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er ds
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Kenmore · Refrigerators
Defrost Sensor Failure
Quick Answer
Error code Er dS on your Kenmore Refrigerators means: Defrost Sensor Failure. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
517835182360412713227248273025
Likely Causes
  1. Defrost temperature sensor (thermistor) has failed or drifted out of calibration
  2. Sensor wiring has an open circuit or short circuit
  3. Sensor connector pins are corroded from moisture exposure in the freezer
  4. Sensor is physically damaged or displaced from its mounting location on the evaporator
How to Fix It
1
Remove the freezer evaporator cover panel to access the defrost sensor mounted on the evaporator
2
Check that the sensor is securely attached to the evaporator tubing and has not fallen off
3
Disconnect the sensor and measure its resistance with a multimeter (approximately 5k-10k ohms at freezer temperature)
4
Inspect the sensor wire and connector for damage, corrosion, or moisture
5
Replace the defrost sensor if the resistance is out of specification or reads open/short
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Kenmore defrost sensor/thermistor (model-specific)
Wire connector repair kit
Thermal adhesive for sensor mounting
Related Error Codes
Er IFEr FFEr CFEr COEr dH
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