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Error code reference

Thermador Range Error Code 22

Fault code indicated by first LED blinking 2 times followed by second LED blinking 2 times (specific meaning…

Thermador codesThermador range codes

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

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What 22 means on a Thermador range

Error code 22 on a Thermador range is communicated through a specific LED blink sequence: the first LED blinks twice, pauses, and then the second LED blinks twice. This dual-LED pattern is part of Thermador's blink-code diagnostic system, which uses combinations of LED flashes to identify fault conditions within the appliance. While the specific subsystem linked to code 22 is referenced only in the unit's internal fault chart, the two-two blink pattern represents a distinct fault state that the control board has detected and logged.

Blink-code systems like this are typically used on ranges to communicate faults from the main control board or secondary control modules when a standard digital display is not available or is itself malfunctioning. The pattern suggests a structured fault tier, where the first LED grouping identifies a fault category and the second grouping narrows it to a specific fault within that category. Components commonly associated with mid-range blink codes in this style of system include temperature sensing circuits, ignition control modules, and communication lines between the main board and subsidiary boards.

Because the precise technical definition of code 22 is not fully detailed beyond its chart reference, technicians should treat this code as a prompt to perform a systematic inspection of the control board, all associated wiring harnesses, and any sensors connected to the secondary control loop. Checking for loose connectors, visible burn marks on the board, and verifiable sensor resistance values within specification should be the foundation of the diagnostic process.

Source: manufacturer service documentation.

Common causes of 22

  1. 01

    Control Board Fault

    Part replacement

    The main or secondary control board may have detected an internal error or experienced a component failure. Inspect the board for burn marks, damaged capacitors, or corroded connectors.

  2. 02

    Wiring Harness Connection Issue

    Wiring / connection

    A loose, damaged, or corroded connector between control modules can trigger blink-code faults. Visually inspect all harness connections for secure seating and signs of heat damage or oxidation.

  3. 03

    Temperature Sensor Failure

    Part replacement

    A faulty oven temperature sensor or its associated wiring can cause the control board to log a fault code. Check the sensor's resistance value against specification and inspect the sensor lead connections.

  4. 04

    Ignition Control Module Issue

    Part replacement

    On gas models, a fault in the ignition control module or its communication path to the main board can produce blink-code errors. Test the module and its wiring for continuity and proper function.

  5. 05

    Intermittent Power Supply Disruption

    Wiring / connection

    Voltage fluctuations or a momentary power interruption can cause the control board to register and store a fault code. Check the power supply connections and verify stable voltage at the range terminal block.

See the test procedure for each cause

Frequently asked questions about 22

What does 22 mean on a Thermador range?
Error code 22 on a Thermador range is indicated by the first LED blinking twice followed by the second LED blinking twice. It represents a fault condition detected by the range's control system, referenced in the unit's internal fault chart. The specific subsystem involved is not fully detailed in available documentation, so a systematic diagnostic inspection is recommended. A technician should check the control board, wiring harnesses, and any connected sensors.
Can I fix error code 22 on my Thermador range myself?
Some causes of this code, such as a loose wiring harness connector, can be addressed by a knowledgeable DIYer comfortable working with appliance electronics after disconnecting power. However, if the fault involves a failed control board, a temperature sensor, or an ignition module, replacement parts and proper testing equipment are needed. If you are not confident working inside the appliance, it is best to contact a qualified appliance technician.
Is it safe to use my Thermador range while error code 22 is displayed?
It is generally not recommended to continue using a range that is actively displaying a fault code, as the underlying issue may affect the safety or proper operation of the appliance. Depending on the component involved, continued use could pose a risk of improper heating, ignition issues, or further damage to control components. Discontinue use and have the fault diagnosed before operating the range again.
How much does it cost to repair a Thermador range showing error code 22?
Repair costs vary depending on the root cause identified during diagnosis. A wiring or connector fix may cost relatively little beyond a service call fee, typically in the range of $75 to $150 for the visit. If a control board or ignition module needs replacement, total costs including parts and labor can range from $200 to $600 or more depending on the specific component and your location.
Will resetting my Thermador range clear error code 22?
Power cycling the range by disconnecting it from power for several minutes may temporarily clear the blink-code display if the fault was caused by a transient issue such as a power fluctuation. However, if an underlying component failure is present, the code will return once the appliance is powered back on and the fault condition is detected again. A reset should be considered a diagnostic step, not a repair solution.

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