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Author Topic: JT912 GE electric built in oven - Oven stopped wor,Door locked and will not open  (Read 1056 times)

Offline felber

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  • Member Since: Jun 2016
  • Posts: 5

Own a JT912 GE electric built in oven
Door would intermittently click and lock, turning oven off
This was a mild inconvenience as turning the breaker off for an hour would reset the oven



The lock light or message, started blinking on and off and the door was clicking, trying to lock
Now the oven door is locked and will not open.
The display says Locked
The 9 key is suppose to lock and unlock the door but it has no effect
The keypad and numbers all function properly, (tested trying to set the time) so the 9 key is not sticking or malfunctioning causing the problem

I need help with 2 items:
1. What signal should I follow or test for? I have a meter and I know how to use it
2. With the oven being a built in and the door locked, how do I get to things to troubleshoot?
Some way to get the door to unlock?

You guys are great Thanks for any help in advance

Offline olyteddy

  • Technician
  • Member Since: Jul 2012
  • Posts: 522
  • Country: us
The control panel is held in place by 3 screws (#875 on the picture) There should be enough space at the top of the door that you can get these screws out using a thin 1/4" wrench. http://www.appliancepartspros.com/control-panel-parts-for-ge-jt912bf2bb.html

Offline felber

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  • Member Since: Jun 2016
  • Posts: 5
Thank you
It is my daughters oven and I will take it apart tomorrow after work

Some additional information:
The problem occurred after using the oven
Currently the message "locked" is blinking
Try to turn on the oven produces the message "door" and it will not turn on
Pressing the clear button just produces a beep
Attempt the self clean and get the message "door"

My best guess is the oven thinks the temp is too high and has locked the door.
The oven is ice cold

I am wondering if the oven sensor has failed open, reporting a high temp. A break would explain the previous intermittent clicking then final failure after oven use as the heat of the oven would effect the break. I will try and find where on the control board I can test the resistance of the sensor.

Anyone have any thoughts or comments on this train of thought?
Any other suggestions on what to check?
Thanks for the ideas

Offline olyteddy

  • Technician
  • Member Since: Jul 2012
  • Posts: 522
  • Country: us
Often as not I've seen this behavior associated with one or the other of the microswitches in the latch: http://www.appliancepartspros.com/door-lock-parts-for-ge-jt912bf2bb.html

Offline dab147315

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  • Member Since: Oct 2010
  • Posts: 4980
  • Country: us

Offline felber

  • VIP Member
  • Member Since: Jun 2016
  • Posts: 5
Took control panel off as directed (thanks)
Found latch motor very warm and humming.
removed latch assembly
removed motor from assembly
Plugged motor back in
Motor ran almost a full turn, then stopped at the same place. With slight help motor started running again only to stop at the same spot
Appears gear assembly has a dead spot or possibly missing gear tooth

I will now try to find a motor rather than have to buy a full assembly

Any thoughts on what I found?
Do you agree it is a bad motor?
Anyone ever see this problem before?

Thanks to everyone for the help and links to removal and schematic (included wire colors, great help)
I will update when I can get the part and if it actually fixes the problem