Bosch Dishwasher Error Code E:03

E:03 means the on-board PTC temperature sensor has detected overheating at the power module or the power cord connection. This is a safety fault designed to prevent further electrical damage or hazard. The dishwasher will stop operating until the fault is resolved. Both the power module and power cord should be inspected and replaced to clear this error.

Yes, E:03 is a safety-relevant fault. An overheating power module or cord connection poses a risk of electrical damage and in severe cases a potential fire hazard. The dishwasher's protection system triggers this code specifically to prevent those outcomes. Do not continue running the appliance while this error is active.

Repair costs for an E:03 fault vary depending on parts pricing and local labor rates. Power module replacement parts typically range from around $80 to $200 or more depending on the specific model, and a service call with labor can add $100 to $200 on top of that. Getting a quote from a certified technician before proceeding is recommended to weigh repair cost against appliance age and condition.

Resolving E:03 requires replacing the power module and power cord, which involves working directly with the dishwasher's main electrical components. While a knowledgeable DIYer may be able to perform this repair, it is a safety-critical fault involving high-voltage components. If you are not experienced with appliance electrical systems, a qualified technician should handle this repair.

Resetting the dishwasher will not permanently clear E:03 if the underlying cause, an overheating power module or cord connection, has not been corrected. The PTC sensor will detect the abnormal temperature condition again and re-trigger the fault. A reset may temporarily clear the display, but the error will return until the power module and cord are replaced.