Dacor Range Error Code Oven On Indicator Light blinks once every 5 seconds

On a Dacor range, the Oven On Indicator Light blinking once every 5 seconds signals that the control board has detected a short condition in the oven temperature sensor circuit. The oven temperature sensor, also called a resistance temperature detector (RTD), is a probe mounted inside the oven cavity that changes its electrical resistance in proportion to temperature. The control board continuously monitors this resistance to regulate oven temperature accurately. When the sensor or its wiring circuit presents a resistance reading that falls below the expected range, the controller interprets this as a short and triggers the blinking indicator as a fault alert.

The correct resistance for the Dacor oven temperature sensor at room temperature should measure between 1050 and 1100 ohms when tested at the controller board connector P2. A shorted sensor or wiring harness will typically read significantly below this range, sometimes approaching 0 ohms depending on the severity of the fault. This out-of-range reading prevents the controller from accurately determining oven temperature, which is why the oven will not operate normally during this fault condition.

The most reliable first diagnostic step is to disconnect the sensor wiring at controller board connector P2 and measure resistance across the sensor leads with a multimeter. If the reading falls outside the 1050 to 1100 ohm window at room temperature, the sensor itself or the wiring between the sensor and the board is the source of the fault. Inspecting the wiring harness for pinched, burnt, or melted insulation is important before condemning the sensor probe itself, as harness damage is a common contributor to short conditions in oven sensor circuits.