Samsung Range Error Code Top Sensor Open

The Top Sensor Open error means the MICOM on your Samsung range has detected an open circuit condition in the cooktop temperature sensor. Specifically, the A/D value the control board reads has risen above 252, indicating the sensor is either disconnected, broken, or has failed. The error can also appear if the ambient temperature has dropped below -10 degrees Celsius. The range flags this fault to prevent operation without valid temperature feedback from the cooktop.

It is not recommended to continue using the cooktop with this error active. The sensor is responsible for providing temperature data to the control board, and operating without valid sensor feedback can prevent the range from regulating heat correctly. Discontinue use of the affected cooktop zones until the fault is diagnosed and repaired.

Repair costs vary depending on the failed component. A replacement cooktop temperature sensor typically costs between $15 and $60 for the part alone. If the control board (PCB) is found to be defective, the part cost alone can range from $100 to $300 or more. Adding professional labor generally brings total repair costs to between $100 and $400 depending on the diagnosis and your location.

Some cases can be resolved without professional help. Start by checking that the sensor connector is firmly seated at both the sensor and control board ends, and verify that each sensor wire is routed to the correct burner position. If reconnecting the sensor does not clear the fault, use a multimeter to test sensor resistance for an open circuit. If the sensor is confirmed defective, replacing it is a repair many experienced DIYers can complete, though working near electrical components always carries some risk.

Resetting the range by cycling power may temporarily clear the error code, but the fault will return if the underlying problem is not corrected. If the sensor is open or disconnected, the MICOM will detect the abnormal A/D value again as soon as the unit powers back up. A reset is useful for confirming whether the fault is intermittent, but it is not a substitute for diagnosing and repairing the sensor or wiring.