Bosch Washer Error Code E:24

Error code E:24 on a Bosch washer indicates that the pressure sensor is producing a voltage level outside of its acceptable operating range. The pressure sensor, also called a water level sensor or pressure switch, monitors the water level inside the drum by detecting air pressure changes through a small tube connected to the tub. When the control board reads a voltage signal from this sensor that falls outside expected parameters, it flags E:24 and halts operation to prevent potential flooding or improper cycle execution.

The two primary causes of this fault are a defective pressure sensor itself or a problem in the wire harness connecting the sensor to the control board. A failed sensor may output a constant high or low voltage rather than a dynamic signal that changes with water level. Wiring issues such as a broken conductor, corroded connector pins, or a loose terminal can produce the same abnormal voltage reading at the control board. The plastic air pressure tube leading to the sensor can also factor in if it is kinked, cracked, or clogged, though the fault code points specifically to a voltage failure.

Diagnosis begins with running test program P8, which exercises the pressure sensor circuit and allows the technician to observe real-time sensor behavior. During this test, inspect the sensor's wiring harness for visible damage, corrosion at connectors, and secure terminal seating. If the harness checks out, the sensor itself should be tested or replaced. Resistance and voltage readings from the sensor should be compared against specification values to confirm whether the component is within range.