way orderd and on way , new problem is what to use to clean up black soot stain , some wiped right off with normal kitchen cleaners , some is on really tough. Help.

  • Mark Egan May 11, 2010

    Did you test the fuse out of circuit, or in circuit?

    The other things that you measured, did you test in circuit, or out of circuit?

    There are not that many components to measure. Fuse, diode, rectifier, capacitor, and the only one you can get a decent indication on would be the fuse, but only if measured with it out of circuit.

    Can you trace the power wiring as it routes through the unit? Check for power at various points along the circuit until you come across a point that power does not go across (like the fuse).
    I am thinking you need to look for a silver bullet shaped thermal fuse which could have melted due to the fire (again, I don't know how big or hot the fire got, and whether it got hot enough to damage something else is at question.).


  • Mark Egan May 11, 2010

    Please provide the specific model number, but I bet there is some electrical damage inside the unit. You need to open it up and tell us what you see.

    There is a fuse that could have failed, but be careful that you watch what your doing when you power this unit up. It could be dangerous.


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  • Microwave Ovens Master
  • 8,820 Answers

I assume that model is JVM1653WH05?

The fire probably opened the internal flame senor, also known as the oven cavity thermal cutout (TCO) located on top of the cavity.

The TCO part number is WB27X10195 and it's available here.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

You can find helpful exploded view diagrams here.

Accessing the cavity TCO will require you to remove the oven from the wall.

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 can download GE owner's manuals and installation instructions here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

oven does not operate - 262be3d.jpg

Posted on Jan 29, 2009

  • William Miller
    William Miller Jan 29, 2009

    I mean "flame sensor", not senor.. lol

  • William Miller
    William Miller Jan 31, 2009


    Did you mean to award that "FixYa" rating to my solution? *grin*

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  • Master
  • 1,214 Answers

It's usually in the wire bundle leading to the controller board, if there is one. There should be a wiring diagram/schematic somewhere on the unit. You should be able to chase the circuit down from that.

If not, I'll try to find one online.

Posted on Jan 28, 2009

  • Mark Egan Jan 29, 2009

    Thanks! Glad you got it going again!

  • Mark Egan Feb 01, 2009

    If it's painted, then there is a paint available for microwave ovens. The paint that's there is most likely a powder coat. You won't get much better than that, and powder coating is not a process you do at home.

    If it's stainless, then go to a hardware store and get a medium and fine scotch-brite pad. Between that and some Braso, that will be the best you can do.


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I assume that model is JVM1653WH05?

The fire probably opened the internal flame senor, also known as the oven cavity thermal cutout (TCO) located on top of the cavity.

The TCO part number is WB27X10195 and it's available here.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

You can find helpful exploded view diagrams here.

Accessing the cavity TCO will require you to remove the oven from the wall.

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 can download GE owner's manuals and installation instructions here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

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