Hotpoint Washer Sensing for 20 Minutes and Stopping:... | appliancefaults.com

Technical Background:

Modern washing machines use a microcontroller unit (MCU) to control all functions. During the sensing phase, the MCU reads data from the load sensor, pressure switch, and sometimes the motor to determine the load size and water level. If any of these sensors provide incorrect or inconsistent data, the MCU may get stuck in the sensing loop. Voltage paths for the sensors must be complete and within expected ranges for proper operation.

Symptoms:

The Hotpoint washer fills with water, attempts to sense the load for an extended period (around 20 minutes), and then stops without ever starting the wash cycle. The display may or may not show an error code. The user reports that the clothes remain wet, and the cycle never progresses.

Possible Causes:

Faulty load sensor
Clogged drain pump filter
Defective pressure switch
Problem with the motor control unit (MCU)
Wiring harness issue between components

Solution:

1

Unplug the washer from the outlet.
2

Check the drain pump filter for obstructions. Remove the filter (usually located behind a small access panel at the bottom front of the machine) and clean it thoroughly.
3

Inspect the pressure switch hose for kinks or clogs. This hose connects the pressure switch to the tub. Clear any obstructions.
4

Verify the load sensor is functioning correctly. Use a multimeter to check for continuity. Consult the service manual for the proper resistance values.
5

Examine the wiring harness for any loose connections or damaged wires. Pay close attention to the connections at the MCU and motor.
6

If the issue persists, replace the load sensor. It's a relatively inexpensive part to replace and can often resolve sensing problems.
7

As a last resort, replace the MCU. This is a more costly repair, so ensure all other possibilities have been exhausted.

Safety Warning:

Always disconnect power to the appliance before performing any repairs. Capacitors in the MCU can hold a charge even after the power is disconnected. Discharge capacitors before handling the board. Observe Lock-Out/Tag-Out (LOTO) procedures.

Prevention:

Regularly clean the drain pump filter to prevent clogs. Avoid overloading the washer, as this can strain the load sensor and other components. Use the correct amount of detergent, as excessive detergent can lead to buildup and affect sensor accuracy.

Expert Tip:

Many Hotpoint washers have a diagnostic mode. To enter it, simultaneously press and hold the Start/Pause and Cycle Select buttons for 3 seconds. The control panel will light up, and you can then cycle through diagnostic codes using the Cycle Select button. Refer to the service manual for a list of codes.

Frequently Asked Questions

•Where is the load sensor located on my Hotpoint washer?

The load sensor is typically located at the bottom of the wash tub, often near the motor. It may be integrated into the motor assembly or mounted separately on the tub.

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

Disconnect the pressure switch and set your multimeter to the continuity setting. Blow gently into the pressure switch tube. You should hear a click, and the multimeter should show continuity. No continuity indicates a faulty switch.

•What voltage should I expect to see at the motor connector?

You should see 120V AC at the motor connector when the washer is attempting to start. If there is no voltage, check the wiring harness and the MCU for any issues.

Hotpoint Washer Sensing for 20 Minutes and Stopping: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Where is the load sensor located on my Hotpoint washer?

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

•What voltage should I expect to see at the motor connector?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: