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Error code reference

Thermador Range Error Code 23

Fault code indicated by first LED blinking 2 times followed by second LED blinking 3 times (specific meaning not detailed in manual beyond chart…

Thermador codesThermador range codes
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What the 23 error code actually means

Your Thermador range has detected an internal problem and is communicating it by blinking its indicator lights in a specific pattern, two blinks followed by three blinks. This usually points to an issue with the electronic controls or the connections inside the range. A technician with the right tools can trace the fault and determine whether a component needs to be repaired or replaced.

Diagnostic procedure

The full 23 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

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1
Confirm the fault
Power cycle the unit: switch off the breaker for 60 seconds, then restore power. If the code returns, the fault is persistent and the procedure below isolates the cause.
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Most common causes of 23

Ranked by how often they cause this code
  1. 1Loose or corroded wiring harness connections
  2. 2Main control board failure
  3. 3Intermittent power supply issue
  4. 4Damaged wiring in the harness
  5. 5Failed sensor or igniter circuit component

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Questions people ask about 23

What does 23 mean on a Thermador range?
Error code 23 on a Thermador range is displayed as a blink sequence: the first indicator LED blinks twice, then the second LED blinks three times. This pattern signals a fault condition stored by the main control board. The specific subsystem is not itemized beyond the blink chart, so further hands-on diagnosis is needed to identify the root cause.
Is it safe to use my Thermador range while error code 23 is showing?
It is generally not advisable to continue using the range while a fault code is active. An undiagnosed control fault could affect the operation of burners or oven functions in unpredictable ways. It is best to stop using the appliance and have it inspected before resuming normal cooking.
How much does it cost to repair error code 23 on a Thermador range?
Repair costs vary depending on the root cause. If the fix involves reseating loose connectors, the cost may only be a service call fee, typically in the range of $75 to $150. If a control board replacement is required, parts and labor combined can range from $300 to $600 or more depending on the specific model and local labor rates.
Can I fix error code 23 on my Thermador range myself?
Some causes, like loose wiring harness connectors, can be checked by a confident DIYer comfortable working with appliance electronics after disconnecting power. However, if the fault points to the control board or internal wiring damage, replacement and testing typically require a qualified technician. Always disconnect the range from power before opening any panels.
Will resetting my Thermador range clear error code 23?
Disconnecting the range from power for several minutes may temporarily clear the code. However, if an underlying fault exists in the control board, wiring, or a connected component, the code will likely return once the range resumes normal operation. A reset is useful for confirming whether the fault is persistent, but it is not a repair.

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