GE Dishwasher Top Spray Arm Not Getting Water:... | appliancefaults.com

Technical Background:

The dishwasher's Main Control Unit (MCU) controls the diverter valve, which directs water flow to either the upper or lower spray arms. The MCU relies on feedback from sensors (like the water level sensor) to manage the wash cycle. Voltage (120V AC) is supplied to the diverter valve solenoid and the circulation pump motor during specific points in the wash cycle.

Symptoms:

The top spray arm in the GE dishwasher is not spinning or spraying water. Dishes on the top rack are not being cleaned effectively. The bottom spray arm may be working normally.

Possible Causes:

Clogged spray arm nozzles
Low water pressure to the dishwasher
Faulty diverter valve
Damaged or blocked water supply tube to the upper spray arm
Defective circulation pump
Air lock in the water supply system

Solution:

1

Inspect the spray arm nozzles for clogs. Remove the spray arm and use a thin wire or toothpick to clear any debris.
2

Check the water pressure at the faucet under the sink. Ensure the hot water supply is fully open and delivering adequate pressure (minimum 20 PSI).
3

Locate the diverter valve, typically at the bottom of the dishwasher. Test the diverter valve solenoid using a multimeter. It should measure approximately 1-2 kOhms. If the solenoid is open or shorted, replace the diverter valve.
4

Examine the water supply tube to the upper spray arm for kinks or obstructions. Disconnect the tube and check for water flow.
5

Test the circulation pump motor using a multimeter. Check for continuity and proper voltage (120V AC) when the dishwasher is running. Replace the pump if defective.
6

Run the dishwasher with the upper rack removed to observe water flow. This can help identify blockages or pump issues.
7

Check the float switch mechanism. If the float is stuck in the down position, it may prevent the dishwasher from filling properly.

Safety Warning:

Disconnect power to the dishwasher at the breaker panel before performing any repairs. Use proper Lock-Out/Tag-Out (LOTO) procedures. High voltage is present in the dishwasher's electrical components.

Prevention:

Regularly clean the spray arms (at least once a month) to remove food particles and mineral deposits. Ensure adequate water pressure to the dishwasher. Use a dishwasher cleaner to prevent buildup of hard water deposits.

Expert Tip:

GE dishwashers often have a service mode that can be accessed by pressing a specific sequence of buttons (usually Start, Select Cycle, Start). Consult the service manual for your specific model for the correct sequence and diagnostic tests.

Frequently Asked Questions

•How do I access the diverter valve on my GE dishwasher?

First, disconnect power to the dishwasher. Then, remove the lower spray arm and any filters. The diverter valve is typically located beneath the filter assembly. You may need to remove some screws or clips to access it.

•What should the water pressure be to my GE dishwasher?

The minimum water pressure for most GE dishwashers is 20 PSI. Lower water pressure can affect the performance of the spray arms and cleaning ability.

•How do I test the circulation pump?

Disconnect power to the dishwasher. Locate the circulation pump (usually at the bottom of the dishwasher). Use a multimeter to check for continuity across the pump motor terminals. If there is no continuity, the motor is likely defective. Also, check for 120V AC at the pump terminals when the dishwasher is running (use extreme caution).

GE Dishwasher Top Spray Arm Not Getting Water: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the diverter valve on my GE dishwasher?

•What should the water pressure be to my GE dishwasher?

•How do I test the circulation pump?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: