Whirlpool WFW5620HW IntelliFill Water Level Sensor... | appliancefaults.com

Technical Background:

The "IntelliFill" system uses a pressure sensor to detect the water level inside the wash tub. The sensor sends a voltage signal to the MCU, which then controls the water inlet valve. The MCU relies on accurate sensor readings to determine when to open and close the valve. Changes in pressure within the tub are transmitted through the air-filled hose to the sensor, causing corresponding voltage changes interpreted by the MCU. Issues arise when the hose is obstructed or the sensor voltage range falls outside normal operating parameters.

Symptoms:

The washing machine overfills, underfills, or does not fill at all. The "IntelliFill" feature may not be functioning correctly. You might also see excessive suds or poor wash performance due to incorrect water levels.

Possible Causes:

Faulty water level pressure sensor.
Air leak in the pressure hose.
Clogged or kinked pressure hose.
Defective MCU (Main Control Unit).
Incorrect calibration settings within the MCU.
Wiring harness damage to the pressure sensor or MCU.

Solution:

1

Disconnect power to the washing machine at the breaker panel.
2

Locate the water level pressure sensor. It's typically near the bottom of the machine and connected to a small hose.
3

Check the pressure hose for kinks, clogs, or leaks. Disconnect the hose from both the sensor and the tub, and blow through it to verify it is clear.
4

Reconnect the hose and ensure it is securely attached to both the sensor and the tub.
5

Consult the service manual for the WFW5620HW and locate the procedure to enter service mode. This often involves pressing a specific sequence of buttons on the control panel.
6

Once in service mode, navigate to the water level sensor calibration option. Follow the on-screen prompts to calibrate the sensor.
7

If calibration fails or the problem persists, suspect a faulty water level pressure sensor or a defective MCU.

Safety Warning:

Disconnect the power supply to the washing machine before performing any troubleshooting or repairs. Lockout/Tagout (LOTO) procedures should be followed. Some components may retain a high voltage even after the machine is unplugged. Exercise caution when working near electrical components.

Prevention:

Regularly inspect the pressure hose for any signs of damage or wear. Avoid using excessive amounts of detergent, which can lead to suds buildup and potential clogging of the pressure hose.

Expert Tip:

A common trick is to use a small vacuum to gently pull air through the pressure hose. This can sometimes dislodge minor clogs without disconnecting the hose. To enter service mode on many Whirlpool washers, try pressing the following sequence: POWER, TEMP, SPIN, SOIL LEVEL, POWER.

Frequently Asked Questions

•How do I test the water level pressure sensor with a multimeter?

Disconnect the sensor and use a multimeter to measure the resistance across its terminals. Consult the service manual for the correct resistance range at different pressure levels. Blow gently into the sensor hose and observe the resistance change.

•Where can I find the service manual for the Whirlpool WFW5620HW?

You can usually find it online at appliancepartspros.com or searspartsdirect.com. You might have to pay a small fee for access to the manual.

•What is the part number for the water level pressure sensor on the WFW5620HW?

While it's best to confirm with your model number, a common part number for similar Whirlpool washers is W10843717. Always double-check compatibility.

Whirlpool WFW5620HW IntelliFill Water Level Sensor Calibration Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I test the water level pressure sensor with a multimeter?

•Where can I find the service manual for the Whirlpool WFW5620HW?

•What is the part number for the water level pressure sensor on the WFW5620HW?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: