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Error code reference

Bosch Washer Error Code 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 16 means on a Bosch washer

Error code 16 on a Bosch washer indicates that the control board has detected an open door lock circuit, meaning the machine cannot confirm the door is properly latched and locked before beginning or continuing a wash cycle. The door lock system on Bosch washers relies on a latch mechanism, an electromechanical lock actuator, and a door switch that sends a signal back to the control board confirming secure closure. If that signal is absent or interrupted, the board throws error 16 and refuses to operate as a safety measure to prevent water from dispensing into an unsecured drum.

The most straightforward cause is a door that is simply not fully closed. Even slight resistance from laundry caught in the door gasket can prevent the latch from seating fully and actuating the switch. Beyond that, the door lock assembly itself can fail mechanically or electrically, leaving the switch open even when the door appears closed. A broken door latch striker on the door itself can also prevent proper engagement with the lock mechanism.

The wiring harness connecting the door lock assembly to the control board is another critical point of failure. Loose connector pins, chafed insulation, or a broken wire in this harness can interrupt the signal even if the lock assembly is physically functional. Diagnosis should begin by confirming the door closes and latches firmly, then inspecting the lock assembly for visible damage, and finally checking continuity through the harness and at the connector terminals.

Source: manufacturer service documentation.

Common causes of 16

  1. 01

    Door not fully closed

    Wiring / connection

    Clothing or debris caught in the door gasket can prevent the latch from seating completely and actuating the door switch. Open the door, clear the gasket, and press the door firmly shut until you hear a definitive click.

  2. 02

    Faulty door lock assembly

    Part replacement

    The electromechanical door lock can fail internally, leaving the switch contacts open even when the door is latched. If the door closes firmly but the error persists, the lock assembly likely needs replacement.

  3. 03

    Broken door latch striker

    Part replacement

    The plastic or metal striker on the door itself engages the lock mechanism. If the striker is cracked or broken, it will not push the switch actuator far enough to register a closed signal.

  4. 04

    Wiring harness issue

    Wiring / connection

    A loose connector, corroded terminal, or damaged wire between the door lock assembly and the control board can interrupt the door-closed signal. Inspect the harness and connectors at both ends for continuity and secure seating.

  5. 05

    Control board fault

    Part replacement

    In rare cases the control board itself may fail to read the door lock signal correctly even when all other components test correctly. This is typically diagnosed only after the lock assembly and harness have been ruled out.

See the test procedure for each cause

Frequently asked questions about 16

What does 16 mean on a Bosch washer?
Error code 16 means the washer's control board cannot detect that the door is closed and locked. The door lock circuit is open, so the machine will not start or continue a cycle. This is a safety interlock designed to prevent the washer from operating with an unsecured door.
How do I fix error code 16 on my Bosch washer?
Start by making sure the door is completely free of obstructions and press it firmly closed until it clicks. If the error returns, inspect the door latch striker and the door lock assembly for visible damage. Check that the wiring harness connector at the lock assembly is fully seated. If the lock assembly is faulty, it will need to be replaced.
Will resetting my Bosch washer clear error code 16?
A reset may temporarily clear the error code, but if the underlying cause is a faulty door lock, damaged striker, or wiring problem, the code will return as soon as you attempt to run a cycle. Address the root cause before relying on a reset to clear the error.
Is it safe to use my Bosch washer when error code 16 is showing?
No. The washer is intentionally preventing operation because it cannot confirm the door is securely locked. Running the machine with an unsecured door risks water leaking from the drum opening, which can cause water damage and create a slip hazard. Resolve the error before using the machine.
How much does it cost to repair a Bosch washer door lock that causes error 16?
If the door lock assembly needs replacement, parts typically range from $30 to $80 depending on the specific model, with professional labor adding $80 to $150 or more depending on your location. If only the wiring harness or connector needs attention, the repair cost can be significantly lower.

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