Bosch Dishwasher Error Code E:6103

E:6103 means the dishwasher has detected a drain system fault, either the non-return valve is allowing water to flow back into the machine, or the unit cannot drain water out at all. A missing or loose drain pump cover can also trigger this code by preventing the pump from working effectively. The dishwasher ends the current program when this fault is detected.

A reset may clear the fault code temporarily, but if the underlying drain issue is not corrected, the code will return during the next cycle. You should diagnose and fix the root cause, such as a blocked non-return valve, a loose pump cover, or a kinked drain hose, before relying on a reset to restore normal operation.

Repair costs vary depending on the cause. If the issue is a kinked hose or a loose pump cover, there may be no parts cost at all, with only a service call fee ranging from roughly $75 to $150. Replacing a non-return valve is generally a lower-cost repair, while a full drain pump replacement can bring total costs into the $150 to $350 range depending on labor rates and parts pricing in your area.

Start by checking the drain pump cover to confirm it is securely attached and undamaged. Next, inspect the drain hose for kinks, blockages, or improper routing height. Then check the non-return valve for debris or damage and clean or replace it if needed. If these steps do not resolve the issue, the drain pump itself may need to be tested and replaced.

It is not recommended to continue running the dishwasher while this code is active. A drainage failure means water may be pooling inside the unit or flowing back in, which can lead to water leaks, potential water damage to surrounding cabinetry, and additional strain on the drain pump. Resolve the fault before running another cycle.