Maytag Washer Stuck on "Sensing": Troubleshooting Guide... | appliancefaults.com

Technical Background:

The Main Control Unit (MCU) utilizes input from various sensors, including the pressure sensor, to determine water levels and other operating parameters. The MCU controls voltage paths to the water inlet valve, drain pump, and motor. An incorrect reading or a malfunction in any of these components can cause the MCU to incorrectly display the 'Sensing' light.

Symptoms:

US homeowner observes that their Maytag washing machine displays the 'Sensing' light even after the wash cycle has completed. The washer appears to be stuck in the sensing mode and is not progressing to the next cycle or shutting off.

Possible Causes:

Faulty pressure sensor
Defective water inlet valve
Wiring harness issue between the MCU and components
Drain pump malfunction
Software glitch in the main control unit (MCU)
Clogged drain hose or air dome

Solution:

1

Unplug the washer from the 120V AC outlet.
2

Disconnect the pressure sensor and test for continuity. A faulty sensor needs replacement.
3

Check the water inlet valve for proper operation. Use a multimeter to check for 120V AC when the valve should be open. If no voltage is present, suspect the MCU.
4

Inspect the wiring harness and connectors for any signs of damage or corrosion. Repair or replace as needed.
5

Test the drain pump for proper operation. Ensure the pump is receiving 120V AC during the drain cycle.
6

Inspect the drain hose for clogs. A blockage can cause the 'Sensing' light to remain on.
7

Check the air dome for blockages. The air dome helps the pressure sensor to function correctly.

Safety Warning:

Always disconnect the power supply to the appliance before performing any repairs. Lock Out/Tag Out (LOTO) procedures should be followed to ensure the appliance cannot be accidentally powered on during servicing. High voltage components are present; exercise caution.

Prevention:

Regularly inspect and clean the drain hose and lint filter. Periodically check the water inlet hoses for leaks and replace them if necessary. Use the correct amount of HE (High Efficiency) detergent to prevent excessive suds, which can interfere with the pressure sensor readings.

Expert Tip:

Try entering the diagnostic mode to clear any error codes and potentially reset the MCU. The sequence is often specific to the Maytag model but generally involves pressing a combination of buttons (e.g., Start/Pause, then one or two other buttons repeatedly) within a short timeframe. Check the tech sheet for the precise sequence for your model.

Frequently Asked Questions

•Where is the pressure sensor located on my Maytag washer?

The pressure sensor is typically located near the bottom of the washer cabinet, often connected to the tub via a small hose. Consult your washer's service manual or parts diagram for the exact location.

•How do I enter the diagnostic mode on my specific Maytag washer model?

The diagnostic mode entry sequence varies depending on the specific model. Consult your washer's service manual or the tech sheet located inside the washer cabinet. It usually involves a combination of button presses.

•What voltage readings should I expect to see at the water inlet valve when it's supposed to be open?

You should expect to see approximately 120V AC at the water inlet valve when it's commanded to open. Use a multimeter to verify the voltage.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Where is the pressure sensor located on my Maytag washer?

•How do I enter the diagnostic mode on my specific Maytag washer model?

•What voltage readings should I expect to see at the water inlet valve when it's supposed to be open?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: