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Error code reference

Bosch Range Error Code F141

Slave micro not functioning; checked always with 1 minute fault limit.

Bosch codesBosch range codes

Slave micro not functioning; checked always with 1 minute fault limit.

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What F141 means on a Bosch range

F141 on a Bosch range indicates the main control board has lost communication with or cannot detect a functioning slave microcontroller. Bosch ranges with advanced electronic controls use a dual-processor architecture: a primary (master) microcontroller handles high-level functions while a secondary (slave) microcontroller manages specific subsystems such as burner output, oven temperature regulation, or safety monitoring. When the master processor cannot confirm the slave micro is operating correctly, it sets F141 and typically halts normal operation to prevent unsafe conditions.

For homeowners, think of this as two computers inside your range that constantly check in with each other. The main computer is reporting that its partner has gone silent or is sending back bad data. This can result from a failed secondary processor chip on the control board itself, a corrupted communication line between processors, or a power supply issue that is starving the slave micro of the voltage it needs to run. Physical damage from a power surge is also a known trigger. Because the slave micro often oversees critical safety functions, the range shuts down rather than operate with an unknown state in that subsystem.

Source: manufacturer service documentation.

Common causes of F141

  1. 01

    Failed slave microcontroller on the main control board

    Part replacement

    The slave micro chip itself can fail due to age, heat stress, or a voltage spike. When this chip stops functioning, the master processor cannot establish communication and F141 is triggered immediately on startup.

  2. 02

    Power surge damage to the control board

    Part replacement

    A voltage spike from a lightning strike or grid event can damage the slave micro or the communication circuitry between processors on the board, causing this fault to appear suddenly after a power event.

  3. 03

    Insufficient or unstable voltage supply to the control board

    Wiring / connection

    If the internal power supply feeding the control board drops out of spec, the slave microcontroller may fail to initialize properly, causing intermittent or persistent F141 errors even if the board hardware is otherwise intact.

  4. 04

    Corrupted control board firmware

    Wiring / connection

    In rare cases, a firmware corruption event can prevent the slave micro from booting correctly, causing the master processor to report F141. A Bosch-authorized technician can attempt a firmware reload before condemning the board.

See the test procedure for each cause

Frequently asked questions about F141

What does error code F141 mean on a Bosch range?
F141 means the main control board's master microcontroller has detected that the slave microcontroller is not functioning. Bosch ranges use two processors that work together, and this code fires when the primary processor cannot confirm the secondary one is running correctly. The range will typically shut down or refuse to operate until the fault is resolved.
Is it safe to use my Bosch range with an F141 error showing?
No, operating the range with F141 active is not advisable. The slave microcontroller often handles safety-critical functions including temperature monitoring and burner control. With this processor in an unknown state, the range cannot guarantee safe operation, which is exactly why Bosch designed it to shut down when this fault is detected. Do not attempt to bypass the error and use the appliance.
How do I fix F141 on a Bosch range?
Start by cutting power to the range at the breaker for 5 minutes and restoring it to see if the fault clears, which rules out a temporary initialization failure. If F141 returns immediately, the most likely fix is replacing the main control board, since the slave micro is integrated onto that board and cannot be replaced separately. Verify your incoming line voltage is correct before condemning the board, as low or unstable power can cause this fault without board failure.
How much does it cost to repair a Bosch range F141 error?
If a control board replacement is required, the board itself typically costs between $150 and $400 depending on the specific Bosch model, with labor adding $100 to $200 for a qualified technician. Total repair cost commonly runs $250 to $600. If the fault is caused by a power supply or wiring issue rather than a failed board, costs can be lower. Get the board part number from your model's wiring diagram before purchasing to ensure compatibility.
Can a power surge cause F141 on a Bosch range?
Yes, a power surge is a well-documented trigger for F141. Voltage spikes can damage the slave microcontroller chip or the communication circuitry on the control board, causing the fault to appear immediately after a storm or power grid event. If F141 appeared right after a surge, inspect the control board for visible burn marks or damaged components. In most surge-related cases, the control board will need to be replaced.

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