GE Dishwasher Spray Arms Not Spinning: Troubleshooting... | appliancefaults.com

Technical Background:

The main control unit (MCU) on the GE dishwasher controls the wash pump and diverter motor (if equipped). The MCU energizes relays to provide 120V AC to these components. If the sump filter is blocked or the pump is failing, the MCU might not detect proper flow and shut down the pump.

Symptoms:

The homeowner reports that the dishes are not getting clean and that the spray arms inside the GE dishwasher are not rotating during the wash cycle.

Possible Causes:

Clogged sump filter
Blocked spray arm nozzles
Weak or failing wash pump motor
Defective diverter motor (if equipped)
Low water pressure to the dishwasher
Faulty control board relay

Solution:

1

Disconnect power to the dishwasher at the breaker panel. Confirm no voltage with a multimeter.
2

Remove the lower spray arm and inspect for clogs. Use a small wire or toothpick to clear any obstructions.
3

Remove the sump cover and filter. Clean thoroughly under running water, removing any food particles or debris.
4

Inspect the wash pump impeller for obstructions. Remove any debris carefully.
5

Check the voltage to the wash pump motor using a multimeter while the dishwasher is running a wash cycle. You should see approximately 120V AC.
6

If the voltage is present but the pump is not running, the wash pump motor is likely defective and needs replacement. Use a 5/16-inch nut driver to disconnect.
7

If the dishwasher has a diverter motor, test its operation. A faulty diverter motor can prevent water from reaching the spray arms.

Safety Warning:

Disconnect power to the dishwasher at the breaker panel before performing any repairs. Lock out/tag out (LOTO) the breaker to prevent accidental energizing. High voltage is present when the dishwasher is operating.

Prevention:

Clean the sump filter monthly. Avoid placing large food particles in the dishwasher. Use a dishwasher cleaner regularly to prevent buildup.

Expert Tip:

Enter service mode by pressing and holding the 'Start' and 'Cycle Select' buttons simultaneously for 5 seconds. This will allow you to run diagnostic tests on the wash pump and other components.

Frequently Asked Questions

•How do I access the wash pump to inspect it?

You'll need to remove the lower spray arm, sump filter, and sometimes a lower access panel inside the dishwasher. The pump is typically located at the bottom of the unit. Disconnect power first!

•What is the proper way to test the diverter motor?

Use a multimeter to check the voltage to the diverter motor during a cycle change. You should see 120V AC intermittently. Also, visually inspect the motor for any signs of damage or binding.

•Where is the sump filter located and how do I remove it?

The sump filter is generally located at the bottom of the dishwasher tub, under the lower spray arm. Typically, you'll need to turn it a quarter turn counterclockwise to release it.

GE Dishwasher Spray Arms Not Spinning: Troubleshooting and Fixes

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the wash pump to inspect it?

•What is the proper way to test the diverter motor?

•Where is the sump filter located and how do I remove it?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: