Part Location Diagram of WH12X10478 GE Washer Timer
See part 100 in the diagram
( Grid squares measure 1x1 inch )
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Washer Timer

$340.12
  Special Order
PartSelect Number PS3487294
Manufacturer Part Number WH12X10478
Manufactured by GE
Product Description

Washer Timer Specifications

The timer controls most of the operations of the washer: water level, tub filling and emptying, length of cycles, and cycle setting sequences.
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Troubleshooting
This part works with the following products:
Washer.
This part works with the following products:
General Electric, Hotpoint.
Part# WH12X10478 replaces these:
AP4929075
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Questions and Answers

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11 questions answered by our experts.
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Robert
September 5, 2017
Does everything but spin.
For model number GHWP1000M0WW
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Hello Robert, thank you for contacting us. Sounds like it could be the lid switch, if that is faulty it will not allow the washer to spin. Hope this helps!

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Tim
December 27, 2017
Motor continues to run once cycle is finish. Only way to turn it off is to lift the lid
For model number GTWN3000M1WS
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Hi Tim, Thank you for your question. If the motor is continuing to run after a wash cycle is over, you will need to check the timer and the lid switch. I hope this helps. Thank you and have a great day!

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Tim Mccarthy
March 30, 2018
I turn on my washer and it seems to do everything but fill with water? Any suggestions what my problem might be?
For model number gtwp2000moww
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Hello Tim, thank you for your question If the unit is not filling, I would recommend replacing the water inlet valve part number WH13X23974. Please enter the part number into the site for current price and availability. Good luck with your repair!

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James
June 28, 2019
Control not synchronized with cycle
For model number GTWN3000M0WS
PartSelect logo
Hello James, Thank you for the question. With the information provided, this sounds like the timer is defective and will need to be replaced. Hope this helps!

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Robert
September 5, 2017
Everything on washer works, but it doesn't spin. Lid switch does ohm out. Belt looks good and it does agitate
For model number GHWP1000M0WW
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Hi Robert, Thank you for your inquiry. The agitation of your appliance is actually a separate function and has separate parts to the spinning of your machine. It seems like you may want to take a look at all of the bearings and hubs that are attached to your transmission. Just to make sure that nothing has worn down. You may also want to test your capacitor to see if it is still working. The other thing that may be causing your issue would be the transmission itself. I hope that helps. Good luck with your repair.

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Jeanette
December 19, 2017
Water continues to overflow, we already replaced the pressure switch and tubing, but water continues to keep overflowing in all wash cycles and size of loads. Is this a issue with the timer switch or could it be something else? Thank you
For model number GCWP1000M1WW
PartSelect logo
Hi Jeanette, Thank you for your question. It sounds like you may want to also check your water inlet valve. That would be the next part I would check after the pressure switch and the tubing. I hope that helps. Good luck with your repair.

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Ian
March 26, 2019
My washer goes into a high speed spin after agitating and the centrifugal force sends water out the top and out of the flood hose. I already changed the flood gasket and checked the pressure switch. Why would the washer go into spin when it is full of water?
For model number GTWN3000M1WS
PartSelect logo
Hi Ian, Thank you for your question. If your washer is spinning during the wash cycle, there could be an issue in the shift assembly and it will likely need to be replaced. I hope this helps. Thank you and have a great day!

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Bill
November 20, 2018
GE washer will not fill or agitate (but i haven't filled to proper level) will pump and spin whats going on is it that water level hose
For model number gtap2000m0ww
PartSelect logo
Hello Bill, thank you for your question. There are a few parts you will want to check to determine what the issue is. The lid switch part number PS5135698 , the water valve part number PS11721803 and the water pressure switch part number PS3487292 and pressure hose part number PS272183. There is lots of information on testing, and replacing these parts on our site if you search each part number. I hope this helps!

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Dean
January 29, 2020
GE washer all controls set to off, machine sat unused for a week, no water in tub, etc.. suddenly, on it's own, it is making loud clicking noises (sounds like an electrical relay). noise occurs at random intervals 2 seconds, 5 seconds, 1 second, etc. nothing happens, but this crazy clacking noise. i checked the led flash code on the motor, and it appears normal 1 second on, 1 second off. i have cycled all the controls, and pulled the power cord. as soon as the cord is plugged back in, the clacking noise resumes. i pulled the front cover, but the noise echoes around so much that i cannot tell where it is coming from. any suggestions?
For model number GTWN3000M1WS
PartSelect logo
Hello and thank you for writing. This is certainly a part is sending a signal to the control board, it is hard to diagnose or even guess which part would be the one that causes this issue. You would have to take a multimeter and check certain parts for defects, such as the lid switch PS1482372, timer PS3487294, temperature switch PS3499718 and water-level pressure switch PS3487292. We hope this helps. Please contact us anytime if you require further assistance.

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Jacob
November 24, 2021
water continuously fills with water replaced water inlet valve also pressure switch. Would the timer have any thing to do with this situation?
For model number GCWP1000M0WW
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Hi Jacob, Thank you for your question. If your washer will not stop filling with water and you have already replaced the water inlet valve and the pressure switch, check the water pressure hose to see if it is clogged or if there is a hole in it that would reduce the pressure. Also, check and see if it has fallen off. To test the hose, open your washer’s cabinet and locate and remove the water level switch and the water pressure hose. Once removed, plug one end of the water pressure hose, submerge it in water, and blow into the other end. An undamaged hose will not have any bubbles coming out of it. Inspect the hose and the valve for any signs of cracking, wear, or damage. If any issues are found when performing the checks above, you may need a replacement water level switch. If this is not the issue check the water pressure in your home. If it is fine, then the issue may be with the timer and you will need to test it for continuity with a multimeter to see if it is working correctly. Set your multi-meter to the Rx1 setting, place the probes on the timer contacts (as noted by your wiring diagram) and press and hold down on the switch’s button. You are testing for continuity and should receive a reading of zero or nearly zero. If you do not receive this reading, you will need a replacement start switch. We hope this helps! Good luck with the repair!

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Related Parts
Model Cross Reference
This part works with the following models:
PartSelect Number: PS3487294
Manufacturer Part Number: WH12X10478
Brand
Model Number
Description
General Electric
GCAP1000M0WW
Washer
General Electric
GCWN3000M0WS
Washer
General Electric
GCWN3000M1WS
Washer
General Electric
GCWP1000M0WW
Washer
General Electric
GCWP1000M1WW
Washer
General Electric
GCWP1005M0CC
Washer
General Electric
GCWP1005M1CC
Washer
General Electric
GDWF800VWW
Washer - Washer
General Electric
GHWP1000M0WW
Washer
General Electric
GHWP1000M1WW
Washer
General Electric
GLWP2000M0WW
Washer
General Electric
GLWP2000M1WW
Washer
General Electric
GMAN3000M0WS
Washer
General Electric
GMR05BLHCSCA
Washer - Washer
General Electric
GNR22DGEBRWW
Refrigerator - Refrigerator
General Electric
GTAP1000M0WW
Washer
General Electric
GTAP2000M0WW
Washer
General Electric
GTWN3000M0WS
Washer
General Electric
GTWN3000M1WS
Washer
General Electric
GTWP1000M0WW
Washer
General Electric
GTWP1000M1WW
Washer
General Electric
GTWP2000M0WW
Washer
General Electric
GTWP2000M1WW
Washer
General Electric
GTWP2005M0CC
Washer
General Electric
GTWP2005M1CC
Washer
Hotpoint
HTAP1000M0WW
Washer - Residential
Hotpoint
HTWP1000M0WW
Washer - Residential
Hotpoint
MTAP1000M0WW
Washer - Residential
Customer Service Representative

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