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GMB939JC119 General Electric Dishwasher - Instructions

All Instructions for the GMB939JC119
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1-2 inches standing water at end of cycle.
Remove shield in rear. Unscrew valve using hand. Screw new valve in place.
Parts Used:
Piston and Nut Assembly
  • Ernest from Johnson City, NY
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Nutdriver
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Dishwasher wouldn't drain completely between cycles, causing it to overflow.
First I opened the dishwasher and removed the lower basket. Next I removed the 4 screws that hold the food filter plate in place at the back of the tub. Then I unscrewed the Piston/Check Valve assembly counterclockwise, located at the back center of the tub, by hand. I replaced the old part with the new one and reinstalled the filter plate. I ran a rinse cycle to verify that that all of the water was purged. Finally, I reinstalled the lower basket and resumed using my dishwasher.
Parts Used:
Piston and Nut Assembly
  • Ohlen from Springfield, SC
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    Less than 15 mins
  • Tools:
    Nutdriver
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End of cycle water in bottom of nDishwasher
Removed screen bottom rear andfound a plunger type part, unscrewed plunger and found it was distressed around it and did not close of a tight seal. Placed new part into location and dishwasher now proforms perfect...
Parts Used:
Piston and Nut Assembly
  • Bonita from Alexandria, VA
  • Difficulty Level:
    Easy
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Screw drivers
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Frequently get "Blocked Spray Arm" message - washer stops
Removed the 4 screws holding the filter screen assembly in the back of the tub. This exposed the Piston and Nut assembly which unscrewed fairly easily.
Replaced with the new part, put the filter screen assembly back in place ran the machine. The machine still stops with the blocked arm message - just not as frequently. The web researched fix with the piston and nut assembly replacement was obviously not the final answer. I am now out of options I believe except to bite the bullet and get a new machine. Any other suggestions are welcomed.
Parts Used:
Piston and Nut Assembly
  • Walter from Yarmouth, ME
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Screw drivers
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Pump seal was leaking
I disconnected the power shut off water supply. I then removed the drain hoses and water supply to the old pump. I removed the ground wire and the mounting rod to the old pump. Once removed, I followed the easy illustrated diagrams and instructions that came with the replacement pump.
I mounted the new pump using the supplied hardware and reconnected suply line and drain hose. I turned water supply and power back on. Ran a test cycle before reinserting under countertop. Amazingly quiet and no leaks. Repair a success.

I would use this service again if needed for additonal home appliances.

Thank you
Mr. Buddy King
Parts Used:
Motor and Pump Kit
  • Buddy from Danville, IL
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    1- 2 hours
  • Tools:
    Nutdriver, Pliers, Screw drivers
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water remained in the dishwasher after the running cycle
After two repair people were unable to solve the problem, I read similar stories in your forum and decided to replace the check value as a last ditch effort. Looking at your diagrams it seemed like an easy repair. Removed four screws with nutdriver and replaced value by hand. Ran washer three times and water drained completely. Still puzzled that this wasn't the first thing a repair person would check.
Websight very helpful.
Parts Used:
Piston and Nut Assembly
  • charles from baunbridge, GA
  • Difficulty Level:
    Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Nutdriver, Pliers
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dishwasher didn't drain
took out 4 screws pulled piston out and changed put back together. very easy and inexpensive!! thanks
Parts Used:
Piston and Nut Assembly
  • JACALYN from TREVOR, WI
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Socket set
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Dishwater Would Not Start Or Reset And Wiykd Beep Reoeatedky
The replacement of the motor and pump assembly went smoothly and without difficulty however this did not fix the problem. It then appeared that the inlet water valve was not operating properly, so this part was ordered and instlled, a very simple proceedure that could be done witrhout removving fthe dishwasher from its cabinet. -- Again failure to run -- the timer assembly and electronic panel were then removed and examined. The control panel had no visible defects, so the timer assemblyand its cover was removed and examined . Uing a variable power supply the drive motor for the timer was energized and tested. As the motor ran properly the electrical switching contacts were then carfully checked, it was discovered that one contact set was heavily pitted and burned. These contacts were carefully cleaned and pollished with 1000 grit sanding paper. The actuator leaves were examined and two sets were found to be slightly out of alignment. The leaves on these sets were bent slightly to insure they were in line with the rest of the leaf serts. It was then noted that the rotating leaf('s) actuator had a home position indicated by a molded depression at one location and the motor was energized using approximately 5 volts ( a nine volt battery could also be used as a poer supply) observing prolper polarity to run the rotator until the home position was established and the actuator rods paul dropped into this depression. The assembly was then replaced in the diswasher using care to make sure that the actuation arm and spring were positioned properly weith the arrow end of the arm located in the recesss of of the rotating timer disk use care in placing the assembly and do not lose the sping which attaches to a mounting post and the arm. You may want to take a picture of the spring and arm locations when you rwmove the timer assembly to properly re-assemble all components, the repaired unit was placed back in its cabinet and a full cycle run to establish proper operation. And unit checked ok! Some of these proceedures are not for the weak of heart. I am a retired engineer who has been repairing my own equipment since graduation. .
Parts Used:
Motor and Pump Kit
  • John from The Woodlands, TX
  • Difficulty Level:
    A Bit Difficult
  • Total Repair Time:
    More than 2 hours
  • Tools:
    Nutdriver, Pliers, Screw drivers, Socket set
3 of 7 people found this instruction helpful.
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standing water at the bottom of the dishwasher
remove the screen at the back bottom of dishwaser. (4 screws). Unthread piston and and nut assembly for check valve....thread in new one.
Problem solved....no more water $10 part....no repair person !!!
Parts Used:
Piston and Nut Assembly
  • renee from shelby twp, MI
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Socket set, Wrench set
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Fill Cap Just Keep Turning, Not Locking In Place
I Just Open Door And Put Fill Cap In And Turn That It
Parts Used:
Rinse Aid Fill Cap
  • Broggie from Burlington, NJ
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    Less than 15 mins
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Would not drain
The repair kit solenoid was mounted in a metal bracket. My unit has the solenoid and mounting bracket as one piece. If the solenoid was separate it would have been an easy fix. As it was I had to cut the solenoid out of the bracket to mount it in my unit which this kit was suppose to fit.
Parts Used:
Drain Solenoid Repair Kit
  • David from Doylestown, OH
  • Difficulty Level:
    A Bit Difficult
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Nutdriver
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Dishwasher was not draining completely
Just remove the 4 screws at the lower rear inside the washer to remove screen holder...then unscrew the Piston and Nut Assembly by hand. Put in the new unit, reattach the screen holder with the 4 screws...and the job is done. Probably takes less than 5 minutes....very easy.
Parts Used:
Piston and Nut Assembly
  • Gene from Rocklin, CA
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    Less than 15 mins
  • Tools:
    Nutdriver
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Dishwasher wouldn't pump all the water out every time. And developed a small water leak.
Recieved universal parts f/ pump & mtr assy. sorted them out, picked the ones I needed to complete my repair. Installed new assy, checked operation and was completly done in about an hour.

My old bones needed a break, or I could have been done faster. All's well, and the dirty dishes are back getting cleaned via machine, and not us.
Parts Used:
Motor and Pump Kit
  • Mark from Yorkville, IL
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Nutdriver, Pliers, Screw drivers
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My motor froze up
Not really difficult to do. First remove the washer from the counter and flip it over. Carefully determine the correct drawing in the instructions which matches your machine. Follow insructions and double check everything. Took about an hour - and I saved about $350.00 by fixing it myself rather than buying a new one!
Parts Used:
Motor and Pump Kit
  • John from Crystal Lake, IL
  • Difficulty Level:
    A Bit Difficult
  • Total Repair Time:
    1- 2 hours
  • Tools:
    Pliers, Screw drivers, Socket set, Wrench set
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Rinse Aid Fill Cap missing from dishwasher in condo I just bought.
Opened package, removed cap and screwed it in place.
Parts Used:
Rinse Aid Fill Cap
  • Harry from Franklin, TN
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    Less than 15 mins
1 of 2 people found this instruction helpful.
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All Instructions for the GMB939JC119
91 - 105 of 231