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GE JVM1790CK Support Question

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Question posted by rjminlvld on August 17th, 2020

Convection Fan Doesn't Turn Off

I used the convection bake option on my 2009 GE oven last week, and after done, the convection fan comes on every time I open the door of the oven. Can you trouble shoot the issue, and suggest a part/repair?

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Answer #1: Posted by INIMITABLE on August 17th, 2020 6:51 AM

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REF: https://data2.manualslib.com/pdf3/73/726...

The above link is to the service manual for your microwave. On page 45, is the wiring schematic. In the center, you will find the Fan Motor listed just under the Oven Lamp. The only way for the fan motor to run is for both the Primary Interlock Switch (i.e. what you called the "bottom door switch") and the Main Relay (Lamp Relay) on the PCB to be closed. The problem is the Primary Interlock Switch is supposed to be open when the door is opened which would effectively remove the 120VAC from the cooling fan. You state the "bottom door switch" measures NC, but did you test when the door is opened? Go to page 40, and perform the test for the interlock switches. Your primary interlock switch has to be bad (i.e. stays closed no matter what the door does). Therefore, when the door opens and the Lamp Relay closes to turn on the interior lamp, it also closes the cooling fan circuit.

Also, look at page 27 and read the section about the monitor switch (i.e. the "middle door switch"), and its purpose is to blow the main fuse when the contacts of the primary interlock switch and power relay fail to open when the door is opened. So when you perform the test on page 40 for the primary interlock switch, also perform it on the monitor switch.

Also, look at page 25 and read the Note in the Line Fuse section. Namely, if the fuse is blown because of the monitor switch function, you need to replace the monitor switch and to test the power relay and interlock switches for shorts.

Source:.https://www.ifixit.com/Answers/View/485424/Fan+stays+on+when+door+is+open,+door+switches+test+good

I hope this is helpful? PLEASE "ACCEPT" and mark it "HELPFUL" to complement my little effort. Hope to bring you more detailed answers

-INIMITABLE

Related GE JVM1790CK Manual Pages

Owners Manual - Page 1

... when the door is open. 3828W5A4678 49-40480-1 08-08 JR Para consultar una version en español de este manual de instrucciones, visite nuestro sitio de internet ge.com. ge.com GE Profile Convection/Microwave Oven Safety Instructions 2-6 Operating Instructions Bake Features 10, 18, 20 Best Method of Cooking Chart . . . .21 Changing Power Level 14 Cooking Options 10 Cookware...

Owners Manual - Page 2

... oven door closed, turn the oven off and disconnect the power cord, or shut off power at the fuse or circuit breaker panel. Do not leave paper products, cooking utensils or food in the oven when not in use. -Do not pop popcorn in your microwave oven unless in a special microwave popcorn accessory or unless you use popcorn labeled for use...

Owners Manual - Page 5

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Owners Manual - Page 6

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Owners Manual - Page 8

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Owners Manual - Page 9

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Owners Manual - Page 10

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Owners Manual - Page 11

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Owners Manual - Page 12

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Owners Manual - Page 13

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Owners Manual - Page 14

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Owners Manual - Page 15

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Owners Manual - Page 16

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Owners Manual - Page 17

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Owners Manual - Page 18

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Owners Manual - Page 19

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Owners Manual - Page 24

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Owners Manual - Page 25

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Owners Manual - Page 31

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Owners Manual - Page 32

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