Amana Washer Error Code Sud: Excess Suds Troubleshooting... | appliancefaults.com

Technical Background:

The washer's main control unit (MCU) monitors the pressure switch or sensor to detect water levels and suds. If the MCU detects a higher-than-normal pressure or resistance due to excessive suds, it triggers the 'Sud' error code. The voltage path typically involves a 5V DC signal to the pressure switch/sensor, and a return voltage that varies depending on the pressure. The MCU interprets this voltage to determine the water level and presence of excessive suds.

Symptoms:

The homeowner reports that the washer displays the 'Sud' error code during the wash or rinse cycle. The washer may stop mid-cycle and not drain properly. Excessive suds are visible in the wash tub.

Possible Causes:

Excessive detergent usage
Incorrect detergent type (non-HE)
Drain hose blockage or restriction
Faulty pressure switch or sensor
Defective water inlet valve
Control board malfunction

Solution:

1

Disconnect the washer from the power outlet.
2

Inspect the drain hose for kinks, clogs, or restrictions. Remove any obstructions.
3

Check the drain pump filter for debris. Clean if necessary.
4

Test the pressure switch with a multimeter. It should have continuity when the tub is empty and open circuit when the tub is full. Replace if faulty.
5

Examine the water inlet valve for proper operation. Use a multimeter to check the coil resistance (typically around 1-2 kOhms). Replace if faulty.
6

Run a cleaning cycle with a washing machine cleaner to remove excess suds and detergent residue.
7

If the problem persists, the control board might be defective. Replace the control board as a last resort.

Safety Warning:

Always disconnect the washer from the power outlet before performing any repairs. Lock Out/Tag Out (LOTO) procedures should be followed. The appliance operates on 120V AC, which can cause electric shock.

Prevention:

Always use HE (High Efficiency) detergent. Measure detergent carefully according to the manufacturer's instructions, and use less detergent if you have soft water. Regularly clean the drain pump filter.

Expert Tip:

Some Amana washers have a service mode that allows you to run diagnostic tests and clear error codes. To enter service mode, simultaneously press and hold the Start/Pause and Cycle Signal buttons for 3 seconds. Refer to the service manual for specific test procedures.

Frequently Asked Questions

•How do I access the drain pump filter on my Amana washer?

The drain pump filter is typically located behind an access panel at the bottom front of the washer. You may need a flathead screwdriver to open the panel. Place a shallow pan under the access panel to catch any water that may spill out when you remove the filter.

•What is HE detergent, and why is it important to use in my Amana washer?

HE detergent is specifically formulated for high-efficiency washing machines. It produces fewer suds than regular detergent, which prevents excessive suds buildup that can interfere with the washer's operation and cause error codes like 'Sud'. Using non-HE detergent can also damage the washer over time.

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

First, disconnect the washer from power and locate the pressure switch. Disconnect the wires from the switch. Set your multimeter to the continuity setting. With the tub empty, there should be continuity between the two terminals on the switch. With the tub full (you can simulate this by blowing air into the pressure switch hose), there should be an open circuit.

Amana Washer Error Code Sud: Excess Suds Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the drain pump filter on my Amana washer?

•What is HE detergent, and why is it important to use in my Amana washer?

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

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: