Dacor Range Error Code F30

The F30 error code on a Dacor range indicates a shorted temperature sensor or shorted temperature sensor wiring circuit. The oven temperature sensor, typically a resistance temperature detector (RTD), works by changing its electrical resistance in proportion to oven cavity temperature. Under normal operating conditions, the sensor presents a specific resistance value to the control board, allowing it to calculate and regulate oven temperature accurately. A short condition means the sensor circuit is presenting abnormally low resistance, or the wiring has developed a fault that collapses the signal, causing the control board to read an erroneous temperature and trigger this fault code.

The most common source of this fault is physical damage to the sensor probe itself or to the wiring harness that connects it to the control board. The sensor is mounted inside the oven cavity and is exposed to high heat cycles repeatedly over time. The insulation on the sensor wiring can degrade, allowing two conductors to contact each other or contact the oven chassis, creating a short to ground. In some cases, a grease or moisture intrusion event can bridge conductors at a connector point.

Diagnosing F30 requires disconnecting the sensor and measuring its resistance with a multimeter at room temperature. A healthy RTD sensor typically reads near 1080 ohms at room temperature, though the precise spec should be confirmed for the specific model. A reading near zero ohms confirms an internal sensor short. If the sensor measures correctly in isolation, the wiring harness must be inspected for pinched, burned, or damaged sections that are creating the short condition.