Having problems with your Whirlpool GU2400XTP Built-in Dishwasher ?

Loud Whining/Humming noise while washing

\015 The dishwasher functions normally except for the following problem. When it is washing it makes a loud humming/whining noise. The washing cycle periodically pauses and the noise disappears but starts again when the dishwasher resumes washing. I checked the chopper assembly and removed any debris from this area and the sound remains. I also ran throught the diagnostic cycle and the noise is only evident when the wash motor is running. If the problem is in the pump motor or pump sump is there a good way to find out which it is? Any help is appreciated.\015

Answers :

It's noisy\015\012\015\012If your dishwasher seems noisy, check these:

Water-inlet valve
Motor
Heater fan
Pump
\015\012\015\012\015\012\015\012Water-inlet valve\015\012\015\012An aging water-inlet valve can sometimes fail slowly, rather than all at once. It can shudder on and off rapidly, causing the incoming water lines to shake, rumble, and rattle--sometimes violently. If yours is doing this, replace the inlet valve.

\015\012\015\012\015\012\015\012Motor\015\012\015\012If it's the motor that's noisy, either of these may be the "culprit:"

\015\012
    \015\012
  • As motor bearings wear out, they can become quite loud when the motor runs. They wear out quickly if they frequently get wet, because the water washes away the motor bearing grease. Bearings can get wet if the spin seal is defective. Then there will also be water leaking onto the floor beneath the dishwasher. Replace the seal if it leaks (read about the main tub seal in the "It leaks" section, later).

    \015\012
  • If, from beneath the dishwasher, you can see a round, plastic disc that's mounted to the top of the motor (a "slinger"), it may have broken free of the motor shaft. If so, it could be rattling around the shaft while the motor is running. If that's the problem, you need to replace the motor.

\015\012\015\012\015\012\015\012\015\012Heater fan\015\012\015\012If the heater fan bearings are rusted or worn, they may squeal, or scrape loudly during the drying cycle. If this is the problem, replace the fan motor. Alternatively, the fan blade may be loose. If so, you need to replace it.

\015\012\015\012\015\012\015\012Pump\015\012\015\012Small fruit pits, toothpicks, and fragments of glass sometimes get stuck in the pump. When this happens, open the pump and remove the debris. The pump is usually mounted directly to the motor, then attached to the bottom of the dishwasher.

To get to the pump, you usually need to remove the lower rack, the spray arms, and the spray arm support from the inside of your dishwasher. A dishwasher pump isn't obvious. Look for an impeller--a round, plastic fan blade-type device that spins around and pushes the water toward the drain. When you can see the drain impeller, you should be able to see the clogging debris.
When the dishwasher first comes on there is an intermittant rubbing sound. Any ideas?
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