Dcs Refrigerator Error Code F-DEFROST SENSOR

The F-DEFROST SENSOR error indicates a fault with the freezer room defrost sensor, which monitors evaporator coil temperature during defrost cycles. The control board displays this code when the sensor reports a temperature above 149°F or below -58°F. Causes include the sensor slipping off the evaporator, wiring damage, a short circuit, or a failed sensor. The fault affects the defrost system and should be diagnosed promptly.

A power reset may temporarily clear the fault code, but if the underlying problem (a displaced sensor, damaged wire, or defective sensor) is not corrected, the error will return. Resetting without repairing the root cause is not a fix and may allow the defrost system to operate incorrectly in the meantime.

If the sensor has simply slipped out of position, the repair may cost nothing beyond a service call fee, typically in the range of $75 to $150. Replacing a defective defrost sensor generally costs between $100 and $250 including parts and labor, depending on your location and the technician's rates. Wiring repairs can vary more widely depending on the extent of the damage.

Start by inspecting the defrost sensor on the F-Room evaporator to confirm it is properly seated and making full contact with the coil. Next, check the wiring harness for cuts, pinched sections, shorts, and loose or corroded connectors. If the wiring and mounting are both in good condition, test the sensor resistance to determine if the sensor itself has failed and needs replacement.

A malfunctioning defrost sensor can prevent the refrigerator from completing its defrost cycle properly. Over time, this can lead to ice buildup on the evaporator coil, reduced cooling performance, and potential food spoilage. While not an immediate safety hazard, it should be addressed in a timely manner to protect stored food and prevent further damage to components.