Question about GE Microwave Ovens

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Product is GE Microwave (Spacesaver-type) JNM1731DM1BB. New surface light bulbs installed. Unable to turn them off or change from bright to dim

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  • Mary Davis
    Mary Davis Apr 04, 2015

    I installed generic bulbs under the built in microwave oven (the microwave is installed above the regular cooking surface). The venting system for the cooking surface on the stove is also a part of the microwave. The bulbs light up just fine when installed, however, I am unable to turn them off, set the switch from bright to dim, or set the night-light timer. In other words, I cannot operate the lights using the microwave keypad. The only way I can turn off the lights are to remove them!

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  • GE Master
  • 473 Answers

Bottom lights are controlled through relays on the main control board which is mounted on the back of the touch pads (control panel).You can check and see if wires are touching each other on the board but my guess is the board is defective and needs replaced.

Posted on Apr 05, 2015

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1 Answer

Changed the light bulbs in my ge jvm315 and know the surface light will not turn off ?


This sounds like the control board also called a smart board in some models has to be replaced.

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I've seen this with most microwave ovens I've had. When the microwave emitter kicks in to cook, the unit uses much more power, providing less to the internal bulb, which dims a bit. Unless it's very dramatic, for example the bulb turning off or going almost out, it's normal behavior. If the bulb is going very dim or out, it could be that the circuit it's connected to isn't providing enough amperage to adequately run the oven. In the case of your microwave, it's rated at 15 amps, so should have adequate power on a standard household circuit by itself.

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The fuse is probably located behind the grille, and it may again be behind a small panel behind the grille. Look for the fuse label when you get the grille off.

There is a video here which shows you how to remove the grille.

But chances are good that you also damaged the circuit board when you removed or inserted the bulb without first unplugging the oven, as it says on the label by the light socket.
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Very angry. Fairly new, little-used Spacesaver Microwave [3][Clock][Surface Light] buttons now do not work. We never even press [3], just [1] and [2] to warm sandwiches.
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1 Answer

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We see (and repair) this a lot. The problem is on the control panel, which we regularly repair nationwide by mail for $39.95 postpaid in about a week or two.

At our Web site, you can get details of our service, plus we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

The lights can can be inoperable or stuck on or stuck in "night light" mode. Sometimes this will similarly affect the fan operation or inside light, too.

Feel free to contact me directly (and please remind me of your full model number from the tag on the unit) for more information & help.

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

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com
Microwave Oven Control Panel Repair Nationwide

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1 Answer

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Unfortunately they are controlled by the circuit board and it is not repairable. The board will have to be replaced.Depending on age of unit you should call manufacturer and see what they say < might repair free>

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1 Answer

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We see (and repair) this a lot.

The problem is on the control panel, which we regularly repair nationwide by mail for $39.95 postpaid in about a week.


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.

This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

Details of our service and critical safety information and disassembly information is at our site, and our link is at our listing here on FixYa.

Feel free to contact me directly (and please remind me of your full model number) for more information & help.

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

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

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This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed
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This often can affect the exhaust fan operation, too. The lights and fan can be inoperable or stuck on.

If you or a friend decide to look into it, we have critical safety information and disassembly information at our site,
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