Dacor Range, Oven, Cooktop Error Code U30

U30 indicates that the oven control has detected an open circuit in RTD 1, the temperature sensor for the upper or single oven cavity. The control cannot read the oven temperature and has disabled operation as a safety measure. The fault points to a problem in the sensor itself or in the wiring and connectors that connect it to the control board. Inspecting all connection points in the RTD 1 circuit is the correct first step.

No, the oven should not be used while U30 is active. Without a functioning temperature sensor, the control board cannot regulate oven temperature accurately, which creates a risk of overheating. Discontinue use until the fault is diagnosed and repaired.

Repair costs vary depending on the root cause. If only a connector needs to be reseated or a short wire section replaced, costs can be minimal. A replacement RTD temperature sensor typically runs in the range of $30 to $100 or more for parts alone, depending on the model. If the control board requires replacement, parts and labor costs can range from $200 to $500 or higher. Getting a diagnostic visit from a qualified technician will provide a more accurate estimate for your specific situation.

Some causes of U30, such as a loose connector, can be resolved without replacing parts if you are comfortable working around oven wiring with the appliance unplugged. Tracing the RTD wiring, reseating connectors, and visually inspecting for damaged wires are tasks a knowledgeable DIYer can attempt. If the sensor itself has failed internally, replacing the RTD requires sourcing the correct part for your specific Dacor model. More complex repairs involving the control board should be handled by a qualified technician.

A power reset by unplugging the oven or tripping the circuit breaker may temporarily clear the U30 code, but it will return immediately or during the next use if the underlying wiring or sensor problem has not been corrected. The fault must be diagnosed and repaired at the source to permanently resolve the error.