Dacor Range, Oven, Cooktop Error Code U35

U35 indicates a shorted RTD 3 condition on the temperature sensor for the upper or single oven cavity. The control board has detected an abnormally low resistance in the sensor circuit, which prevents it from reading oven temperature accurately. The fault code directs the technician to inspect wiring at all connection points between the sensor and the control board.

Using the oven while U35 is active is not recommended. A shorted temperature sensor means the control board cannot reliably monitor oven temperature, which could result in overheating or unpredictable operation. The oven should be taken out of service until the fault is diagnosed and repaired.

Repair costs vary depending on the root cause. If only a connector or wiring section needs repair, costs are generally lower, often in the range of $100 to $250 including labor. Replacing the RTD temperature sensor typically adds parts cost and may bring the total to $150 to $400. If the control board is at fault, that repair is more expensive and can range from $300 to $600 or more depending on the specific model.

A homeowner comfortable with basic electrical checks can start by inspecting the wiring harness and connectors for obvious damage, loose connections, or corrosion. However, testing RTD sensor resistance and safely accessing internal oven components requires some technical knowledge and a multimeter. If wiring looks intact and the fault persists, a qualified appliance technician should diagnose whether the sensor or control board needs replacement.

Resetting the oven by cutting power at the breaker for a few minutes may temporarily clear the U35 code, but it will return if the underlying short circuit in the RTD sensor or wiring has not been corrected. A reset is useful for confirming whether the fault is intermittent, but it is not a repair. The wiring and sensor must be inspected and tested to resolve the issue permanently.