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Error code reference

Bosch Washer Error Code F:34

Door lock cannot be locked

Bosch codesBosch washer codes

Door lock cannot be locked — door lock broken, door hook stuck, door stuck, or stiff gasket.

First step from the service manual

Reset error with OFF and ON, check door lock, check mechanic, check wire harness.

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

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What F:34 means on a Bosch washer

The F:34 error code on a Bosch washer indicates that the door lock mechanism has failed to engage or complete its locking cycle. The door lock system relies on a solenoid-actuated latch that must reach a fully locked position before the control board will permit the wash cycle to begin. When the control board sends the lock signal and does not receive confirmation that the lock has engaged, it triggers F:34 and halts operation to prevent the door from opening during a spin cycle.

Several mechanical and electrical conditions can produce this fault. The door lock assembly itself may have failed internally, either through a burned-out solenoid or a broken latch mechanism. The door hook, which is the plastic or metal tab on the door that physically engages the lock, can become bent, cracked, or misaligned, preventing proper engagement. A door that is warped, swollen, or obstructed will not close with enough force to allow the hook to seat fully. The door gasket can also become stiff or deformed over time, creating enough resistance to prevent the door from fully closing and seating against the lock.

On the electrical side, the wire harness connecting the door lock assembly to the control board should be inspected for damaged insulation, corroded terminals, or loose connectors. A broken wire in this harness can interrupt the feedback signal from the lock sensor even if the mechanical components are functioning correctly. The recommended first step is to power the machine off and back on to reset the fault, then perform a thorough inspection of the door lock assembly, door hook alignment, gasket condition, and wiring harness before replacing any components.

Source: manufacturer service documentation.

Common causes of F:34

  1. 01

    Faulty door lock assembly

    Part replacement

    The door lock solenoid or internal latch mechanism has failed and is no longer engaging when triggered. This is the most common cause and is confirmed when the lock does not audibly click or engage after the door is firmly closed.

  2. 02

    Bent or damaged door hook

    Part replacement

    The door hook is the tab on the door that inserts into the lock. If it is cracked, bent, or broken, it will not engage the latch properly. Visually inspect the hook for any deformation or damage.

  3. 03

    Stiff or deformed door gasket

    Part replacement

    A hardened or warped door gasket can prevent the door from closing fully, stopping the hook from reaching the lock. Check whether the gasket creates unusual resistance when closing the door.

  4. 04

    Door misalignment or obstruction

    Wiring / connection

    If the washer has shifted or the door hinge has loosened, the door may no longer align correctly with the lock receiver. Check that the door closes evenly and that no clothing or debris is caught in the door opening.

  5. 05

    Damaged or loose wire harness

    Wiring / connection

    A broken wire or corroded connector in the harness between the door lock and the control board can prevent the lock confirmation signal from reaching the board. Inspect all terminals and connectors at the door lock assembly for corrosion, looseness, or visible damage.

See the test procedure for each cause

Frequently asked questions about F:34

What does F:34 mean on a Bosch washer?
F:34 means the washer attempted to lock the door but could not confirm that the lock engaged successfully. The machine will not start a cycle until this condition is resolved. The cause can be a failed door lock assembly, a damaged door hook, a stiff gasket, or a wiring issue.
Can I fix the F:34 error myself?
Some causes of F:34 are DIY-friendly. Start by powering the washer off and back on to reset the fault, then inspect the door hook, gasket, and door alignment. If the door lock assembly itself has failed, replacing it requires disconnecting the harness and removing the front panel or door boot, which is a moderate-difficulty repair that many experienced DIYers can complete.
Will resetting the washer clear the F:34 error?
Turning the washer off and back on will clear the displayed error temporarily, but if the underlying cause has not been addressed, the code will return as soon as the machine attempts to lock the door again. A reset is only a useful first step to rule out a one-time glitch, not a permanent fix.
Is it safe to use my Bosch washer while it shows F:34?
No. The washer displays F:34 and refuses to run precisely because it cannot confirm the door is securely locked. Running a washer with an unconfirmed door lock creates a risk of the door opening during a spin cycle, which could cause water damage or injury. Do not attempt to bypass this fault.
How much does it cost to repair the F:34 error on a Bosch washer?
If only the door lock assembly needs replacement, parts typically range from $30 to $80 depending on the specific model, and a technician visit to diagnose and replace the part often brings the total to $100 to $250. If the door hook or gasket is the culprit, parts costs are generally lower, though labor rates vary by region.

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