Amana Dishwasher Error Code 8-2: Drain Pump Electrical... | appliancefaults.com

Technical Background:

The dishwasher's main control unit (MCU) monitors the drain pump's electrical current draw. error code 8-2 is triggered when the MCU detects an abnormal current, indicating a potential electrical fault within the drain pump circuit. This could stem from a shorted winding, open circuit, or excessive resistance caused by a blockage. Voltage is supplied to the drain pump via a relay on the control board.

Symptoms:

The Amana dishwasher displays error code 8-2 and fails to drain water after a wash cycle. You may hear a humming sound, or no sound at all, coming from the drain pump area.

Possible Causes:

Blocked drain hose
Faulty drain pump motor
Wiring harness issue to drain pump
Failed drain pump relay on the control board
Obstruction in the drain pump impeller
Short circuit in the drain pump winding

Solution:

1

Disconnect power to the dishwasher at the breaker panel.
2

Inspect the drain hose for kinks or clogs. Remove the hose from the drain pump and clear any obstructions.
3

Disconnect the wiring harness from the drain pump.
4

Using a multimeter, check the drain pump winding for continuity. A reading of infinite resistance (open circuit) indicates a faulty pump. A typical resistance reading is between 10-30 Ohms.
5

Check the voltage to the drain pump during the drain cycle (approximately 120V AC). If no voltage is present, the control board or wiring is likely faulty.
6

If voltage is present and the pump is not running, replace the drain pump.
7

Reassemble the dishwasher and restore power. Run a test cycle to confirm the repair.

Safety Warning:

Always disconnect power to the dishwasher at the breaker panel before performing any repairs. High voltage is present when the dishwasher is powered on. Use caution when testing electrical components.

Prevention:

Regularly check and clean the dishwasher's drain filter to prevent debris from entering the drain pump. Avoid using excessive amounts of detergent, which can contribute to clogs.

Expert Tip:

To enter service mode on some Amana dishwashers, press and hold the 'High Temp' and 'Heated Dry' buttons simultaneously for 3 seconds. This will allow you to run diagnostic cycles and test individual components, including the drain pump.

Frequently Asked Questions

•What is the typical resistance reading of a functional Amana dishwasher drain pump motor?

A typical resistance reading for a functional Amana dishwasher drain pump motor is between 10 and 30 Ohms. An open circuit (infinite resistance) indicates a faulty motor.

•How do I access the drain pump on an Amana dishwasher?

Generally, you access the drain pump by removing the lower access panel and toe kick. You may need to disconnect the water supply and drain lines first. Be sure to disconnect power at the breaker panel before starting.

•If the drain pump is receiving 120V AC, but the dishwasher still displays error code 8-2 after replacing the drain pump, what else could be the problem?

If the drain pump is receiving proper voltage and a new pump doesn't resolve the issue, the problem likely lies with the main control board. The board might not be correctly sensing the current draw or may have a faulty drain pump relay. Consider replacing the main control board.

Amana Dishwasher Error Code 8-2: Drain Pump Electrical Fault Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical resistance reading of a functional Amana dishwasher drain pump motor?

•How do I access the drain pump on an Amana dishwasher?

•If the drain pump is receiving 120V AC, but the dishwasher still displays error code 8-2 after replacing the drain pump, what else could be the problem?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: