Understanding Bosch Washer Error Codes
This guide covers bosch washer error codes: complete reference with step-by-step instructions from certified Bosch technicians. When your Bosch washer detects a problem, it displays an error code on the control panel. These codes help you — and technicians — identify the issue quickly. Some codes point to simple fixes you can do yourself; others indicate component failures that need professional repair.
Common Bosch Washer Error Codes
E02 — Motor Problem
The motor control board detected an issue with the drive motor. This can be a wiring problem, a failed motor, or a faulty control module. Try resetting the washer by unplugging it for 5 minutes. If E02 returns, schedule service.
E04 — Leak Detected (AquaStop)
The AquaStop system detected water in the base pan. The washer shuts down to prevent flooding. Check the drain hose connections and the door boot gasket for leaks. Tilt the washer slightly to drain the base pan, then restart. If the code persists, the AquaStop valve or a internal hose may be leaking.
E13 — Water Fill Timeout
The washer didn’t fill with enough water within the allotted time. Check that both hot and cold water supply valves are fully open. Inspect the inlet hose screens (fine mesh filters at the valve connections) for mineral deposits. Clean the screens by removing the hoses and rinsing the screens under water.
E17 / E18 — Drain Timeout
The washer couldn’t drain within the expected time. Clean the drain pump filter, check the drain hose for kinks, and verify the drain hose height is between 24″ and 36″ above the floor.
E21 — Motor Not Turning
The drum isn’t spinning despite the motor receiving power. This can indicate a worn motor carbon brush (on older models), a jammed drum, or a broken drive belt. Check if the drum turns freely by hand with the washer off.
E27 — Door Lock Error
The door lock mechanism failed to engage. Make sure nothing is caught in the door seal preventing full closure. Try pressing the door firmly. If the lock mechanism clicks but the code remains, the door lock actuator may need replacement.
E28 — Sensor Error
A sensor (typically the pressure sensor or temperature sensor) is reading out of range. This is usually a component failure that requires professional diagnosis.
E29 — Water Not Draining (Flow Sensor)
Similar to E17/E18 but specifically involves the flow sensor detecting that water isn’t moving through the drain path. Clean the drain filter and check the drain pump impeller for obstructions.
E33 — Anti-Flood Sensor Active
The pressure sensor detects an abnormally high water level. The washer stops filling as a safety measure. This can be caused by a faulty water inlet valve that doesn’t close or a malfunctioning pressure sensor.
Resetting Your Bosch Washer
For intermittent codes that don’t indicate a persistent problem:
- Press and hold the Start/Pause button for 3 seconds to cancel the current cycle
- Turn the program dial to Off
- Unplug the washer for 60 seconds
- Plug it back in and run a test cycle
If the code returns, the underlying issue hasn’t been resolved and you should schedule professional service.
When to Call a Technician
Self-serviceable codes: E04 (check connections), E13 (check water supply), E17/E18 (clean filter), E27 (check door). All other codes typically require professional diagnosis with a multimeter and access to Bosch diagnostic software.
Maintaining your Bosch Washer long-term
Regular maintenance extends the lifespan of your Bosch Washer and prevents many common issues before they require professional repair. Bosch engineers design every component to meet strict performance and durability standards, but normal wear and environmental factors affect operation over time.
Keep your appliance rating plate information accessible — model number, serial number, and production date are essential for ordering correct replacement parts. The rating plate is typically located inside the door, on the back panel, or along the side wall. Having this information ready when you contact support reduces diagnostic time and ensures your technician arrives with the right components.
