Bosch Washer Error Code 18

Error 18 means the drain pump ran longer than the allowable time without successfully emptying the drum. The washer stops the cycle to protect itself. Common causes include a blocked pump, a clogged or kinked drain hose, a defective pressure sensor, or a failed pump motor.

Start by resetting the machine, then check the drain pump filter for debris and clear any blockage. Inspect the drain hose for kinks or clogs and verify it is installed at the correct height. If the pump filter and hose are clear, check the pressure sensor hose for blockage and test the pump and wiring harness for electrical faults. Replace any confirmed failed components.

If the fix is simply clearing a clog from the pump filter or drain hose, the repair costs nothing beyond your time. A replacement drain pump typically costs between 40 and 120 dollars for the part, with professional labor adding 80 to 200 dollars depending on your area. A faulty pressure sensor is generally less expensive, usually ranging from 20 to 60 dollars for the part.

Turning the washer off and back on can reset the error and allow the cycle to restart, which is the recommended first step. However, if the underlying cause such as a clog or faulty component is not resolved, the error will return. Always inspect the pump filter, drain hose, and pressure sensor hose before assuming a reset has fixed the problem.

No, you should not continue running the washer until the issue is resolved. The machine stops automatically to prevent pump motor burnout and potential water overflow. Continuing to force cycles could cause additional damage to the pump or control board.