Bosch Dishwasher Error Code E:0105

E:0105 signals a ground fault at the Zeolite heater or a defective relay in the power module that controls the Zeolite heater. The Zeolite system is Bosch's advanced drying technology that uses a moisture-absorbing mineral to generate heat during the drying cycle. When this fault is detected, the dishwasher disables the Zeolite drying function and continues operating in a reduced capacity. Dishes will still be washed normally but may come out wet at the end of the cycle.

The dishwasher is designed to continue operating with the Zeolite drying system disabled when E:0105 is active, so normal wash cycles can typically continue. However, a confirmed ground fault in a heating circuit is an electrical issue that should be addressed promptly and not left unrepaired indefinitely. If you notice any unusual smells, tripped breakers, or other signs of electrical trouble, stop using the appliance and have it inspected immediately.

Repair costs depend on which component has failed. Replacing the Zeolite heater assembly typically runs in the range of $150 to $350 including parts and labor. If the power module requires replacement, costs are generally higher and can range from $250 to $500 or more depending on the specific model and labor rates in your area. Getting a diagnostic assessment from a qualified technician before authorizing parts replacement is recommended to confirm which component is at fault.

Diagnosing and replacing the Zeolite heater or power module requires disassembling internal dishwasher components and working with mains voltage wiring, so this repair is best handled by a qualified technician. A knowledgeable DIYer with electrical testing experience can inspect the wiring harness and connectors for obvious damage, but confirming a heater or relay failure requires continuity and insulation resistance testing with appropriate tools. Replacing the power module in particular involves handling components connected directly to line voltage.

Resetting the dishwasher may temporarily clear the error code from the display, but the fault will return as soon as the control system runs diagnostics on the Zeolite heater circuit again. Because E:0105 is caused by a hardware fault in the heater or power module relay, the underlying component must be repaired or replaced before the code will clear permanently. A reset alone does not fix the electrical problem.