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Error code reference

Bosch Washer Error Code F:16

Door lock open

Bosch codesBosch washer codes

Door lock open — door is open or door switch is not actuated.

First step from the service manual

Close door, check door lock, 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:16 means on a Bosch washer

The F:16 error code on a Bosch washer indicates that the control board has detected the door lock circuit in an open or unactuated state. The washer's control system continuously monitors the door lock assembly to confirm the door is securely latched before allowing a wash cycle to begin or continue. When the door switch fails to send the expected closed-circuit signal, the machine halts operation and displays F:16 to prevent running with an unsecured door.

The door lock assembly contains a switch that completes a circuit when the door latch engages the lock mechanism. If the door is physically open, not fully pushed shut, or the latch is not seating properly, the switch will not actuate and the error triggers immediately. Beyond the physical door position, a faulty door lock assembly with a worn or broken switch contact is one of the more common hardware causes of this fault.

The wire harness connecting the door lock assembly to the main control board is also a key diagnostic area. A loose connector, corroded terminal, or damaged wire in this harness can interrupt the signal even when the lock mechanism itself is functioning correctly. Technicians should start by confirming the door is fully closed, then inspect the harness connections at both the door lock and control board ends, and finally test the door lock switch for continuity before concluding the lock assembly requires replacement.

Source: manufacturer service documentation.

Common causes of F:16

  1. 01

    Door not fully latched

    Wiring / connection

    The most frequent cause is simply that the door was not pushed firmly enough to engage the latch. Press the door closed until an audible click confirms the latch has seated, then attempt to restart the cycle.

  2. 02

    Faulty door lock assembly

    Part replacement

    The switch inside the door lock assembly can wear out or fail mechanically, preventing it from sending a closed-circuit signal to the control board even when the door is physically shut. Testing the switch for continuity will confirm whether the assembly needs replacement.

  3. 03

    Loose or damaged wire harness

    Wiring / connection

    A disconnected connector, corroded terminal, or broken wire in the harness between the door lock and the control board will interrupt the signal and trigger F:16. Inspect the harness at both connection points for damage or looseness.

  4. 04

    Worn or broken door latch striker

    Part replacement

    The plastic or metal striker on the door itself that engages the lock mechanism can crack or break over time, preventing the lock switch from actuating fully. Visually inspect the door striker for any visible damage or deformation.

  5. 05

    Control board fault

    Part replacement

    In rare cases, the main control board may fail to correctly read the door lock signal even when the lock and wiring are intact. This is typically diagnosed only after all other components have been tested and confirmed good.

See the test procedure for each cause

Frequently asked questions about F:16

What does F:16 mean on a Bosch washer?
F:16 means the washer's control system is detecting that the door lock circuit is open, indicating the door is either not closed or the door lock switch has not been actuated. The washer will not run a cycle until it receives a confirmed signal that the door is securely latched. This is a safety feature designed to prevent the machine from operating with an unsecured door.
How do I fix the F:16 error on my Bosch washer?
Start by firmly pushing the door closed until you hear a click, then try restarting the washer. If the error persists, inspect the wire harness connecting the door lock to the control board for loose or damaged connections. If the wiring looks intact, the door lock assembly itself may need to be tested for continuity and potentially replaced.
Will resetting my Bosch washer clear the F:16 error?
A reset may temporarily clear the error code, but it will return immediately if the underlying cause has not been resolved. If the door is not fully latching or the door lock switch is faulty, the fault will reappear as soon as the washer attempts to start a cycle. Address the physical cause before relying on a reset.
Is it safe to use my Bosch washer when F:16 is displayed?
No, the washer will not allow a cycle to run while F:16 is active, and this is intentional. Running a washer with an unconfirmed door latch could result in the door opening during a cycle, causing water to spray out. Do not attempt to bypass the door lock circuit.
How much does it cost to repair a Bosch washer showing F:16?
If only a wire harness connector needs to be reseated, the repair can cost very little beyond your own time. Replacing a door lock assembly typically involves parts costs in the range of $30 to $100 depending on the specific model, plus labor if a technician performs the work. A control board replacement, if needed, would be significantly more expensive.

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