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Error code reference

Thermador Cooktop Error Code E8206

Error checking cooking sensor components: thermopile

Thermador codesThermador cooktop codes

Error checking cooking sensor components: thermopile — displayed after using the cooking sensor when hob has been turned off.

First step from the service manual

Replace the cooking sensor.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What E8206 means on a Thermador cooktop

E8206 is a thermopile fault code on Thermador cooktops equipped with a cooking sensor system. The cooking sensor uses a thermopile, which is a thermoelectric device that generates a small voltage proportional to the surface or food temperature it measures. When the cooktop is turned off after a cooking sensor session, the control board runs a self-check on the sensor circuit. If the board detects an anomaly in the thermopile signal during this post-use check, it logs and displays E8206.

The thermopile can fail in several ways that trigger this code. Internal degradation of the thermocouple junctions within the thermopile can cause the output voltage to fall outside the expected range. Physical damage, contamination from spills, or heat stress from prolonged high-temperature exposure can all compromise the thermopile's ability to generate a consistent signal. The board interprets any out-of-range or absent voltage as a component error.

Because the fault appears specifically after the cooking sensor has been actively used and the hob is then switched off, it points directly to the sensor assembly rather than the control board or wiring harness as the primary suspect. The recommended first diagnostic action is to replace the cooking sensor, since the thermopile is integrated into that assembly and is not a separately serviceable component. If replacing the cooking sensor does not resolve the code, further inspection of the sensor wiring connections and control board inputs would be the next steps.

Source: manufacturer service documentation.

Common causes of E8206

  1. 01

    Failed thermopile in the cooking sensor

    Part replacement

    The thermopile inside the cooking sensor assembly degrades over time or from heat stress, causing its output voltage to fall outside the range the control board expects. This is the most direct cause of E8206 and the first component to replace.

  2. 02

    Contamination or physical damage to the sensor

    Part replacement

    Food spills, grease buildup, or physical impact can damage the sensor tip or interfere with the thermopile's ability to generate a clean signal. Inspect the sensor surface for visible residue, corrosion, or deformation.

  3. 03

    Loose or corroded sensor wiring connection

    Wiring / connection

    A loose connector or corroded terminal between the cooking sensor and the control board can interrupt the thermopile signal. Check the connector at both the sensor end and the board end for secure seating and clean contacts.

  4. 04

    Damaged sensor cable

    Part replacement

    The cable running from the cooking sensor to the control board can develop breaks or shorts from repeated flexing or heat exposure near the burner area. Inspect the full length of the cable for visible damage or chafing.

  5. 05

    Control board input fault

    Part replacement

    If a replacement cooking sensor does not clear the error, the control board's sensor input circuit may have failed and is misreading the thermopile signal. This is the least common cause and should be investigated only after sensor replacement.

See the test procedure for each cause

Frequently asked questions about E8206

What does E8206 mean on a Thermador cooktop?
E8206 indicates that the cooktop's control board detected an error in the thermopile component of the cooking sensor assembly. This check runs automatically after the cooking sensor has been used and the hob is turned off. The thermopile is the thermoelectric element inside the sensor that measures temperature, and when it produces an out-of-range or absent signal, this code is triggered. Replacing the cooking sensor is the recommended first step.
Can I fix E8206 myself, or do I need a technician?
A knowledgeable DIYer comfortable with disassembling a cooktop can replace the cooking sensor, which is the primary fix for this error. However, if the error persists after sensor replacement, diagnosing wiring faults or a control board issue is more involved and may warrant a qualified technician. Always disconnect power to the cooktop before performing any repair work.
Is it safe to use my Thermador cooktop while E8206 is displayed?
E8206 specifically affects the cooking sensor function, which is used for temperature-guided cooking modes. If that feature is disabled or unavailable while the fault is present, standard manual burner operation may still function. However, continued use without addressing a sensor fault is not recommended, and you should confirm the cooktop operates normally in all other respects before using it.
Will resetting the cooktop clear the E8206 error?
A power reset may temporarily clear the code from the display, but E8206 will return the next time the cooking sensor is used and the hob is turned off if the underlying thermopile fault has not been resolved. Resetting does not repair the sensor. A proper fix requires replacing the cooking sensor or addressing the identified wiring or component fault.
How much does it cost to repair a Thermador cooktop showing E8206?
The cost depends on whether you replace the cooking sensor yourself or hire a technician. The cooking sensor part itself typically falls in the range of $50 to $150 depending on the specific cooktop model. If a service technician is needed, labor costs can add $100 to $250 or more to the total, and costs increase further if the control board is found to be at fault.

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