Bosch Washer Error Code F:31

F:31 means the washer has detected that the water level inside the drum has exceeded the maximum overflow threshold. The machine shuts down to prevent flooding. The fault points to a stuck inlet solenoid valve, an incorrectly adjusted or faulty pressure sensor, a blocked pressure sensor hose, a failed drain pump, or a wiring issue connecting these components.

No. The F:31 code indicates a potential overflow condition, meaning excess water may already be present or could continue entering the drum uncontrolled. Running the machine in this state risks water damage to your home, damage to the washer motor and electronics, and possible electrical hazards. Do not operate the washer until the fault has been diagnosed and resolved.

Repair costs vary depending on the faulty component. Clearing a blocked pressure sensor hose or reseating a loose wire connection costs little beyond your time. Replacing a solenoid valve or pressure sensor typically runs between $80 and $200 in parts and labor depending on your area and service provider. A drain pump replacement can range from $120 to $300 or more when professional installation is included.

Some causes of F:31 are DIY-accessible. You can inspect the pressure sensor hose for kinks or blockages, check that the drain hose is properly routed without restrictions, and look for any loose wire connections. However, replacing a solenoid valve, pressure sensor, or drain pump typically requires disassembling the washer cabinet and working with plumbing and electrical components, which is better suited for technicians or experienced DIYers comfortable with those tasks.

A reset may temporarily clear the error code from the display, but it will not fix the underlying problem. If the root cause, such as a stuck valve or blocked sensor hose, is still present, the machine will detect the overflow condition again and the F:31 fault will return. The fault must be resolved at the component level before the washer will operate reliably.