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Error code reference

Wolf Oven Error Code E26/F3

Open circuit in temperature sensor 300C.

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What the E26/F3 error code actually means

Your Wolf oven has detected that the high-temperature sensor inside the oven has stopped sending a signal to the control board, which prevents the oven from accurately monitoring its temperature. This could mean the sensor itself has burned out, or a wire connecting it to the control board has broken or come loose. The oven will not operate safely until this is diagnosed and repaired.

Diagnostic procedure

The full E26/F3 procedure

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1
First diagnostic step
Measure resistance of the temperature sensor 300C.
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Most common causes of E26/F3

Ranked by how often they cause this code
  1. 1Failed temperature sensor
  2. 2Broken or damaged wiring harness
  3. 3Loose or corroded connector pins
  4. 4Control board input circuit failure

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Questions people ask about E26/F3

What does E26/F3 mean on a Wolf oven?
E26/F3 indicates an open circuit in the 300C temperature sensor, meaning the oven control board is not receiving any signal from that sensor. This prevents the oven from accurately tracking internal temperature. The fault can originate at the sensor itself, the connecting wiring, or the control board.
Is it safe to use my Wolf oven while E26/F3 is displayed?
You should not operate the oven while this error is active. The 300C sensor is part of the temperature monitoring system, and without a valid signal from it, the oven cannot properly regulate or limit heat. Continued use risks overheating or unpredictable temperature behavior.
How much does it cost to repair a Wolf oven E26/F3 error?
Repair costs vary depending on the failed component. A replacement temperature sensor typically runs in the range of $30 to $100 for the part alone. If the control board requires replacement, parts alone can range from $200 to $500 or more. Adding professional labor costs will increase the total, and a service call to a Wolf-authorized technician is advisable for an accurate estimate.
Can I fix E26/F3 on my Wolf oven myself?
A knowledgeable DIYer can begin by measuring the resistance of the 300C temperature sensor with a multimeter to determine if the sensor has failed internally. Connector inspection and reseating are also accessible steps. However, if the wiring harness or control board requires replacement, professional service is recommended to ensure proper handling of oven electrical components.
Will resetting the oven clear the E26/F3 error code?
A reset by cutting power to the oven may temporarily clear the code, but if the underlying sensor or wiring fault still exists, the error will return once the oven restarts and attempts to read the sensor. The root cause must be diagnosed and repaired for the code to clear permanently.

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