Thermador Oven F13 Error: Power Board Not Calibrated
thermador oven f13 error indicates power board not calibrated. Stop using the appliance and call a Thermador-certified technician immediately for diagnosis. What Does Thermador Oven Error Code F13 Mean? The F13 error code on Thermador double and combination wall ovens — including C302, CM302, and CJ301 model series — indicates the relay control board is […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. An uncalibrated relay board cannot accurately regulate temperature. Cooking results will be unpredictable and self-clean cycles may overheat the cavity. Do not use the oven until calibration is loaded.
Can I reset the code?
No. A breaker reset does not reload calibration data. The data must be written to the board EEPROM by a service tool or replacement board pre-loaded with the correct calibration.
When to stop immediately?
Stop if you notice: Oven temperature varies by more than 50°F from the setpoint, Self-clean cycle aborts early or the cavity overheats during cleaning.
Symptoms You May Notice
F13 appears immediately after a relay board replacement
The error shows up on the first power-up following a board replacement, because the new board shipped without model-specific calibration loaded.
Oven heats but temperatures are significantly off from the setpoint
Without calibration tables, the control uses generic values and the actual cavity temperature can differ from the set temperature by 50°F or more.
Self-clean cycle aborts early or overheats
Without calibration, the board cannot accurately determine when clean temperature has been reached, leading to early aborts or overshoot.
Possible Causes
Replacement relay board not programmed before installation
A new relay board was installed but the technician did not transfer or load the oven-specific calibration data required for accurate temperature regulation.
Requires ProfessionalCalibration data lost from board EEPROM
The calibration table stored in the relay board EEPROM was erased by a power surge or corrupted during a firmware event.
Requires ProfessionalWrong board programmed with another model calibration
A replacement board was programmed, but with calibration data from a different oven model, causing the control to operate with incorrect temperature mapping.
Requires ProfessionalSafe Checks You Can Do
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1
Verify the service history
Confirm whether a relay board was recently replaced. If yes, contact the technician who performed the service and ask whether the board was calibrated for your specific oven model and serial number.
Thermador C302, CM302, and CJ301 relay boards require model-specific calibration data. A board pulled from a demo unit or returned stock may not carry the correct calibration for your oven.
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2
Check actual versus set temperature
If the oven runs at all, preheat to 350°F and place an independent oven thermometer on the center rack. Compare readings after 30 minutes of cycling.
A calibration error of more than 50°F — or a reading that swings widely between cycles — confirms the board is operating without proper calibration tables.
Tools required
When to Call a Professional
Contact a qualified technician if:
- Service receipt confirms relay board was replaced without calibration programming
- Independent thermometer confirms significant temperature deviation from setpoint
- F13 returns after every reset on a newly installed board
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