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Error code reference

Bosch Washer Error Code E:05

Door control broken

Bosch codesBosch washer codes

Door control broken — faulty Triac/control module or oversudsing causing washer to lock thinking it has overfilled.

First step from the service manual

Check for oversudsing; if not present, check Triac and control module.

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

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What E:05 means on a Bosch washer

The E:05 error code on a Bosch washer indicates a door control fault. The machine's control system has detected a condition it interprets as the door being improperly locked or the drum being overfilled, triggering a protective lockout. This code points specifically to a failure in the door locking circuit, which is governed by a Triac component on the control module. The Triac is a bidirectional semiconductor switch responsible for controlling the door lock mechanism. When it fails or receives incorrect signals, the washer cannot confirm door status and halts operation.

A secondary but equally common cause of E:05 is excessive sudsing inside the drum. When too much foam is generated, typically from using non-HE detergent or too much detergent in an HE machine, the washer's sensors can misread foam pressure as an overfill condition. The control module then interprets this as a door safety risk and engages the error lockout. This is why the first diagnostic step is to visually inspect for oversudsing before assuming an electrical fault.

If oversudsing is ruled out, the fault likely lies in the Triac itself or the broader control module. A failed Triac can no longer properly switch the door lock solenoid, leaving the system unable to confirm lock engagement. In some cases the entire control module requires replacement if the Triac is integrated and not serviceable as a standalone component. Diagnosis should proceed from the simplest cause (detergent use habits) through to component-level electrical testing of the door lock circuit and control board.

Source: manufacturer service documentation.

Common causes of E:05

  1. 01

    Oversudsing from incorrect detergent

    Wiring / connection

    Using regular detergent in a high-efficiency washer, or using too much HE detergent, generates excessive foam that the sensors misread as an overfill condition. Look inside the drum door glass for thick, persistent suds during or after a cycle.

  2. 02

    Failed Triac on the control module

    Part replacement

    The Triac is a semiconductor switch on the control board that operates the door lock circuit. When it fails, the control system loses the ability to confirm door lock status and triggers E:05. This requires electrical testing of the control board.

  3. 03

    Faulty control module

    Part replacement

    If the Triac is integrated into the main control module or if broader board damage is present, the entire control module may be at fault. Symptoms include recurring E:05 after ruling out detergent issues and verifying the door lock mechanism is physically intact.

  4. 04

    Defective door lock assembly

    Part replacement

    A mechanically or electrically failed door lock solenoid can prevent the control board from receiving a proper lock confirmation signal, leading the system to trigger the door control error. Inspect the lock for physical damage and test for correct electrical continuity.

See the test procedure for each cause

Frequently asked questions about E:05

What does E:05 mean on a Bosch washer?
E:05 on a Bosch washer indicates a door control fault. The machine has detected a problem with the door locking circuit, which can be caused by oversudsing inside the drum or by a failed Triac or control module. The washer stops operation as a safety measure until the condition is resolved. Start by checking whether excessive suds are present before moving to electrical component diagnosis.
Can I fix E:05 on my Bosch washer myself?
If the cause is oversudsing, you can resolve it yourself by running a rinse-only cycle, reducing detergent quantity, and switching to a proper HE-rated detergent. If the error persists after addressing detergent use, the repair involves testing and potentially replacing the Triac or control module, which requires comfort with appliance electronics and is best handled by a qualified technician.
Will resetting my Bosch washer clear the E:05 error?
A reset may temporarily clear the E:05 code, but it will return if the underlying cause is not addressed. If oversudsing triggered the error, clearing the suds and running a fresh cycle may resolve it permanently. If a Triac or control module fault is responsible, the error will reappear because the hardware fault remains present regardless of resets.
Is it safe to use my washer when E:05 is displayed?
No. When E:05 is active, the washer has halted operation because it cannot confirm the door is properly locked. Running the machine in this condition is unsafe, as the door lock status is unverified. Do not attempt to bypass the error or force the machine to run until the fault has been diagnosed and corrected.
How much does it cost to repair an E:05 error on a Bosch washer?
If the issue is only detergent-related, there is no repair cost beyond switching to the correct detergent. Replacement of a door lock assembly typically falls in the range of $80 to $200 including parts and labor. Control module replacement tends to be more expensive, generally ranging from $200 to $450 or more depending on the specific model and service rates in your area.

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