Wolf Range Error Code 5121

Error code 5121 means the RTD temperature sensor in the right oven cavity is reading a temperature above 600°F (316°C) while the oven is not in self-clean mode. This triggers a protective fault that halts oven operation. The cause may be an actual overheating condition or a malfunctioning RTD sensor reporting an incorrect temperature to the control board.

Resetting the range by powering it off at the breaker for a few minutes may temporarily clear the error, but it will return if the underlying problem is not corrected. A stuck relay, faulty RTD sensor, or damaged wiring will continue to trigger the fault code. A reset is useful for diagnostic purposes but is not a repair.

Repair costs vary depending on which component has failed. An RTD sensor replacement is generally the least expensive fix, with parts and labor typically ranging from $150 to $350. If the control board requires replacement, costs can range from $400 to $800 or more depending on parts availability and labor rates in your area. Getting a diagnostic service call first is recommended to pinpoint the exact cause before committing to parts.

You should not attempt to operate the right oven while this error is active. If the oven is genuinely overheating, continuing to use it could damage internal components or create a fire risk. If the sensor is faulty, the control system cannot reliably regulate oven temperature, making safe cooking impossible until the root cause is resolved.

Start by checking the actual oven temperature with an independent thermometer to determine whether genuine overheating is occurring. Then test the RTD sensor's resistance to confirm it is reading accurately. Depending on findings, the repair may involve replacing the RTD sensor, inspecting and repairing the sensor wiring, or replacing the control board if a relay has failed.