Dacor Range, Oven, Cooktop Error Code U22

The U22 code indicates an over-temperature condition in the upper or single oven cavity. Dacor's control system has detected that the oven temperature exceeded its safe limit and has identified one or more temperature sensors as being out of calibration or faulty. The code is the oven's way of alerting you that temperature monitoring is compromised and further investigation is needed before safe operation can continue.

It is not recommended to continue using the oven while the U22 code is present. The fault indicates that temperature regulation may be unreliable, meaning the oven could overheat beyond safe limits without the control board being able to respond correctly. Using the oven in this condition risks damaging internal components and could pose a fire hazard.

Repair costs vary depending on the diagnosis. A replacement oven temperature sensor typically costs between $20 and $80 for the part, while a new control board can range from $150 to $400 or more depending on the model. Adding a technician's labor, total repair costs generally fall between $100 and $500, with sensor replacements sitting at the lower end and control board replacements at the higher end.

Some basic steps, such as reseating loose sensor connectors, are within reach for a confident DIYer. However, accurately diagnosing a failed RTD sensor requires measuring resistance with a multimeter and comparing the reading to specification, which takes some technical familiarity. Replacing internal oven components near high-voltage wiring is best handled by a qualified appliance technician if you are not comfortable with electrical diagnostics.

Power-cycling the oven by shutting off the circuit breaker for a few minutes may temporarily clear the code, but if the underlying sensor or wiring problem is still present, the U22 error will return once the oven is used again. A reset is useful for confirming whether the fault is intermittent, but it does not repair the root cause.