GE Dishwasher Error Code C4

The C4 code means the control board has detected a flood or overfill condition inside the dishwasher tub. In response, the control de-energizes the water inlet valve, starts the circulate pump, and beeps at 1-second intervals. The dishwasher will run the pump for up to 1 minute after the overfill condition clears before allowing normal operation to resume.

You should not run the dishwasher while the C4 code is active. The code indicates a potential water overflow situation, and continuing to operate the appliance without diagnosing the cause could result in water damage to your kitchen floor or cabinets. Allow the control to complete its pump-out cycle, then inspect the float switch and inlet valve before attempting another wash cycle.

Start by pressing RESET to clear the display, then open the dishwasher door and locate the float assembly at the bottom of the tub. Check that the float switch cover is seated properly and that the float moves up and down freely without obstruction. If the float assembly looks intact, consider whether a recent power failure may have caused a double fill, and then move on to inspecting the water inlet valve for signs of being stuck open.

Pressing RESET will clear the C4 code from the display, but it will not fix the underlying cause if one exists. If the error was triggered by a power failure causing a double fill, a reset may be all that is needed. However, if the float switch cover is dislodged, the inlet valve is faulty, or the float switch has failed, those issues must be addressed or the code will return.

Repair costs depend on the root cause. If only the float switch cover needs to be reseated, there is no parts cost and the fix takes only a few minutes. Replacing a faulty float switch typically costs between $15 and $50 for the part, while a new water inlet valve generally ranges from $25 to $80 depending on the model. Adding a technician service call will increase the total cost to roughly $100 to $250 in most cases.