Maytag Dishwasher Spray Arms Not Spinning or Blocked:... | appliancefaults.com

Technical Background:

The Main Control Unit (MCU) controls the wash pump motor and diverter motor (if equipped). The MCU sends a 120V AC signal to these components. The MCU relies on feedback from sensors (water level, temperature) to determine the proper operation of the wash cycle. If sensors report abnormal conditions, the MCU may reduce power to the spray arms or halt the cycle.

Symptoms:

US homeowner reports that the dishes are not getting clean, especially on the upper rack. They observe that the spray arms are not spinning or are spinning very slowly.

Possible Causes:

Blocked spray arm nozzles with food debris.
Low water pressure from the supply line.
Malfunctioning wash pump motor.
Defective diverter motor (if applicable).
Clogged filter or sump area.

Solution:

1

Disconnect power to the dishwasher at the breaker panel. LOTO (Lock Out/Tag Out) procedure required.
2

Inspect the upper and lower spray arms. Remove them and thoroughly clean all nozzles with a small brush or wire. A toothpick can also be helpful.
3

Check the water inlet valve screen for debris. Clean if necessary.
4

Verify water pressure at the supply line. It should be at least 20 PSI. Use a water pressure gauge attached to the supply line.
5

Examine the filter and sump area at the bottom of the dishwasher. Remove any food particles or obstructions. Use a wet/dry vacuum to remove debris.
6

If the issue persists, use a multimeter to test the wash pump motor windings for continuity. Replace if necessary (consult a qualified technician).
7

If equipped with a diverter motor, test for 120V AC at the motor during the wash cycle. Replace the diverter motor if voltage is present but the motor does not operate.

Safety Warning:

Disconnect power to the dishwasher at the breaker panel before performing any repairs. This appliance operates at 120V AC, which can cause serious injury or death. Follow LOTO procedures!

Prevention:

Regularly clean the dishwasher filter and spray arms. Run a dishwasher cleaner monthly to prevent buildup. Ensure adequate water pressure to the dishwasher.

Expert Tip:

Many Maytag dishwashers have a service mode. To access it, simultaneously press and hold the 'Start/Cancel' and 'Heated Dry' buttons for 3 seconds. This allows you to run diagnostic cycles and check error codes (if any).

Frequently Asked Questions

•How do I remove the spray arms from my Maytag dishwasher?

Most Maytag dishwashers have spray arms that twist off. The lower spray arm typically pulls straight up, while the upper spray arm may require a counter-clockwise twist to release.

•Where is the water inlet valve screen located?

The water inlet valve screen is located where the water supply line connects to the dishwasher, typically at the bottom-left or bottom-right of the unit. Disconnect the water supply and carefully remove the screen for cleaning.

•What is a diverter motor, and how do I know if my dishwasher has one?

A diverter motor is used in some dishwashers to direct water flow to different spray arms or zones during the wash cycle. If your dishwasher has multiple wash cycles with varying spray arm patterns, it likely has a diverter motor. You can typically locate it near the wash pump assembly.

Maytag Dishwasher Spray Arms Not Spinning or Blocked: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I remove the spray arms from my Maytag dishwasher?

•Where is the water inlet valve screen located?

•What is a diverter motor, and how do I know if my dishwasher has one?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: