Bosch Washer Error Code Er:15

Er:15 means the washer's control board could not successfully calibrate the pressure sensor during its self-check routine. The pressure sensor monitors water levels inside the drum, and this error appears when the sensor or its wiring circuit does not respond as expected. The washer will not operate normally until the fault is resolved.

A reset may temporarily clear the error code from the display, but it will return as soon as the washer attempts to run the pressure sensor calibration again. The underlying hardware issue, whether a faulty sensor, damaged harness, or blocked hose, must be identified and corrected for the error to clear permanently.

Repair costs depend on which component has failed. If only a wire harness connector needs reseating or cleaning, the repair may cost little to nothing beyond your time. A replacement pressure sensor typically runs in the range of $25 to $75 for the part, while a technician service call including labor and parts can range from $100 to $250 or more depending on your location and the specific diagnosis.

Start by running the built-in service test P8, which is specifically designed to diagnose the pressure sensor circuit on Bosch washers. Inspect the wire harness connecting the sensor to the control board for damage, corrosion, or loose connectors, and also check the small air hose that runs from the tub to the sensor for kinks or blockages. If the harness and hose are intact, the pressure sensor itself likely needs to be replaced.

It is not recommended to continue using the washer while Er:15 is active. The pressure sensor controls water fill levels, and if it is malfunctioning, the machine could potentially overfill or behave unpredictably during a wash cycle. Addressing the fault before resuming normal use is the safer approach.