Bosch Washer Error Code F:26

The F:26 code on a Bosch washer indicates an error with the analog pressure sensor, which monitors the water level in the drum. The control board has detected a voltage signal from the sensor that is outside the acceptable range. This can be caused by a faulty sensor, a blocked pressure hose, or a wiring issue in the harness connecting the sensor to the control board.

Some causes of the F:26 error are DIY-friendly, particularly inspecting and clearing a blocked pressure hose or checking harness connections for looseness or corrosion. Replacing the pressure sensor is also a straightforward repair for someone comfortable working with appliance components. If the main control board is involved or you are unsure about working with electrical components, a qualified technician is recommended.

If the fix is simply clearing a blocked pressure hose, the repair may cost little to nothing beyond your time. Replacing a pressure sensor typically involves parts costs in the range of $20 to $60, plus labor if a technician is hired. A full service call from a technician, including diagnosis and parts, can range from $100 to $250 or more depending on your location and the parts required.

Turning the washer off and back on is the recommended first step and can clear the code if it was triggered by a temporary electrical glitch. However, if the fault is caused by a physically blocked hose, damaged wire harness, or a failed pressure sensor, the code will return after the reset. A reset alone is not a fix if there is an underlying hardware problem.

It is not advisable to continue running the washer while the F:26 code is active. The pressure sensor controls how the machine monitors water levels, and operating without an accurate reading could lead to overfilling, underfilling, or improper cycle completion. Continuing to run the machine in this state may also cause water-related damage over time.