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Error code reference

Thermador Range Error Code F141

Slave micro not functioning.

Thermador codesThermador range codes

Slave micro not functioning.

First step from the service manual

Check power and Display Board connectors P1B and associated wiring. If OK, replace Power Board. If fault persists, replace Display Board.

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

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What F141 means on a Thermador range

The F141 error code on a Thermador range indicates that the slave microcontroller is not functioning. In ranges that use a distributed control architecture, the main control system is divided between a primary (master) microcontroller and a secondary (slave) microcontroller. These two processors communicate continuously to coordinate range functions, display output, and user input processing. When the slave micro fails to respond or operate correctly, the system flags F141 to alert the technician that inter-processor communication has broken down.

The slave microcontroller typically resides on the Display Board, while the Power Board houses the primary control logic. Communication between these boards runs through connector P1B and its associated wiring harness. A loose, corroded, or damaged connection at P1B can interrupt the signal path and cause the slave micro to appear unresponsive even if the Display Board itself is functional. This makes the wiring and connector inspection the critical first diagnostic step before condemning any component.

If the connector and wiring at P1B are confirmed to be in good condition and properly seated, the fault points toward a hardware failure in one of the two boards. The Power Board is replaced first because it controls power delivery and communication signaling to the Display Board. If replacing the Power Board does not resolve the fault, the Display Board, which hosts the slave microcontroller, is then replaced. Component failure on either board can prevent the slave micro from initializing or maintaining normal operation.

Source: manufacturer service documentation.

Common causes of F141

  1. 01

    Loose or damaged connector P1B

    Wiring / connection

    The wiring connector P1B links the Power Board and Display Board. If this connector is unseated, corroded, or has damaged pins, communication with the slave microcontroller is interrupted and F141 is triggered.

  2. 02

    Damaged wiring harness between boards

    Part replacement

    Wires routed between the Power Board and Display Board can develop breaks, chafing, or heat damage over time. A compromised harness will disrupt the signal needed to confirm slave micro operation.

  3. 03

    Failed Power Board

    Part replacement

    The Power Board generates and manages the communication signals sent to the Display Board. A failure on the Power Board can prevent the slave microcontroller from receiving the signals it needs to function, even if the Display Board is intact.

  4. 04

    Failed Display Board

    Part replacement

    The slave microcontroller is located on the Display Board. If the Display Board has suffered a component failure, the slave micro will not initialize or respond, and F141 will persist even after the Power Board is replaced.

See the test procedure for each cause

Frequently asked questions about F141

What does F141 mean on a Thermador range?
F141 indicates that the slave microcontroller is not functioning. Thermador ranges use two control boards that communicate with each other, and F141 means the secondary processor on the Display Board is not responding. The fault is typically traced to a wiring or connector issue at connector P1B, a failed Power Board, or a failed Display Board.
Can I fix F141 on my Thermador range myself?
A knowledgeable DIYer can start by inspecting connector P1B and its wiring for obvious damage, corrosion, or loose seating, as this is the first recommended diagnostic step. However, if the wiring checks out, the repair requires replacing the Power Board or Display Board, which involves working with mains voltage components and should be handled carefully. If you are not comfortable working inside the appliance, a qualified appliance technician is the safer choice.
Is it safe to use my Thermador range when F141 is displayed?
It is generally not recommended to continue using the range while an F141 fault is active. A non-functioning slave microcontroller means part of the range's control system is compromised, which can affect normal operation and safety monitoring. Discontinue use and address the fault before operating the appliance again.
How much does it cost to repair a Thermador range with error code F141?
Repair costs vary depending on which component is at fault. If the issue is a loose connector or wiring repair, labor costs alone may apply, typically in the range of $100 to $200 for a service call. If the Power Board or Display Board needs replacement, parts costs can add $150 to $400 or more depending on the specific model, plus labor.
Will resetting my Thermador range clear the F141 error?
A power cycle or reset may temporarily clear the F141 code, but if the underlying cause is a hardware fault such as a failed board or damaged connector, the error will return. A reset is not a fix for F141 and should only be used as a step to confirm whether the fault is intermittent or persistent. Persistent return of F141 after a reset means the root cause must be diagnosed and repaired.

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