Question about GE JVM2070 Microwave Oven

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JVM2070 heats, no "fan" while running, no turntable

I have a JVM2070 that got wet (tub above kitchen leaked). It heats, but there is not the usual amount of noise and the turntable does not turn. The fan does not run while it is heating, but runs when I use the buttons at the bottom of the control panel. I suspect the noise that I am missing is because the "stirrer" is not working. I checked the top and side stirrer motors, and the continuity is good. I also checked all of the TCOs and they have the appropriate continuity. Fuses are fine. Any ideas?

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I would suspect the primary interlock (bottom door switch) has failed, or maybe its mount is loose.
If it's not activating, then the oven lamp, internal cooling fan, turntable, and stirrer will fail to come on, and the oven will not cook since the high voltage section will not be receinving power.

The hood vent exahsut fan (which you can turn on and off at will) still runs, since it is a different part of the circuit.

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.

See these files:
http://www.microwavedisplay.com/safety.txt
http://www.microwavedisplay.com/disassembly.txt
http://www.microwavedisplay.com/doorsw.txt

You can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.

If a switch is all you need, we offer a universal type for only $5 postpaid which you can order here.

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

NOTE: The FixYa system is not currently notifying me when folks reply to my posts, so please contact me directly for more help.

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

Posted on Sep 11, 2009

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Hi. It sounds to me like the control PCB was damaged and is not switching power to the cooling fan or T/T motor.... Does the oven light work?

Posted on Sep 11, 2009

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1 Answer

Oven heats, but light, fan and turntable do not come on.


Hi Ted

many microwaves have safety mechanisms to reverse, or stop the turntable if it senses resistance to the turning. This is done both because
  1. the turntable is usually driven by a small motor with a gear reduction transmission to get more torque on the glass platter and your food, and if something resists the turning, it can damage the gear train or belt if it keeps running.
  2. if you have something with liquid in it and it hits a wall, it could tip over, possibly spilling scalding liquid all over and maybe surprising the person who opens the door.
In some cases, it'll just stop and then try again the next time you run the microwave. The banging on the case sometimes turning things back on suggests that either something in the turntable mechanism is awry, or that there is a common hot wire, ground loop, or possibly fuse for the light/fan/turntable.

the manual for the oven doesn't really say anything about this.

You can see generic intructions on looking for an internal fuse here
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With regard to the turntable, in particular, it's really easy over time for exploded spaghetti sauce, spilled cocoa, and overmelted butter to have run down into the indentation in the middle of the bottom of the oven cavity. Remove the platter. Is it clean in there? Does it look like the 'this person never flosses' picture for mechanical rotors? If so, start with some kitchen cleaner and a washcloth damp (not soaked) with hot water. Let the cloth steam /warm the area a bit, wipe it down. repeat if necessary. If there's a lot of cruft built up there, that could be keeping you on the edge of safety shut-down.

Good Luck!
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