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Error code reference

Bosch Range Error Code F94

Maximum oven door lock attempts exceeded during self-clean cycle or oven lockout operation.

Bosch codesBosch range codes

Maximum oven door lock attempts exceeded during self-clean cycle or oven lockout operation.

First step from the service manual

If lock motor runs: test continuity of wiring between control module and lock switch on lock motor assembly. If lock motor does not run: test continuity of lock motor windings.

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

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What F94 means on a Bosch range

The F94 error code on a Bosch range indicates that the oven door lock mechanism has exceeded its maximum number of lock attempts during either a self-clean cycle or a manual oven lockout operation. The door lock system relies on a lock motor assembly that physically drives a latch into position to secure the oven door at high temperatures. The control module monitors the position of the latch through a lock switch integrated into the motor assembly, and it expects confirmation that the door has successfully locked within a defined number of motor cycles. When that confirmation is never received, the control module logs F94 and halts the operation.

The two primary failure paths correspond directly to the first diagnostic step. If the lock motor is running but F94 still triggers, the motor is receiving power and turning, but the control module is not seeing a signal change from the lock switch. This points to a wiring fault between the control module and the lock switch, specifically an open circuit or damaged connector in that signal path. If the lock motor does not run at all, the motor windings themselves should be tested for continuity, as an open winding means the motor cannot physically move the latch regardless of commands from the control board.

Additional causes include a mechanically obstructed or seized latch that prevents the motor from completing its travel even when electrically functional, and a failed control module that is not correctly sending the drive signal to the motor. Carbon buildup or debris around the door latch opening after repeated self-clean cycles can also prevent full latch engagement, causing repeated failed attempts until the error threshold is reached.

Source: manufacturer service documentation.

Common causes of F94

  1. 01

    Faulty lock switch or open wiring to lock switch

    Part replacement

    When the lock motor runs but F94 still appears, the lock position switch is not sending a confirmation signal back to the control module. Test the wiring harness between the control board and the lock switch for continuity, and inspect connectors for corrosion or damage.

  2. 02

    Failed lock motor windings

    Part replacement

    If the lock motor does not run at all when a lock command is issued, the motor windings may be open. Test the motor windings for continuity with a multimeter; a lack of continuity confirms the motor needs replacement.

  3. 03

    Mechanically obstructed door latch

    Wiring / connection

    Carbon deposits, grease buildup, or debris around the door latch opening can physically prevent the latch from fully engaging, causing the motor to stall or fail to complete its travel. Inspect the latch opening and surrounding area for obstruction and clean as needed.

  4. 04

    Damaged or seized lock motor assembly

    Part replacement

    Even with intact windings, the motor gearbox can seize internally, preventing the latch from moving. If the motor receives power and hums but the latch does not move, the entire lock motor assembly likely needs replacement.

  5. 05

    Failed control module

    Part replacement

    A control board that is not correctly generating the drive signal to the lock motor can trigger F94 even when the lock assembly itself is in good condition. This is typically diagnosed after the lock motor, switch, and wiring have been confirmed functional.

See the test procedure for each cause

Frequently asked questions about F94

What does F94 mean on a Bosch range?
F94 means the oven door lock mechanism exceeded its maximum number of lock attempts without successfully confirming that the door was locked. This happens during a self-clean cycle or a manual oven lockout operation. The control module stops the cycle and displays F94 to indicate the lock system needs diagnosis before the oven can continue.
Can I fix the F94 error myself?
Some causes of F94 are DIY-friendly. Inspecting and cleaning debris or carbon buildup from around the door latch costs nothing and requires no parts. Testing the lock motor windings and the wiring harness with a multimeter is also within reach for a knowledgeable DIYer. Replacing the lock motor assembly or control board involves working near electrical components and is generally better handled by a qualified technician.
Will resetting the oven clear the F94 error?
Resetting the oven by cutting power at the breaker may temporarily clear the F94 code, but the error will return as soon as the oven attempts to lock the door again if the underlying fault has not been corrected. A reset is useful for confirming whether the error is persistent, but it is not a repair. The root cause in the lock motor, switch, or wiring must be addressed.
Is it safe to use my Bosch oven while the F94 code is active?
Standard baking and broiling functions may still operate, but the self-clean cycle and oven lockout feature will not function properly while F94 is present. Avoid running the self-clean cycle until the door lock issue is resolved, as an unlocked oven door during a high-temperature cleaning cycle is a safety concern. It is best to diagnose and repair the fault before relying on any function that requires door locking.
How much does it cost to repair an F94 error on a Bosch range?
Repair costs depend on the specific failed component. A replacement lock motor assembly typically falls in the range of $40 to $120 for the part. If a control board replacement is needed, parts alone can range from $150 to $400 or more. Adding professional labor, total repair costs generally range from $100 to $500 depending on the diagnosis and the technician's rates in your area.

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