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Bpommer  
#1 Posted : Wednesday, November 28, 2012 1:55:06 PM(UTC)
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Bpommer

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After replacing the cavity thermostat the clock , fan, and lights worked. When you try to time cook or use the express buttons, the timer counts down but no heating. Is there another thermostat to replace.
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Gene  
#2 Posted : Thursday, November 29, 2012 12:08:42 PM(UTC)
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Gene

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Check the secondary interlock switch (the top switch) for continuity and inspect the wires connected to the switch.

- The secondary interlock switch Part number: WB24X10029
Part number: WB24X10029



Here are the breakdown diagrams and Parts for GE JVM1640SJ02 Microwave - AppliancePartsPros.com

Gene.
Bpommer  
#3 Posted : Saturday, December 15, 2012 7:33:35 AM(UTC)
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Bpommer

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Posts: 2

Replaced top switch and everything works except it will not heat. What is wrong now?
Gene  
#4 Posted : Monday, December 17, 2012 12:50:32 PM(UTC)
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Gene

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Unplug the microwave. Open the control panel and remove the red and white wires from the transformer primary winding. Plug trhe microwave back and check for 120 VAC between these wires while the control calls for heat and the door is closed.

If the reading is incorrect, replace the smart board.

If the reading is correct, then most likely the problem is a bad magnetron.

- The smart board Part number: WB27X10718
Part number: WB27X10718



- The magnetron Part number: WB27X10305
Part number: WB27X10305


Gene.
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