HUM
Whirlpool Refrigerator
Severity: MinorWhat Does This Error Mean?
The HUM error on a Whirlpool refrigerator means the humidity sensor in the fresh food compartment has detected an unusual condition or has a fault. Some models use this code when the crisper drawer humidity control is set to an extreme position. The fridge continues to operate normally, but the humidity-controlled crisper drawers may not function as designed.
Affected Models
- WRF535SWHZ
- WRF767SDEM
- WRS571CIHZ
- WRF560SEHZ
- Whirlpool models with humidity-controlled crisper drawers
Common Causes
- The humidity sensor in the crisper zone has failed or drifted out of calibration
- The crisper drawer humidity slider has been moved to an extreme position
- The crisper drawer is not fully closed, affecting humidity readings
- Moisture from wet vegetables or fruits is pooling in the drawer and affecting the sensor
- A communication fault between the humidity sensor and the main control board
How to Fix It
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Make sure all crisper drawers are fully closed.
A partially open drawer affects humidity readings. Push each drawer in firmly until it seats fully.
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Check the humidity control sliders on the crisper drawers.
Slide them to the middle position. Extreme settings can sometimes confuse the humidity sensor.
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Remove the contents of the crisper drawers and wipe the drawers dry.
Excess moisture from wet vegetables can pool at the bottom and affect sensor readings.
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Unplug the refrigerator for 5 minutes, then plug it back in.
A power reset clears temporary sensor errors and re-initializes the humidity control system.
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Replace the drawers and monitor for 24 hours.
If HUM does not return, the issue was likely a temporary moisture event. If it returns, the sensor needs professional inspection.
When to Call a Professional
If a reset and drawer inspection don't clear HUM, the humidity sensor may need replacement. This is usually built into the crisper drawer assembly or the fresh food section liner. A technician can replace the sensor for $100–$200 including parts and labor.
Frequently Asked Questions
Does the HUM error affect food storage?
Yes — if the humidity sensor is faulty, the crisper drawers cannot maintain the right humidity level. High humidity settings are meant for leafy vegetables. Low humidity settings are for fruits. A faulty sensor means these settings may not work correctly, which can affect how long produce stays fresh.
What is the ideal humidity setting for crisper drawers?
For leafy greens and herbs, set the slider to high humidity. For fruits and vegetables that produce ethylene gas (apples, pears, grapes), set it to low humidity. A simple rule: leaves and stems = high humidity, fruits = low humidity.
Can moisture from food damage the humidity sensor?
In extreme cases, yes. If water pools in the crisper drawer and soaks the sensor area repeatedly over time, it can corrode the sensor contacts. Always dry wet vegetables before storing them and wipe out drawers when you notice condensation buildup.