Dacor Range, Oven, Cooktop Error Code U33

The U33 code indicates a shorted RTD 2 temperature sensor on the upper or single oven. The sensor, which measures oven cavity temperature using electrical resistance, is producing an abnormally low or collapsed resistance reading that signals a short circuit. The oven disables itself when this fault is detected to prevent uncontrolled temperature conditions. The fault can be in the sensor itself, the wiring harness, or the connector points along the circuit.

No, you should not attempt to operate the oven while the U33 error is active. A shorted temperature sensor means the control board cannot reliably monitor oven temperature, which creates a risk of overheating. The oven's safety shutdown is in place for this reason, and bypassing it is not advisable. Resolve the fault before resuming use.

If only the RTD temperature sensor needs replacement, parts typically range from around $30 to $100 depending on the model, with labor adding $75 to $200 if a technician performs the work. If the wiring harness requires replacement or repair, costs can increase moderately. A control board replacement, if needed, is the most expensive scenario and can range from $200 to $500 or more for parts alone.

A knowledgeable DIYer can begin by inspecting the wiring and connector points for visible damage, corrosion, or loose connections, which requires no special tools. If the wiring looks intact, testing the RTD sensor with a multimeter to check its resistance is the next step. Replacing the temperature sensor is a straightforward repair for someone comfortable working with appliances. However, if the control board is involved, professional diagnosis is recommended.

A power reset by turning off the circuit breaker for one to two minutes may temporarily clear the code, but it will return if the underlying fault is still present. The short circuit in the RTD sensor circuit must be physically repaired or the faulty component replaced for the error to clear permanently. Repeated resets without repair will not resolve the problem.