Bosch Dishwasher Error Code E:3300

E:3300 means the dishwasher detected that water was entering the tub at a rate higher than permitted. As a safety response, the control board stops the active wash program and runs a drain cycle. The most likely cause is a failed flow regulator inside the water filling valve. Resolving the fault requires inspecting and typically replacing that regulator or the entire inlet valve assembly.

You should not continue using the dishwasher while E:3300 is active. The error indicates an uncontrolled water intake condition, which carries a risk of overfilling and potential water damage to your kitchen floor and cabinetry. The machine will drain and stop as a precaution, but running repeated cycles without diagnosing the cause can stress other components. Address the fault before resuming normal use.

Repair costs depend on the specific component that needs replacement and whether you hire a technician. A replacement flow regulator insert is generally inexpensive, typically in the range of a few dollars to around $15 to $30 if purchased separately. A complete water inlet valve assembly can range from $30 to $80 or more for parts. Adding professional labor, total repair costs commonly fall between $100 and $250 depending on your location and service provider.

Start by locating the water inlet valve, usually behind the lower access panel, and inspecting the flow regulator insert inside it. If the regulator is damaged or missing, replace it or the complete inlet valve. Also check your household water supply pressure, as excessively high pressure can trigger this code even with an intact regulator. If the valve and regulator check out, inspect the wiring harness connected to the solenoid for shorts or loose terminals.

A reset may clear the error code temporarily, but it will not resolve the underlying problem. If the flow regulator or inlet valve is faulty, the excessive flow condition will recur as soon as the appliance attempts to fill again, and E:3300 will reappear. A reset is only useful to confirm whether the fault is intermittent or persistent after a repair has been made.