What Does Error Code E92 Mean on a Bosch Washing Machine?

Bosch Updated 8 April 2026
Quick Fix

Perform a full power cycle by switching the machine off at the wall socket, waiting 10 minutes, then switching it back on and restarting your programme — this clears temporary software glitches in the majority of E92 cases (takes about 5 minutes).

Fault description

Error code E92 points to a breakdown in communication between the internal software and the printed circuit board (PCB) inside your Bosch washing machine. The PCB acts as the brain of the appliance, coordinating everything from drum rotation to water temperature. When the software cannot reliably exchange data with the board — or between modules on the board itself — the machine raises E92 and halts the current programme to prevent further damage.

When this error appears, the machine will typically stop mid-cycle or refuse to start a new one. The display may flash E92 continuously or show it alongside a locked door light. In most cases the drum will not spin and no water will be pumped in or out until the fault is cleared. While the error sounds serious, a significant proportion of E92 faults are caused by temporary software glitches that a simple power reset will resolve.

Causes

  • Temporary software glitch — A brief voltage fluctuation or power interruption during a cycle can corrupt the working memory of the control board, causing it to lose internal communication. This is the most common trigger and is usually resolved by a full power cycle.
  • Faulty or failing main control board (PCB) — Over time, solder joints on the PCB can crack, capacitors can degrade, and onboard components can fail, all of which disrupt the communication pathways between modules. If the error returns repeatedly after resets, the board itself may need testing or replacement.
  • Damaged or loose wiring harness — The ribbon cables and wiring looms that connect the main PCB to the motor control board, display module, and other components can work loose through vibration over years of use. A poor connection at any of these points can trigger an E92 fault.
  • Corrupted or outdated firmware — In some Bosch models, the onboard firmware can become corrupted following a power surge or an interrupted update cycle. This can cause persistent communication errors that a standard reset will not fix.
  • Secondary module failure (motor control board or display board) — The main PCB communicates with sub-modules including the motor inverter board and the user interface board. If one of these secondary boards develops a fault, the main board may report E92 because it cannot complete its communication handshake.

Step-by-Step Fix

  1. 1

    Power cycle the machine

    Turn the programme selector to the off position, then switch the machine off at the wall socket. Leave it unplugged for a full 10 minutes — not just 30 seconds — to allow the capacitors on the board to fully discharge and the software to reset. Plug back in, select a short programme, and observe whether E92 returns.

  2. 2

    Check the power supply for fluctuations

    Plug the washing machine into a different socket or test the current socket with another appliance to confirm it is delivering a stable supply. Avoid using extension leads or multi-socket adaptors with washing machines, as these can cause the voltage irregularities that trigger software faults.

  3. 3

    Inspect the door and programme selector

    A faulty door latch or a worn programme selector can sometimes generate spurious signals that the PCB misinterprets as a communication error. Make sure the door clicks firmly shut and that the selector dial moves cleanly between positions without feeling loose or gritty.

  4. 4

    Check accessible wiring connections

    With the machine unplugged, remove the top panel (usually secured by two screws at the rear). Locate the main PCB and gently press each wiring connector firmly onto its socket — vibration can cause these to work slightly loose over time. Do not disconnect and reconnect any ribbon cables unless you are confident doing so, as they can be fragile.

  5. 5

    Perform a factory reset if your model supports it

    Some Bosch washing machine models allow a deeper software reset by holding the Start button for 5 seconds while the machine is in standby, or by turning the selector through a specific sequence — check your model's user manual for the exact procedure. A factory reset clears stored error logs and reinitialises the software, which can resolve persistent E92 faults caused by corrupted settings.

  6. 6

    Note the pattern of the fault before calling for help

    If E92 keeps returning, record when it appears — at the start of a cycle, mid-wash, or during spin — and whether it happens on every programme or only specific ones. This information will help a service technician diagnose whether the fault lies with the main PCB, a secondary module, or the wiring between them, potentially saving diagnostic time and cost.

Affected models

When to call a service technician

If E92 returns every time you run the machine despite completing all the steps above, or if the machine shows additional symptoms such as burning smell, visible scorch marks near the PCB area, or completely unresponsive controls, stop using the appliance and contact a qualified service technician. These signs suggest the control board has suffered physical damage that cannot be resolved through resets or simple adjustments.

You should also call a service technician if the error appears alongside other fault codes, particularly those relating to the motor or drive system, as this may indicate a secondary module has failed and is pulling the main board into a fault state. Attempting to diagnose or replace PCB components without the correct tools and training risks further damage to the machine.

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Frequently Asked Questions

Will a power reset always fix error code E92 on a Bosch washing machine?

A power reset fixes E92 in many cases, particularly when the fault is caused by a temporary software glitch following a power fluctuation. However, if the underlying cause is a failing PCB, damaged wiring, or a faulty secondary module, the error will return after the reset. If E92 comes back more than twice, further investigation is needed.

Is it safe to keep using my Bosch washing machine while it shows E92?

It is not advisable to continue running the machine while E92 is active. The machine will usually lock itself out to prevent damage, but repeatedly forcing it through cycles with an unresolved PCB communication fault can cause additional stress to the control board and connected components. Resolve the fault first before resuming normal use.

How much does it cost to replace a Bosch washing machine PCB?

Main control PCBs for Bosch washing machines typically cost between £80 and £200 for the part alone, depending on the model. Labour charges from a service technician will add to this. It is worth getting a diagnostic visit first, as the fault may lie with a cheaper component such as the wiring harness rather than the board itself.

Can a software update fix error E92 on a Bosch washing machine?

In some cases, yes. If the E92 fault is linked to corrupted or outdated firmware, a service technician can reflash or update the software on the control board using specialist equipment. This is not something a homeowner can do independently, but it can be a cost-effective fix compared to replacing the entire PCB.

Does error E92 appear on all Bosch washing machine models?

E92 is reported across a range of Bosch washing machine models rather than being specific to one series. The exact behaviour and the sub-components involved can vary slightly between models, which is why it is important to have your full model number to hand when ordering parts or speaking to a service technician.