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Customer Questions and Answers for Latch Sister Board (Motorized Latch Control) by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM18037899
Manufacturer Part Number: WP8301848

This latch sister board controls the oven's motorized door lock used for self-clean and safety interlock functions. Replacing a failed board restores reliable lock/unlock operation so your oven can start cycles and complete cleaning as designed.

  • Powers the door-latch motor when commanded by the main control
  • Engages or releases the door lock during self-clean cycles
  • What's included: One latch sister board.

Install notes:

  • Disconnect power at the breaker before servicing
  • Use ESD protection and handle the board by the edges
  • Access is typically behind the control/upper panel; photograph wiring and transfer connectors one at a time
  • After reassembly, verify latch operation before running a full self-clean

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Questions & Answers

For Whirlpool Latch Sister Board (Motorized Latch Control) (Part Number: OEM18037899)

1 Answer

Hello Thi, you can test for voltage at the board pin 16-5 and 16-7; you should have 120vac coming in to the transformer. Then you can test pin 16-2 and 16-3 for 18-20 vac coming out the transformer. If both test good, then you will need to replace the main board part number 8303883, if you don't have the voltage out you'll want to replace the transformer WP9760587. Hope this helps!

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1 Answer

David, It would be recommended to check the oven temp sensors which should read 1090 ohms at room temp and if you check at 350 should be 1654 ohms. If this checks ok then the control board would be the issue.

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1 Answer

Cindy, With the F1 error occurring this issue will most likely be caused by a faulty control board which is part number WPW10438750 which is currently on backorder with an ETA of 6/10/2018 but is subject to change.

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Frank B. for Model Number GBD307PRB01

In the top oven, the top element stays bright red, and the bottom element does not work at all. In the bottom oven, it is the complete opposite. The top element does not work, and the bottom element stays bright red. Since there is more than one element failing, I am suspecting the elements are still good, and I have some kind of control board or wiring issue. However, there are three parts of this unit labeled control board, so I am not sure what is the likely culprit. Any ideas on what part would likely be bad based on the described symptoms?

1 Answer

Melanie, You will want to check the door switches to make sure that they are good but the latch board would only be for the door lock assembly and would have nothing to do with the lights. Also check the wiring to make sure that there is no damaged wires.

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Jon S. for Model Number GBD307PRS01

I noticed the other day the display on my oven was faint, however eventually it brightened and was back to normal. Yesterday while using the oven, the display went black and nothing was shown. All the buttons still seemed to work (made beeps, light worked ect.) and the oven itself seemed to work fine. Shortly after I turned it off, the display worked properly. From what I've been reading not sure if I need a transformer or a electronic control panel. Thank you in advance for your assistance. Jon S. model #GBD307PRS01 black

1 Answer

Jon, This issue will most likely be caused by a transformer that is failing and will be part number WP9760587. To test the tranformer you test by checking for 120 vac at the p16 connector between pins 5 and 7 for 120 vac and if there is power there then test from the p16 pins 2 to 3 for 12 to 24 vac. If there is no power at this point then transformer is bad. If there is power at this point then the control board is faulty. If there is no power at pins 5 to 7 then the control board is faulty.

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Dnrto for Model Number GBD307PRY01

The display has progressively grown faint, occasionally but rarely coming back on before fading again, and now does not work at all. Now, just recently, the oven does not turn on at all. The touch pad is responsive (the oven lights work) and I get a standard "beep" when any button is touched. However, when I hit the start button I get five beeps with no further action. The second beep is longer than the others, like __ _______ __ __ __. Please advise what course of action is recommended and what parts I should order. I've been looking at AP6021413 (Electronic Control Board) and AP6012630 (also Electronic Control Board) but don't understand the difference between the two. Thanks very much for your help.

1 Answer

DNRTO, This issue would most likely be caused by a faulty transformer and would be part number WP9760587 and can be tested by checking for 120 vac at the p16 connector between pins 5 and 7 for 120 vac and if there is power there then test from the p16 pins 2 to 3 for 12 to 24 vac. If there is no power at this point then transformer is bad. If there is power at this point then the control board is faulty. If there is no power at pins 5 to 7 then the control board is faulty.

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1 Answer

Hello Timothy, The control board is WPW10438750 and the Membrane switch is WP8304275. You only need to order the one you want. Both can be ordered if desired but you do not need to order both unless needed since they are sold individually.

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1 Answer

Jude, With the control board having been replaced then this issue will most likely be caused by a faulty membrane switch WP8300440.

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1 Answer

Hello Rhonda, Check the connection for the keypad WP8304272 first. If this is good, the manufacturer recommends replacing the keypad first. If this does not correct the issue, then replace the control WPW10438750.

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