Dacor Range, Oven, Cooktop Error Code F4

F4 indicates that the Electronic Range Control has detected an open circuit in the oven temperature sensor for 16 consecutive temperature readings. This means the control cannot get a valid temperature signal from inside the oven cavity. As a result, all bake modes are disabled until the fault is resolved. The cause is typically a failed sensor, a loose connector, or damaged wiring.

The F4 error specifically disables bake modes, so the oven will not allow you to run a bake cycle while the fault is active. This is a protective lockout that prevents uncontrolled heating without temperature feedback. Broil or other functions may still be available depending on your specific model, but the appliance should be diagnosed and repaired before relying on it for cooking.

Resetting the oven by cutting power at the breaker may temporarily clear the F4 display, but the code will return if the underlying open circuit condition is still present. Because the ERC requires 16 consecutive open readings before triggering the fault, a reset may allow brief operation before the error reappears. Clearing the code permanently requires diagnosing and correcting the actual fault in the sensor or wiring circuit.

A knowledgeable DIYer can diagnose and often fix this error by testing the oven sensor and wiring harness with a multimeter for continuity. If the sensor reads open, replacing it is a straightforward repair involving removing the probe from inside the oven cavity and disconnecting the wiring connector. If the sensor tests good, tracing the wiring for damage or loose connectors is the next step. ERC board replacement is more complex and may warrant a professional technician.

If the oven temperature sensor has failed, parts typically range from $20 to $80 depending on the model, and the repair is often manageable without a service call. If a technician is needed, expect labor costs in the range of $80 to $200 on top of parts. A faulty ERC board is the most expensive scenario, with board costs ranging from $150 to $400 or more. Getting a professional diagnosis first can help avoid unnecessary parts replacement.