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ErrBase

Bosch Washer Error Codes

All Bosch washer error codes with step-by-step troubleshooting, multimeter specs, and OEM part numbers.

8 error codes

CodeMeaning
E18 is the Bosch drain fault code, indicating the water level pressure switch failed to confirm an empty drum within the drain cycle's allotted time. The washer stops mid-cycle to protect the motor and prevent water from overflowing the drum or backing up into the cabinet.
moderatebeginner
E17The E17 code fires when the control board runs a timer during the fill cycle and water doesn't reach the target level in time. The flow meter isn't counting enough pulses, basically. Water's either not moving fast enough or not moving at all.
moderatebeginner
E18The washer tried to drain for its maximum allowed time, usually 8-10 minutes, and the water level didn't drop enough. So the board threw the E18 and killed the cycle to protect the pump motor from running hot and burning out.
moderatebeginner
E23The E23 error code signifies that the Bosch Aquastop system has detected water in the internal base tray, indicating a leak inside the cabinet.
highintermediate
HUBBosch front-loaders display E-codes on the digital panel when a sensor reading falls outside the expected range. The EMS control module logs the fault and stops the cycle to prevent component damage. Each number maps to a specific subsystem: water, motor, door, heating, or drainage.
moderatebeginner
LEAKINGYour Bosch washer is letting water escape somewhere it shouldn't. This could be through a degraded door boot seal, a clogged dispenser channel forcing overflow, a loose pump connection dripping during drains, or the AquaStop safety valve firing because it detected moisture collecting in the base pan.
moderateintermediate
NOT-DRAININGE18 means the control board timed out waiting for the water level sensor to drop during a drain cycle. The machine tried to pump water out but the pressure sensor still reads water present after the allotted time. Either something's blocking the pump, or the pump can't generate enough flow to clear the line.
moderateintermediate
NOT-SPINNINGThe EcoSilence Drive is Bosch's brushless direct-drive motor. When the washer won't spin, it's usually because the E18 drain error fired first. The machine detects it can't clear water fast enough, so it locks out the spin cycle entirely. Could be a clogged pump, a failed impeller, or a bad pump motor winding.
moderateintermediate