Frigidaire Dishwasher Error Code ER/uo

The ER/uo code means the dishwasher's control board has detected that the vent will not close. The vent is a small motorized door that opens during the drying cycle to release steam and should close again afterward. When the system cannot confirm the vent has closed, it triggers this code to indicate a fault in the vent assembly, its wiring, or the control board.

Running the dishwasher with the ER/uo code active is not recommended. With the vent stuck open, excess moisture and steam can escape in unintended directions, potentially affecting the door seals and surrounding cabinetry over time. The dishwasher's drying performance will also be significantly reduced until the fault is resolved.

A power reset may temporarily clear the ER/uo code from the display, but if the underlying problem with the vent assembly or its wiring has not been fixed, the code will return once the dishwasher runs through another cycle and the control board checks the vent position again. A reset is useful for confirming whether a fault is intermittent, but it is not a permanent fix.

Some causes of the ER/uo code are DIY-friendly, such as clearing debris or buildup from the vent flap and checking that all wiring connections are secure. If the vent actuator motor or vent door assembly is physically damaged, those parts will need to be replaced, which requires some comfort with disassembling the dishwasher door panel. Control board replacement is more complex and is typically best handled by a technician.

Repair costs vary depending on the failed component. A vent actuator motor or vent assembly replacement typically costs between $50 and $150 in parts, plus labor if a technician is hired. A control board replacement is more expensive, often ranging from $150 to $350 or more for parts alone. Getting a diagnosis before ordering parts will help avoid unnecessary expenses.