Whirlpool TruCool Humidity Control: Crispers Too Wet... | appliancefaults.com

Technical Background:

The Whirlpool TruCool system utilizes a humidity sensor to monitor the moisture levels within the crisper drawers. The Main Control Unit (MCU) receives this data and adjusts the position of a flapper valve via a small DC motor. This valve regulates airflow between the crisper drawers and the rest of the refrigerator compartment, controlling the humidity level. Voltage paths for the motor are typically 5V DC.

Symptoms:

The crisper drawers in your Whirlpool TruCool refrigerator are excessively wet, leading to premature spoilage of fruits and vegetables. There may be visible condensation inside the drawers, even with the humidity control set to its lowest setting.

Possible Causes:

Faulty humidity control flapper motor.
Damaged humidity control gasket.
Defective humidity sensor.
Blocked crisper drawer vents.
Incorrect refrigerator temperature setting.
Defective MCU.

Solution:

1

Unplug the refrigerator from the 120V AC outlet.
2

Locate the humidity control assembly (usually near the crisper drawers). This may involve removing the crisper drawers and any associated trim panels using a 1/4-inch nut driver.
3

Inspect the flapper motor for physical damage and test its continuity with a multimeter. A reading of OL indicates an open circuit.
4

Check the humidity control gasket for tears or damage. Replace if necessary.
5

Verify the humidity sensor's resistance using a multimeter and compare it to the manufacturer's specifications at room temperature (typically around 75°F). A significant deviation indicates a faulty sensor.
6

Clear any obstructions from the crisper drawer vents using a small brush or vacuum.
7

Ensure the refrigerator temperature is set to the manufacturer's recommended setting (usually between 37°F and 40°F).

Safety Warning:

Disconnect power to the appliance before performing any repairs. Some components may retain an electrical charge even after the appliance is unplugged. Use caution when working with electrical components.

Prevention:

Regularly clean the crisper drawers and check for any obstructions in the vents. Inspect the humidity control gasket periodically for wear and tear and replace it as needed. Avoid overfilling the crisper drawers, as this can restrict airflow.

Expert Tip:

Whirlpool refrigerators often have a service mode that allows you to manually test the humidity control motor. To access the service mode, press and hold the 'Door Alarm' and 'Light' buttons simultaneously for 5 seconds. Navigate through the menu to find the humidity control test. This bypasses the sensor and runs the motor directly. Listen for the motor to activate.

Follow-up Questions:

Frequently Asked Questions

•How do I find the manufacturer's specifications for the humidity sensor resistance?

The manufacturer's specifications for the humidity sensor resistance are typically found in the refrigerator's service manual or on the manufacturer's website. You can search online using the model number of your refrigerator and the term 'service manual' or 'technical data sheet'.

•What is the typical cost to replace a humidity control motor?

The cost to replace a humidity control motor can vary depending on the model and the supplier. Generally, the part itself costs between $50 and $150. Labor costs can range from $75 to $150 per hour, so the total cost could be between $125 and $300 if you hire a professional.

•If the humidity sensor is reading correctly, what else could be causing the high humidity?

If the humidity sensor is reading correctly and the motor is functioning, the problem might stem from a defrost issue. Excessive ice buildup in the evaporator coils can raise the refrigerator's overall humidity. Check the defrost heater, defrost thermostat, and defrost timer for proper operation.

Whirlpool TruCool Humidity Control: Crispers Too Wet Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I find the manufacturer's specifications for the humidity sensor resistance?

•What is the typical cost to replace a humidity control motor?

•If the humidity sensor is reading correctly, what else could be causing the high humidity?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: