GE Washer Error Code 31: Pressure Sensor Fault... | appliancefaults.com

Technical Background:

The GE washer's main control unit (MCU) monitors the water level using a pressure sensor. The sensor detects the water pressure in the tub, sending a voltage signal back to the MCU. error code 31 indicates that the MCU is receiving an unexpected signal from the pressure sensor, or no signal at all. The MCU expects a linear voltage change with corresponding water level changes.

Symptoms:

The washer displays error code 31, and may not fill properly or may overfill. The machine might stop mid-cycle. You might also notice that the water level is incorrect for the selected load size.

Possible Causes:

Faulty pressure sensor
Blocked pressure hose
Loose wiring connection to the pressure sensor
Defective main control board (MCU)
Air leak in the pressure sensing system
Clogged drain pump causing back pressure

Solution:

1

Disconnect power to the washer at the breaker panel.
2

Locate the pressure sensor, typically found near the bottom of the outer tub. It often has a small hose connected to it.
3

Inspect the pressure hose for kinks, clogs, or damage. Remove the hose and blow through it to ensure it's clear.
4

Check the wiring harness and connector to the pressure sensor. Look for loose connections or corroded terminals. Use a multimeter to test for continuity.
5

Using a multimeter, test the pressure sensor. You should read approximately 5V DC between the power and ground wires. The signal wire voltage should change as you blow into the pressure hose. A healthy sensor should show a varying voltage, typically from 0.5V to 4.5V as pressure changes.
6

If the sensor is faulty or the hose is damaged, replace them.
7

Reconnect power to the washer and run a test cycle to verify the repair. If the problem persists, the main control board might be faulty and need replacement.

Safety Warning:

Always disconnect power to the appliance at the breaker panel before performing any repairs. Use proper lockout/tagout (LOTO) procedures to prevent accidental energization. Some components may retain a residual electrical charge, even after the power is disconnected.

Prevention:

Periodically inspect the pressure hose for kinks or damage. Ensure that the drain pump filter is cleaned regularly to prevent back pressure. Use the appropriate amount of detergent to avoid excessive suds, which can interfere with the pressure sensor.

Expert Tip:

Some GE washers have a service mode that allows you to manually test the pressure sensor and other components. Consult the service manual for your specific model for the procedure. A common sequence is pressing and holding the START and TEMP buttons simultaneously for 3 seconds to enter service mode.

Frequently Asked Questions

•What is the typical resistance value of a good pressure sensor?

The resistance value of the pressure sensor itself is less important than the voltage signal it outputs. You should be looking for a 0.5V to 4.5V DC change on the signal wire as you apply pressure to the sensor hose.

•How do I access the pressure sensor on my GE washer model?

On most GE front load washers, you need to remove the top panel and the front panel to access the pressure sensor. On top load models, it's usually accessible by removing the control panel and the top of the washer cabinet.

•What is the part number for a replacement pressure sensor for my GE washer?

To find the correct part number, you'll need the model number of your washer. You can then search for 'GE washer pressure sensor [your model number]' online or consult a parts distributor.

GE Washer Error Code 31: Pressure Sensor Fault Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical resistance value of a good pressure sensor?

•How do I access the pressure sensor on my GE washer model?

•What is the part number for a replacement pressure sensor for my GE washer?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: