Bosch Dishwasher Has Stuck Drain

Written by misty faucheux
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Bosch, a German technology company, specialises in automobile components, but it also sells home appliances. The company offers three types of dishwashers, including visible or concealed controls and custom panel dishwashers. A common problem with Bosch dishwashers is that they don't drain properly. If you are experiencing this issue, troubleshoot and repair the problem to eliminate service fees.


A Bosch dishwasher has a drainage hose, which captures the water draining from the dishwasher. Verify that the hose is correctly installed and that the hose is at least 20 inches higher than the floor. See if the pump is clogged or kinked and clean it if necessary. Straighten the hose if it's kinked. Check the air gap and clean it out if you find debris. The air gap is located near the sink. Your dishwasher has filters on the base of it. Remove any debris blocking the filters and clean your kitchen sink drain if it's dirty. Always be sure the cycle is complete before attempting any repair.


Food particles can also get caught in the pump, which is located beneath the spray arm and bottom rack. Remove these components and use a plastic utensil or toothpick to clean the drain. The pump may hum, but if clogged it may not pump. If it is not clogged, examine the pump and look for broken components. Especially examine the impeller. If any piece of the pump is cracked or defective, you must replace the whole pump.


If your Bosch dishwasher stops mid-cycle, verify that your power is on. If not, wait for the power to come back on and then restart the cycle. You have either household fuses or a circuit breaker. Change out any black or broken fuses or turn the circuit breaker back on if tripped. Your motor may normally pause between cycles. If you haven't used the dishwasher in a while, you may have to manually turn it. Unplug the dishwasher and open up the main housing. Turn the motor until it moves freely. If the motor has an electrical burning smell or is corroded, you must replace it.

Drain Valve

While not as common, you may have an issue with the drain valve. The drain valve is responsible for opening up and moving water to the drain hose. If this valve is not opening and closing properly, water will remain in the tub. See if any dishware or debris is blocking the valve and remove these items. Add lubrication if stuck. If the valve still doesn't turn, replace it.

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