Dacor Range, Oven, Cooktop Error Code L4

The L4 code on a Dacor Third Generation Dishwasher indicates a water intake fault. The dishwasher's control system monitors water flow using a pulse sensor and requires at least 80 pulses within 60 seconds, or the correct total pulse count within 255 seconds. If either condition is not met, the program stops and L4 is displayed. Despite appearing on range, oven, and cooktop product listings, this code is specific to Dacor's third generation dishwasher platform.

No, the dishwasher stops its program automatically when L4 triggers, so it will not operate until the fault is cleared. Attempting to bypass or ignore the code is not recommended, as running a dishwasher with inadequate water intake can damage the pump and heating element. Address the water supply issue before resuming use.

Repair costs depend on the root cause. If the fix is simply opening a valve or clearing a screen, there may be no parts cost at all, though a service call fee typically ranges from $75 to $150. Replacing a water inlet valve generally costs between $80 and $200 in parts, while a flow meter sensor replacement can range from $50 to $180, with labor added on top if a technician is performing the repair.

Some causes of L4 are DIY-friendly, such as fully opening a partially closed supply valve, clearing a clogged inlet screen, or straightening a kinked water supply hose. These steps require no special tools and no replacement parts. If the inlet valve solenoid or flow meter sensor has failed, those repairs involve electrical components and water connections, and may be better suited for a qualified appliance technician.

A reset may clear the L4 code temporarily, but it will return at the next fill cycle if the underlying water intake problem has not been resolved. The control board will re-evaluate pulse counts every time a new cycle begins. A permanent fix requires correcting the water supply restriction or replacing the faulty component causing the low pulse count.