Frigidaire Washer Error Code E21: Drain Pump Failure... | appliancefaults.com

Technical Background:

The MCU (Main Control Unit) controls the drain pump by sending 120V AC to the pump motor during the drain cycle. The MCU relies on signals from the pressure switch to determine the water level. If the pressure switch malfunctions or the wiring is faulty, the MCU might not initiate the drain cycle, leading to the E21 error.

Symptoms:

The Frigidaire washer displays error code E21. The washer does not drain water, leaving clothes soaked after the wash cycle. You may hear a humming noise coming from the pump area, or no noise at all.

Possible Causes:

Blocked drain pump filter
Defective drain pump motor
Wiring harness issue between MCU and drain pump
Faulty pressure switch
Clogged drain hose

Solution:

1

Unplug the washer from the 120V AC outlet.
2

Access the drain pump (usually located at the bottom front or rear of the washer). You may need a 1/4-inch nut driver to remove access panels.
3

Inspect and clean the drain pump filter for any obstructions. A common blockage is lint, hair, or small objects.
4

Disconnect the wiring harness from the drain pump and use a multimeter to check for 120V AC when the washer is in the drain cycle. Set the multimeter to AC voltage mode.
5

If voltage is present but the pump isn't running, replace the drain pump. Common pumps require a 5/16-inch socket for removal.
6

If no voltage is present, inspect the wiring harness for damage or loose connections. Trace the wiring back to the main control unit (MCU).
7

Check the pressure switch for proper operation. A faulty pressure switch can prevent the drain cycle from starting.

Safety Warning:

Always disconnect the washer from the power source (unplug it) before performing any repairs. High voltage is present inside the washer. Use Lock-Out/Tag-Out (LOTO) procedures to ensure the washer remains de-energized during the repair process.

Prevention:

Regularly clean the drain pump filter every 3 months. Avoid overloading the washer to prevent excessive lint buildup. Inspect the drain hose for kinks or clogs annually.

Expert Tip:

Many Frigidaire washers have a diagnostic mode. Press and hold the Start/Pause and Cancel buttons simultaneously for 3 seconds to enter the diagnostic mode. This mode can provide more specific error codes and allow you to test individual components like the drain pump.

Frequently Asked Questions

•How do I access the drain pump on my specific Frigidaire washer model?

The location of the drain pump varies depending on the specific model. Consult your washer's service manual or search online using your model number for detailed instructions and diagrams. Typically, you'll need to remove an access panel at the bottom front or rear of the washer.

•What voltage should I expect to see at the drain pump connector during the drain cycle?

You should expect to see approximately 120V AC at the drain pump connector when the washer is actively trying to drain. If you measure significantly less than this, there may be a wiring or MCU issue.

•How do I test the pressure switch to see if it is faulty?

You can test the pressure switch using a multimeter set to continuity. Disconnect the switch and blow into the pressure tube. Check for continuity between the terminals. If the continuity doesn't change when you blow into the tube, the pressure switch is likely faulty.

Frigidaire Washer Error Code E21: Drain Pump Failure Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the drain pump on my specific Frigidaire washer model?

•What voltage should I expect to see at the drain pump connector during the drain cycle?

•How do I test the pressure switch to see if it is faulty?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: