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Error code reference

Bosch Range Error Code F93

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

Bosch codesBosch range codes

Maximum oven door lock time 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 F93 means on a Bosch range

The F93 error code on a Bosch range indicates that the oven door lock mechanism failed to complete its locking or unlocking cycle within the expected time limit. This fault occurs during two specific operations: a self-clean cycle, where the door must lock before high-temperature cleaning begins, or during an oven lockout mode. The door lock system consists of a lock motor assembly with an integrated position switch that signals the control module once the latch has reached its fully locked or fully unlocked position. When that confirmation signal does not arrive within the allotted time window, the control module logs F93 and halts the operation.

The diagnosis splits into two primary branches depending on whether the lock motor is running at all. If the motor runs but the cycle still times out, the issue typically lies in the wiring path between the control module and the lock switch on the motor assembly, or in the switch itself failing to close and send a valid position signal. A continuity test of that wiring harness segment will identify open circuits or damaged conductors. If the motor does not run at all, the winding resistance of the lock motor must be tested directly to determine whether the motor has an internal open or short.

Additional causes can include a physical obstruction preventing the latch bolt from traveling its full stroke, a door hinge or gasket misalignment that puts mechanical resistance on the latch, or a failed control module that is not sending the correct drive signal to the motor in the first place. Inspecting the latch mechanism for debris, warping, or wear is a useful early step before electrical testing begins.

Source: manufacturer service documentation.

Common causes of F93

  1. 01

    Faulty lock switch or open wiring to lock switch

    Part replacement

    If the lock motor runs but the control module never receives a position confirmation, the lock switch on the motor assembly or the wiring between it and the control board is the most likely culprit. Test continuity of the wiring harness and the switch contacts directly.

  2. 02

    Failed lock motor

    Part replacement

    If the lock motor does not run at all, the motor windings may have an open circuit or a short. Test the winding resistance with a multimeter; a reading that is open or dramatically out of specification indicates the motor needs replacement.

  3. 03

    Mechanical obstruction or latch misalignment

    Wiring / connection

    Food debris, grease buildup, or a warped door latch housing can prevent the lock bolt from completing its full travel, causing the motor to stall or run without reaching the locked position. Visually inspect and clean the latch mechanism before electrical testing.

  4. 04

    Damaged wiring harness between control module and lock assembly

    Part replacement

    Heat exposure near the oven cavity can degrade wire insulation over time, leading to intermittent open circuits in the harness segment serving the lock motor. A continuity check of each conductor from the control board connector to the lock assembly will identify breaks.

  5. 05

    Defective control module

    Part replacement

    If the wiring, lock switch, and motor all test within spec, the control module itself may not be generating the correct drive signal to activate the lock motor. This is the least common cause and is typically diagnosed after all other components have been ruled out.

See the test procedure for each cause

Frequently asked questions about F93

What does F93 mean on a Bosch range?
F93 means the oven door lock system exceeded its maximum allowed time to complete a locking or unlocking cycle. This happens during a self-clean cycle or an oven lockout operation. The control module expects a confirmation signal from the lock position switch within a set time window, and when that signal does not arrive, F93 is triggered and the operation is halted.
Will resetting the range clear the F93 error code?
Powering the range off at the breaker for a few minutes may temporarily clear the F93 code, but if the underlying problem with the lock motor, switch, or wiring is not repaired, the error will return as soon as a self-clean or lockout operation is attempted again. A reset is useful for confirming whether the fault is intermittent, but it is not a permanent fix.
Is it safe to use the oven while the F93 code is active?
Standard baking and broiling functions may still be available depending on the state of the fault, but you should avoid starting a self-clean cycle until the lock mechanism is repaired. A door lock that cannot complete its cycle means the self-clean safety interlock is compromised. Resolve the fault before running any high-temperature operation.
How do I fix the F93 error on my Bosch range?
Start by checking whether the lock motor runs when a self-clean or lockout cycle is initiated. If the motor runs, test continuity of the wiring between the control module and the lock switch on the lock motor assembly, then test the switch itself. If the motor does not run, test the motor winding resistance with a multimeter to determine if the motor is open or shorted. Also inspect the latch mechanism for any physical obstruction that could prevent full travel.
How much does it cost to repair a Bosch range F93 error?
Repair costs vary based on the faulty component. A replacement door lock motor assembly typically ranges from around 50 to 150 dollars for the part alone. If a control module replacement is needed, parts can run from 150 to 350 dollars or more. Adding professional labor will increase the total, generally bringing a complete repair to somewhere between 150 and 500 dollars depending on diagnosis complexity and your location.

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