Frigidaire Dishwasher UO Error Code — Door Latch Fault | DecodeAppliance

What's Happening

The UO code (sometimes displayed as "UO" or similar on Frigidaire models) means the control board is not detecting the door as properly closed and latched, even when it is physically shut. This is caused by a failed door latch assembly, a worn strike plate that the latch no longer engages, a damaged door switch that doesn't activate when the door is closed, or debris in the latch mechanism preventing full engagement. A dishwasher with UO will not start a cycle as a safety measure.

How to Fix It

Inspect the door latch mechanism for visible damage or debris. Try pressing the door firmly closed and listening for a positive click — if the latch does not click, it may be misaligned or the strike plate needs adjustment. Test the door switch for continuity with a multimeter while activating it manually. A door switch that reads open even when pressed needs replacement. If the latch physically fails to engage, the full door latch assembly needs replacement.

Frequently Asked Questions

What does UO mean on a Frigidaire dishwasher?

UO means the dishwasher's control board doesn't detect the door as properly closed. The door switch or latch mechanism has failed, and the dishwasher won't start as a safety measure.

How do I fix the UO code on my Frigidaire dishwasher?

First check that nothing is preventing the door from closing fully — a misloaded rack or tall utensil can prevent the latch from engaging. If the door closes but UO persists, test the door switch for continuity and replace the switch or latch assembly if failed.

Can I use my Frigidaire dishwasher with a UO code?

No — the dishwasher will not start any cycle while UO is active, since it believes the door is open. This is a safety interlock. You must repair the latch or switch to resume operation.

UOFrigidaire Dishwasher — Frigidaire Dishwasher UO Error Code

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