Whirlpool Dishwasher Error Code F9 E1: Drain Pump... | appliancefaults.com

Technical Background:

The F9 E1 error code on a Whirlpool dishwasher indicates a drain pump motor failure. The Main Control Unit (MCU) monitors the drain pump's operation. If the MCU detects an issue such as the pump not running or drawing incorrect current, it triggers the F9 E1 error. The voltage path is from the breaker panel, through the door switches, to the control board, then to the drain pump relay, and finally to the drain pump motor itself.

Symptoms:

The dishwasher displays an F9 E1 error code. The dishwasher may not drain properly, leaving standing water in the tub after a cycle.

Possible Causes:

Clogged drain hose
Drain pump failure (motor winding open or shorted)
Blocked drain impeller
Obstruction in the drain sump area
Faulty drain pump relay on the control board

Solution:

1

Disconnect power to the dishwasher at the breaker panel.
2

Inspect the drain hose for kinks or obstructions. Remove and flush with hot water.
3

Access the drain pump (typically at the bottom of the dishwasher). Remove any visible debris from the pump impeller area.
4

Using a multimeter, check the drain pump motor windings for continuity. A typical resistance reading is between 10-30 ohms. An open or shorted reading indicates pump failure.
5

Verify 120V AC is reaching the drain pump connector during the drain cycle. Use a multimeter on the appropriate pins of the connector with the unit powered on and in a drain cycle. Be extremely cautious working with live voltage.
6

If voltage is present but the pump doesn't run and the pump tests good for continuity, suspect a control board issue. If voltage is absent, check the drain pump relay on the control board for proper operation or replace the control board.
7

Replace faulty components and reassemble. Run a test cycle.

Safety Warning:

Always disconnect power to the dishwasher at the breaker panel before performing any repairs. Lock Out/Tag Out (LOTO) procedures must be followed. High voltage is present when the dishwasher is powered on; exercise extreme caution when testing live circuits.

Prevention:

Regularly clean the dishwasher's filter and sump area to prevent debris buildup. Periodically check the drain hose for kinks or obstructions. Run a dishwasher cleaning cycle with a dishwasher cleaner monthly.

Expert Tip:

Enter service mode by pressing the following sequence within 6 seconds: High Temp Wash -> Heated Dry -> High Temp Wash -> Heated Dry. This allows you to manually activate the drain pump for testing purposes. Use the tech sheet located behind the lower access panel.

Frequently Asked Questions

•What is the proper resistance reading for the drain pump motor?

A typical resistance reading for a functioning drain pump motor is between 10 and 30 ohms. An open circuit (infinite resistance) or a very low resistance (close to zero) indicates a faulty motor.

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

Typically, you need to remove the lower access panel and the kick panel. The drain pump is usually located at the bottom of the dishwasher. You may need a 1/4-inch nut driver to remove screws and disconnect electrical connectors.

•If the drain pump tests good, what else could be causing the F9 E1 error?

If the drain pump tests good for continuity and voltage is reaching the pump during the drain cycle, the issue could be a faulty drain pump relay on the control board or a more significant problem with the control board itself. Replacement of the control board may be necessary.

Whirlpool Dishwasher Error Code F9 E1: Drain Pump Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the proper resistance reading for the drain pump motor?

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

•If the drain pump tests good, what else could be causing the F9 E1 error?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: