Dacor Range Oven Cooktop Error Code L5

The L5 error code on Dacor Third Generation dishwashers indicates that water is being detected entering the unit through the inlet valve circuit even when the inlet valve has been commanded to close. This is a water intake fault, specifically a leaking valve condition. The control board monitors flow through the system and when it detects water movement or presence while the inlet valve solenoid is deactivated, it triggers this code to prevent uncontrolled water intake that could lead to flooding or operational damage.

The primary components involved in this fault are the water inlet valve and the flow meter. The inlet valve is an electrically operated solenoid valve that opens and closes to allow water into the dishwasher. The flow meter monitors water movement through the intake line. When the control signals the inlet valve to close, the flow meter should register no water movement. If flow is still detected, it indicates the valve is not fully seating and is allowing water to pass through in its nominally closed state.

The most common root cause is a mechanically failed inlet valve where the internal diaphragm or solenoid plunger no longer creates a complete seal when de-energized. Debris, mineral scale buildup, or a worn valve seat can all prevent full closure. The flow meter itself should also be inspected, as a faulty meter could falsely report flow when none exists. Begin diagnosis by checking for actual water trickling into the tub with the valve deactivated, then inspect the flow meter for blockage or sensor failure.