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Flashing error codes on a Bosch dishwasher display typically indicate a sensor malfunction, water intake/drain issue, or heating element problem. Common codes like E15 (AquaStop activated), E24/E25 (drainage issues), or E09 (heating fault) point to specific system failures. These errors often result in the dishwasher failing to start, stopping mid-cycle, or not cleaning dishes effectively due to improper water levels or temperatures.
You'll likely need a multi-meter (USD 20-50) to test continuity of components like the heating element or NTC sensor. A Torx screwdriver set (USD 15-30) is essential for accessing internal components, especially the control panel or base pan. Specific replacement parts such as a new drain pump (USD 60-120) or an AquaStop valve (USD 80-150) might be required depending on the error code.
Always disconnect the dishwasher from its power supply by unplugging it or shutting off the circuit breaker before beginning any inspection or repair. Turn off the water supply valve to the dishwasher to prevent accidental leaks or flooding, especially when dealing with water intake components. Be cautious of sharp edges inside the appliance and potential residual hot water if the machine recently completed a cycle.
If the error code persists after basic troubleshooting and points to a control module (main PCB) failure, professional replacement is often necessary due to complex programming and cost. Persistent E09 errors indicating a faulty flow-through heater or E15 errors where the AquaStop system is genuinely triggered by an internal leak often require a technician for precise diagnosis and repair. Issues involving complex wiring harnesses or multiple component failures that are difficult to isolate without specialized diagnostic tools are best left to a certified Bosch technician.
An E15 error indicates that the AquaStop system has been activated, usually due to water detected in the base pan. This often points to a leak from a hose, pump, or seal within the appliance.
To reset, press and hold the Start button for 3-5 seconds until the display clears, then close the door. Alternatively, unplug the dishwasher for 5-10 minutes to perform a hard reset.
These codes indicate a drainage issue. First, check the drain filter for blockages and ensure the drain hose isn't kinked or obstructed, especially where it connects to the sink's plumbing.
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