Samsung Range Error Code to

The "to" error code on a Samsung range indicates a top sensor open error. This means the control system has detected an open circuit in the top temperature sensor, which prevents the range from receiving accurate temperature data. The sensor circuit runs through the CN03 connector on the touch pad assembly, and the control board continuously monitors resistance values from this sensor to regulate cooking temperatures. When the resistance reading falls outside the expected range for the current temperature, the board interprets this as an open or failed circuit and triggers the error.

The most common causes include a physically disconnected wiring harness, a damaged or broken sensor element, and a faulty Touch PCB assembly. Wire connections can loosen over time due to vibration or heat cycling, causing intermittent or permanent open circuit conditions. The sensor itself can fail internally, producing an out-of-range resistance reading even when the wiring appears intact.

One important environmental factor is ambient temperature. If the installation area drops below 14 degrees Fahrenheit, the sensor resistance can shift enough to trigger the open error even when all components are functioning correctly. Diagnosis should always begin by measuring the top sensor resistance at the CN03 touch pad connector and comparing that reading against the resistance chart for the specific temperature. If the resistance matches the chart values and all wiring connections are secure, the Touch PCB assembly is the likely culprit and should be replaced.