Maytag Washer Sensing Light Stays On After Cycle:... | appliancefaults.com

Technical Background:

The washer's Main Control Unit (MCU) uses signals from the pressure switch/sensor to determine the water level. The MCU sends a low voltage signal (typically 5V DC) to the sensor, and the sensor returns a varying voltage based on the water pressure. A fault in this circuit, either due to a bad sensor, wiring problem, or MCU failure, can cause the 'Sensing' light to remain on.

Symptoms:

The Maytag washer completes its wash cycle, but the 'Sensing' light remains illuminated. The washer may or may not continue to attempt to sense the water level even though the cycle is finished. The door may remain locked.

Possible Causes:

Faulty pressure switch or sensor.
Defective water level sensor.
Wiring harness issue between the control board and the sensors.
Drain pump malfunction hindering proper water level detection.
Main Control Unit (MCU) failure.
Software glitch in the MCU.

Solution:

1

Disconnect power to the washer at the breaker panel. LOTO (Lock Out, Tag Out).
2

Access the pressure switch/sensor (usually located near the bottom of the washer). Use a 1/4-inch nut driver.
3

Inspect the wiring harness connected to the pressure switch for any damage or loose connections.
4

Check the pressure switch with a multimeter for continuity. Compare readings to the manufacturer's specifications. Replace if faulty.
5

Inspect the drain pump for blockages. A partially blocked pump can prevent accurate water level sensing. Use a 5/16-inch socket to remove and inspect.
6

If the wiring and sensors are good, the main control board (MCU) might be faulty. Replacement may be necessary.
7

After repairs, reconnect power and run a test cycle. Monitor for proper water level and the 'Sensing' light behavior.

Safety Warning:

Disconnect power to the appliance at the breaker before performing any troubleshooting or repairs. Washing machines operate on 120V AC, which can cause serious injury or death. Lock Out, Tag Out (LOTO) procedures are essential.

Prevention:

Regularly clean the drain pump filter to prevent clogs. Avoid overloading the washer, as this can strain the drain pump and potentially damage the pressure sensor.

Expert Tip:

Some Maytag washers have a diagnostic mode. Consult the service manual to access the diagnostic mode and retrieve any error codes that may be stored. This can help pinpoint the exact cause of the 'Sensing' light issue. Often you can press and hold the start/pause button and power button for 3 seconds to initiate the service mode.

Frequently Asked Questions

•What is the typical resistance range I should see on a working pressure switch?

The resistance range varies by model, but typically you'll see between 1k Ohm and 5k Ohm at rest. Refer to the specific service manual for your washer model.

•How do I access the main control board on my Maytag washer?

The main control board is usually located behind the control panel or under the top panel of the washer. You'll likely need to remove a few screws to access it. Disconnect power first!

•If the drain pump is partially blocked, can it affect the sensing function even if it still drains the water eventually?

Yes, even a partial blockage can affect the sensing function. The MCU relies on consistent water level changes, and a slow drain can disrupt this process.

Maytag Washer Sensing Light Stays On After Cycle: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical resistance range I should see on a working pressure switch?

•How do I access the main control board on my Maytag washer?

•If the drain pump is partially blocked, can it affect the sensing function even if it still drains the water eventually?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: