S
Whirlpool Refrigerator
Severity: ModerateWhat Does This Error Mean?
The S error code on a Whirlpool refrigerator indicates that the refrigerator section is not reaching or maintaining the correct temperature. The control board has detected that the fresh food compartment is running too warm. This can be caused by a failed sensor, a blocked evaporator, poor door sealing, or a cooling system fault. Food safety is at risk if the S error is not addressed promptly.
Affected Models
- WRS325SDHZ
- WRT318FZDW
- WRB322DMBM
- WRF535SWHZ
- Common in Whirlpool top-freezer and bottom-freezer models
Common Causes
- Refrigerator compartment thermistor that has failed or is reading too high
- Blocked air vents between the freezer and fresh food section preventing cold air circulation
- Failed evaporator fan motor not circulating cold air into the refrigerator compartment
- Damaged door gasket allowing warm air infiltration and raising compartment temperature
- Frost-clogged evaporator coil blocking airflow due to a defrost system failure
How to Fix It
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Check that all air vents inside the refrigerator compartment are unobstructed. Rearrange any items blocking the vent openings.
Overpacked shelves near the back vents are a common cause of warm refrigerator sections.
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Check the door gasket for tears or gaps. Press the gasket firmly around the entire door and feel for air leaks.
A damaged gasket is inexpensive to replace and often the simple cause of a warm refrigerator compartment.
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Listen for the evaporator fan inside the fresh food section. You should hear a faint hum when the refrigerator is cooling.
If no fan sound is present, the evaporator fan motor may have failed. Remove the back wall panel inside the refrigerator to inspect it.
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Inspect the evaporator coil (behind the back wall panel in the freezer or fresh food section) for excessive frost buildup.
Heavy frost on the evaporator means the defrost system is not working. Manually defrost by unplugging for 24–48 hours to confirm.
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Test the refrigerator compartment thermistor with a multimeter. Replace it if the resistance is outside the expected range.
After any repair, reset the refrigerator by unplugging for 5 minutes. Monitor the temperature for 24 hours to confirm the fix.
When to Call a Professional
Evaporator fan motor replacement is $50 to $150. Thermistor replacement is $20 to $60. Defrost heater or thermostat replacement is $50 to $100. If the sealed cooling system has failed, a professional is required — sealed system repairs are not DIY-friendly.
Frequently Asked Questions
Is food safe to eat after the S error appears?
Check the refrigerator compartment temperature with a thermometer. Below 40°F (4°C) is safe. Above 40°F for more than 2 hours puts perishable food at risk. When in doubt, discard dairy, raw meat, cooked food, and leftovers.
Why is my freezer cold but the refrigerator shows an S error?
The most common reason is a failed evaporator fan. The freezer section gets cold from the evaporator coil directly. But the refrigerator section depends on that fan blowing cold air forward. If the fan fails, the freezer stays cold while the refrigerator warms up.
Can too much food in the refrigerator cause the S error?
Yes. An overpacked refrigerator blocks air circulation from the rear vents. This prevents cold air from reaching all areas of the compartment. The temperature rises, and the control board may display S. Rearranging or removing items often resolves this quickly.