Bosch Dishwasher Error Code #E

Error code E on Bosch Apexx-display dishwashers signals a water switch fault where the control board detected no pulses from the water switch during a fill cycle. The water switch is a flow-sensing component that generates electrical pulses as water moves through it. When the board counts zero pulses, it cannot confirm water is entering the tub and stops the cycle.

No, you should not run the dishwasher with this error active. Because the control board cannot confirm water is entering the machine, running a cycle risks operating the wash pump without adequate water, which can overheat and damage the pump motor. The dishwasher will typically halt the cycle automatically when this code appears, and the underlying fault needs to be resolved before resuming normal use.

It is a fault that prevents the dishwasher from completing cycles safely, so it requires attention before the appliance can be used normally. The most common causes, a failed water switch or a wiring issue, are repairable without replacing major components and are not considered catastrophic failures. Diagnosing the root cause early also prevents secondary damage, such as a burned-out wash pump from running dry.

Start by checking the wiring connector at the water switch for corrosion, looseness, or visible breaks. If the connector is secure, inspect the water switch turbine for mineral buildup or debris that could be jamming it; cleaning the turbine sometimes resolves the fault. If the wiring and turbine are clear, the water switch itself likely needs replacement. Replacing the switch is a moderate DIY repair requiring disconnection of the water inlet line, but if the fault persists after a new switch is installed, the control board's signal input circuit may have failed and professional diagnosis is advisable.

If the fix is a clogged or seized water switch turbine that can be cleaned, there is no parts cost and only your time. A replacement water switch part typically costs between $20 and $60 depending on the model. If a technician is needed, expect a service call fee of $75 to $150 plus parts and labor, bringing the total to roughly $150 to $250 for a water switch replacement. A control board replacement, if that is the root cause, is significantly more expensive, often $200 to $400 in parts alone.