Samsung Dishwasher Error Code 4C5

The 4C5 code means the dishwasher detected water supply pulses from the flow sensor during a mode when no water should be entering the machine. The control board responds by cycling the inlet valve on for 30 seconds and off for 3 seconds, three times, before halting the cycle. This fault typically points to a stuck inlet valve, a faulty flow sensor, or a wiring issue in that circuit.

It is not advisable to continue running the dishwasher while the 4C5 code is active. The fault indicates uncontrolled water flow, which could lead to overfilling or water damage to the unit or surrounding cabinetry. The dishwasher halts the cycle for this reason, and the underlying cause should be resolved before resuming normal use.

A reset may temporarily clear the 4C5 code and allow a new cycle to start, but the error will return if the underlying problem is not fixed. If the inlet valve is stuck open or the flow sensor is defective, the fault condition will be detected again as soon as the dishwasher goes through a non-water supply mode. A reset is useful for confirming whether the error is intermittent, but it is not a repair.

Some causes of the 4C5 error are DIY-friendly. You can check the water supply pressure, inspect wiring and connectors at the inlet valve and flow sensor, and confirm whether water is visibly leaking into the tub during a non-fill phase. Replacing the inlet valve or flow sensor is within reach for experienced DIYers, but if the control board is suspected, professional diagnosis is recommended.

Repair costs vary depending on the faulty component. Replacing a water inlet valve typically runs in the range of $80 to $200 including parts and labor. A flow sensor replacement is generally similar in cost. If the main control board is at fault, costs can range from $150 to $350 or more. A service diagnostic visit alone often costs $50 to $100 before any parts are factored in.