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Error code reference

Dacor Oven Error Code C23

Control board ambient temperature is above 80°C; oven shuts down and cooling fans turn ON until ambient…

Dacor codesDacor oven codes

Control board ambient temperature is above 80°C; oven shuts down and cooling fans turn ON until ambient temperature falls to 50°C.

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What C23 means on a Dacor oven

The C23 error code on a Dacor oven indicates that the ambient temperature surrounding the main control board has exceeded 80 degrees Celsius. This is a thermal protection response built into the control system. When the board-level temperature sensor detects this threshold has been crossed, the oven immediately shuts down all heating functions and activates the cooling fans. The fans continue running until the ambient temperature at the control board drops back to 50 degrees Celsius, at which point normal operation may resume.

The control board in a Dacor oven is typically located behind the control panel or in a rear cavity, and it relies on adequate airflow and heat dissipation to stay within safe operating temperatures. If heat generated by the oven cavity migrates into this area, or if the cooling fans are not moving sufficient air across the board, temperatures can climb into the danger zone. This thermal shutdown is a protective measure designed to prevent damage to sensitive electronics on the control board itself.

Common contributors to this condition include failed or obstructed cooling fans, blocked ventilation pathways around the unit, or a control board that has developed a faulty onboard temperature sensor reporting inaccurate readings. Installation environment also plays a role: an oven installed in a tight cabinet cutout without proper clearances can trap heat and push ambient temperatures above safe limits during extended cooking cycles.

Source: manufacturer service documentation.

Common causes of C23

  1. 01

    Cooling fan failure or reduced airflow

    Part replacement

    If one or more of the oven's cooling fans has failed or is running below normal speed, heat can build up around the control board rapidly. Listen for the fans during and after operation and check for any that are not spinning or are noticeably slower than others.

  2. 02

    Blocked ventilation pathways

    Wiring / connection

    Debris, grease buildup, or improper installation with insufficient clearances around the oven can restrict the airflow needed to keep control board temperatures in range. Inspect all vent openings on the unit for obstructions and verify the oven has the clearances specified for the installation.

  3. 03

    Extended high-temperature cooking cycles

    Wiring / connection

    Running the oven at maximum temperature for prolonged periods, especially in a warm kitchen or poorly ventilated space, can push ambient heat levels high enough to trigger C23 even with functional cooling components. This is more likely during self-clean cycles, which operate at very high temperatures.

  4. 04

    Faulty control board temperature sensor

    Part replacement

    The sensor on the control board that monitors ambient temperature may have drifted out of calibration or failed, causing it to report temperatures above 80 degrees Celsius even when actual conditions are normal. If the error occurs during short or low-temperature cooking cycles, a faulty sensor or control board is more likely.

  5. 05

    Control board failure

    Part replacement

    In some cases the control board itself has sustained heat damage from repeated thermal events or a component failure, leading to incorrect thermal readings or an inability to properly manage the cooling response. A board that continues triggering C23 after all other causes are ruled out likely needs replacement.

See the test procedure for each cause

Frequently asked questions about C23

What does C23 mean on a Dacor oven?
C23 means the ambient temperature around the oven's control board has risen above 80 degrees Celsius, triggering an automatic thermal shutdown. The oven cuts off heating and turns on its cooling fans to bring the temperature back down to 50 degrees Celsius before allowing normal operation to resume. This is a protective feature designed to prevent damage to the control electronics.
Can I fix a Dacor C23 error myself?
Some causes of C23 are DIY-friendly, such as clearing blocked vents, cleaning grease from ventilation openings, and verifying the oven has proper installation clearances. If a cooling fan has failed or the control board needs replacement, those repairs require sourcing the correct parts and a higher level of comfort working with appliance electronics. If you are unsure, a qualified appliance technician can diagnose the root cause efficiently.
Is it safe to use my Dacor oven when the C23 code is showing?
No, the oven shuts itself down when C23 is active specifically because operating with overheated control electronics risks permanent board damage. Do not attempt to force the oven back on while the error is present. Allow the cooling fans to run and the unit to cool fully before attempting to restart, and address the underlying cause before using the oven again.
Will resetting the oven clear the C23 error code?
A reset may clear the error display temporarily, but the code will return if the underlying cause of the overheating has not been corrected. The oven's thermal protection system will trigger C23 again whenever the control board ambient temperature exceeds 80 degrees Celsius. Clearing the code without fixing the root cause can lead to repeated shutdowns or eventual board damage.
How much does it cost to repair a Dacor oven showing C23?
Repair costs vary widely depending on the cause. Clearing a ventilation blockage costs nothing beyond your time, while a cooling fan replacement might run anywhere from $100 to $300 including parts and labor. Control board replacement on a Dacor oven is typically the most expensive repair, often ranging from $300 to $700 or more depending on the specific model and labor rates in your area.

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