Whirlpool Dishwasher Not Draining, Water Standing, and... | appliancefaults.com

Technical Background:

The dishwasher's main control unit (MCU) relies on a stable 120V AC power supply to operate. The MCU controls the drain pump, monitors the door switch, and interprets signals from the float switch. A loss of power, a faulty door switch, or a malfunctioning MCU can prevent the dishwasher from draining and result in a blank display.

Symptoms:

The Whirlpool dishwasher has standing water at the bottom of the tub, and the display is completely blank. The dishwasher is not responding to any button presses.

Possible Causes:

Power supply issue
Faulty door switch
Clogged drain pump or hose
Failed control board (MCU)
Float switch malfunction

Solution:

1

Verify power to the dishwasher receptacle with a multimeter. You should read approximately 120V AC. If there's no power, check the breaker.
2

Go to the breaker panel. Look for a tripped breaker supplying power to the dishwasher. Reset the breaker.
3

Check the door switch. Open the dishwasher door and locate the door switch. Using a multimeter, test for continuity when the door is closed. If the switch is open, replace it.
4

Remove the lower access panel. Inspect the drain pump for any visible obstructions. Disconnect the drain hose from the pump and check for clogs. Remove any debris.
5

Disconnect the power supply to the dishwasher at the breaker panel. Examine the control board for burned or damaged components. Check for loose connections. If the board is visibly damaged, replace it.
6

Locate the float switch assembly inside the dishwasher. If the float is stuck in the up position, manually lower it. Test the float switch for continuity when the float is in the down position. Replace the float switch if faulty.
7

If the problem persists after checking the above, consult with a qualified appliance repair technician.

Safety Warning:

Disconnect power to the dishwasher at the breaker panel before performing any repairs. Use Lock-Out Tag-Out (LOTO) procedures. Dishwashers operate with 120V AC, which can cause serious injury or death.

Prevention:

Periodically clean the dishwasher filter and run a dishwasher cleaner to prevent clogs. Avoid overloading the dishwasher, as this can put a strain on the drain pump. Inspect the drain hose regularly for kinks or damage.

Expert Tip:

To access the diagnostic mode on some Whirlpool dishwashers, press the following sequence: High Temp Scrub, Heated Dry, High Temp Scrub, Heated Dry. This may reveal error codes to aid in troubleshooting.

Frequently Asked Questions

•Where is the drain pump located in my Whirlpool dishwasher?

The drain pump is typically located at the bottom of the dishwasher, behind the lower access panel. You may need to remove a few screws to access it.

•How do I test the door switch with a multimeter?

Disconnect power to the dishwasher. Set your multimeter to the continuity setting. Place the probes on the terminals of the door switch. With the door closed, you should have continuity. With the door open, you should have no continuity.

•Where can I find replacement parts for my Whirlpool dishwasher?

You can find replacement parts at most major appliance parts retailers, both online and in brick-and-mortar stores. Be sure to have your dishwasher's model number handy to ensure you get the correct parts.

Whirlpool Dishwasher Not Draining, Water Standing, and Blank Display: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Where is the drain pump located in my Whirlpool dishwasher?

•How do I test the door switch with a multimeter?

•Where can I find replacement parts for my Whirlpool dishwasher?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: