Whirlpool Dishwasher Not Draining: Clogged Garbage... | appliancefaults.com

Technical Background:

The dishwasher's Main Control Unit (MCU) initiates the drain cycle, sending 120V AC to the drain pump. If the pump doesn't detect a change in water level within a specific timeframe (monitored by a pressure sensor or float switch), it may trigger an error. A clogged garbage disposal creates backpressure, preventing the pump from effectively removing the water.

Symptoms:

The Whirlpool dishwasher runs its cycle, but water remains in the bottom of the tub. The dishwasher may display an error code related to draining, or it may simply stop and beep.

Possible Causes:

Clogged garbage disposal preventing dishwasher drain.
Air gap clogged.
Drain hose kinked or obstructed.
Dishwasher drain pump failure.
Drain solenoid malfunction.

Solution:

1

Unplug the dishwasher or turn off the breaker at the breaker panel. LOTO is critical.
2

Turn off power to the garbage disposal at the breaker panel.
3

Clear the garbage disposal. Remove any visible obstructions. Use tongs or pliers.
4

Reset the garbage disposal by pressing the reset button, usually located on the bottom of the unit. Then test the disposal.
5

Disconnect the dishwasher drain hose from the garbage disposal. Inspect the hose for kinks or clogs. Flush it out.
6

Check the air gap (if installed) for clogs. Clean with a pipe cleaner or small brush.
7

Reconnect the drain hose. Restore power to both the dishwasher and garbage disposal. Run the dishwasher and observe draining.

Safety Warning:

Always disconnect power before working on appliances. Dishwashers operate on 120V AC, which can cause serious injury or death. Use proper Lock Out/Tag Out (LOTO) procedures when disconnecting power.

Prevention:

Run the garbage disposal regularly to prevent food buildup. Avoid putting large quantities of food scraps down the disposal at once. Periodically flush the dishwasher drain hose with hot water and vinegar.

Expert Tip:

If the dishwasher continues to have draining issues after clearing the disposal, try running the diagnostics cycle. On many Whirlpool models, this is activated by pressing and holding two buttons simultaneously (like 'High Temp Wash' and 'Heated Dry') for 3 seconds. Consult the service manual for your specific model.

Frequently Asked Questions

•How do I access the drain pump on my Whirlpool dishwasher?

Accessing the drain pump typically involves removing the lower access panel (held in place by screws, often using a 1/4-inch nut driver) and then potentially disconnecting some plumbing to reach the pump. Always disconnect power first.

•What is the proper way to clean a dishwasher air gap?

The air gap is usually a small chrome or plastic cylinder located near the sink. Unscrew the top cap and remove any debris. You can use a pipe cleaner or small brush to clear any blockages. Flush with water to ensure it's clear.

•How do I test the dishwasher drain pump for continuity?

Disconnect power to the dishwasher. Locate the drain pump and disconnect the wires. Use a multimeter set to ohms (resistance). Place the probes on the pump terminals. A reading between 10-30 ohms typically indicates a functioning pump. An open circuit (infinite resistance) indicates a failed pump.

Whirlpool Dishwasher Not Draining: Clogged Garbage Disposal Fix

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the drain pump on my Whirlpool dishwasher?

•What is the proper way to clean a dishwasher air gap?

•How do I test the dishwasher drain pump for continuity?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: