Bosch Dishwasher Error Code E:05

E:05 means the water switch is running continuously, which indicates a problem with the heat pump. The dishwasher detects that the heating system is not functioning correctly and flashes the Sanitized LED as an alert. The machine will still drain and complete the wash cycle, but water will not be properly heated for sanitization. The heat pump assembly needs to be replaced to resolve the fault.

The dishwasher will continue to run and drain with E:05 active, so it is not immediately dangerous to operate. However, because the heat pump is faulty, your dishes will not be sanitized during the cycle. If sanitization is important for health or hygiene reasons, you should stop using the dishwasher and arrange for repair before running additional loads.

A reset may temporarily clear the E:05 code from the display, but the error will return once the dishwasher runs another cycle and the control board detects the faulty heat pump again. The underlying hardware fault must be corrected by replacing the heat pump assembly. Resetting alone is not a valid repair for this error code.

Replacing the heat pump on a Bosch dishwasher is a moderately complex repair that requires disconnecting power, accessing the bottom of the unit, and removing internal components. Technicians with appliance repair experience can perform this repair, but less experienced DIYers should consider professional service. The heat pump is not internally serviceable, so the entire assembly must be swapped out.

The cost to repair an E:05 error depends on whether you do it yourself or hire a technician. Heat pump assemblies for Bosch dishwashers typically range from $100 to $250 for the part alone. Professional repair, including labor, can bring the total to $200 to $450 or more depending on your location and service provider.