Frigidaire Dishwasher ER/UO Error Code: Door Lock Fault

Quick Answer

ER or UO on a Frigidaire dishwasher indicates a door lock fault. ER may be displayed during a lock command and UO during an unlock command, but both point to the door latch assembly 154740101. Before replacing the latch, check that nothing is physically obstructing the door from latching - a warped door, bent hinge, or object between the door and the tub rim can prevent the latch from engaging fully.

When I see ER or UO on a Frigidaire, the control board's waiting for a handshake from the latch that never came through. ER stops a wash before it starts, UO shows up when the unit can't confirm the door's safely unlocked. Honestly, it's usually a cracked plastic latch housing or a warped inner door panel keeping the microswitch from clicking all the way into place.

FrigidaireDishwasherSeverity: moderateDifficulty: intermediate85% DIY Success

Time to Fix

20–50 min

Difficulty

intermediate

Parts Cost

$15 – $28

Tools Needed

Flathead screwdriver, Phillips #2 screwdriver

What Does the ER/UO Code Mean?

These codes mean there's a communication break between the door latch and the main control board. Sounds complicated, but nine times out of ten it's a simple mechanical failure. I always start by checking if the top rack's pushed all the way in, because even a quarter inch of protrusion can keep the latch from seating deep enough to satisfy the sensors. Usually a $30 latch fix, not a $200 control board replacement.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Door latch mechanism worn or broken40%

Physical obstruction preventing full door closure24%

Door misalignment from hinge wear or installation issue14%

Control board latch relay fault12%

Latch solenoid winding failure10%

Symptoms You May Notice

ER or UO flashes on the display and the dishwasher just sits there, won't respond to any button presses at all.
You push the door closed and it feels like it latched, but the machine won't start and there's no water sound, nothing.
That satisfying click when you close the door is gone, or it feels mushy and uncertain instead of crisp and definite.
Cycle stops partway through and the display shows UO while the door feels stuck, like it's locked but won't let you open it.
There's a tiny visible gap along one side of the door seal that wasn't there before, and the door looks slightly crooked when you stand back and look at it straight on.

Can you reset a Frigidaire dishwasher to clear the ER/UO code?

To clear the error memory after a repair, flip the circuit breaker for sixty seconds. This drains the capacitors on the control board. Once power is restored, open the door fully, close it with a firm push to ensure the latch engages, and then select a new cycle to confirm the code has cleared.

Tools Required for Diagnosis

Flathead screwdriverPhillips #2 screwdriverTorx T20 screwdriverDigital multimeterBubble levelFlashlight or headlampElectrical contact cleaner sprayToothpick or dental pick (for debris removal)

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

ComponentComponent Under Test

Expected Range0–5 ohms

ConditionIf Open (OL) or infinite, replace component.

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name	OEM Number	Estimated Price
Door Latch Assembly154740101 · $15–$28	154740101	$15 – $28

Frequently Asked Questions

What's the difference between Frigidaire ER and UO?

ER is a failure-to-lock code that fires when you hit start and the board doesn't see the door confirm locked. UO is a failure-to-unlock code that usually shows up at the end of a cycle when the board tries to release the latch and gets nothing back. Different letters, same hardware. They both point straight at latch assembly 154740101. The board's just telling you where in the cycle it lost contact with the latch, but the fix is almost always the same part.

Can I bypass the Frigidaire door lock to run a cycle?

Don't. These boards look for specific resistance and timing during the latching sequence, and if you try to jump the wires you risk blowing a trace on the main control board, which is a $150+ part on its own. More importantly it's a real safety hazard. If the latch is bypassed and the door pops open mid-cycle you're looking at a flooded kitchen and serious burns from the steam. The latch is there for a reason. Just replace the $30 part.

How much does it cost to fix ER or UO on a Frigidaire dishwasher?

If it's the latch assembly, you're looking at about $25-35 for part number 154740101 and maybe 45 minutes of your time. If it's a wiring harness issue, add another hour of labor if you're paying someone. Control board replacement is where it gets painful, usually $150-250 for the part alone, and at that point you should seriously weigh it against a new unit, especially if the dishwasher's more than 8 years old. Most of these repairs land on the cheap end though.

My Frigidaire door feels like it closes but I still get the ER code. What am I missing?

This happens constantly. The door can feel closed to you but the latch hook might only be engaging partway, which isn't enough for the microswitch to fire. First thing I'd check is whether the top rack is fully pushed in, because the rack can bump the inner door panel and prevent full closure by like an eighth of an inch. Also check the door gasket. If it's bunched up or folded over on one corner, it creates enough resistance that the latch can't pull all the way in. And double-check that the dishwasher's level side to side.

How long does a Frigidaire door latch assembly usually last?

Honestly, 7-12 years if you're not slamming the door. The plastic degrades from heat and moisture over time and eventually the hook cracks or the spring weakens. I've replaced them as early as 4 years on units where someone was closing the door hard every single day, and I've seen them last 15 years on gentle-use machines. The $30 replacement is one of the better deals in appliance repair. Way better than replacing the whole dishwasher over a latch.

Will the ER or UO code clear on its own after I fix the latch?

No. Once that code's stored it's not going anywhere until you reset the board. Fix the latch first, then flip the breaker for 60 seconds to drain the capacitors and clear the error memory. Once power's back on, close the door with a firm push, listen for the click, then select a new cycle and see if it starts. If it starts and runs without throwing the code again, you're done. If it comes back immediately, something else is still wrong.

Related Frigidaire Dishwasher Error Codes

Code: I30Frigidaire Dishwasher I30 Error Code: Leak Detected Code: PFFrigidaire Dishwasher PF Error Code: Power Failure Code: E30Frigidaire Dishwasher E30 Error Code: Dispenser Fault

Same Fix Works on These Brands

Frigidaire shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

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Models Known to Experience ER/UO Errors

This repair applies to most Frigidaire dishwashers with this error code. Common model numbers include:

FFCD2413US, FFCD2418US, FGID2479SF, FGID2466QB, FFID2426TS, FGID2474QF, FFBD2406NS, FGID2479QF

Written by

Mike Sullivan

Lead Appliance Repair Technician · 20 years experience

Last verified for technical accuracy on March 14, 2026