ApplianceErrors.com

Frigidaire Dishwasher Error Code uo

Reviewed by the ApplianceErrors Editorial Team · Verified against manufacturer service documentation · Last verified: June 11, 2026
✓ Low Severity 🔧🔧 Moderate DIY

Vent open error — drying vent failed to close

The most common cause of the uo error on a Frigidaire dishwasher is vent/wax motor assembly failure (~55% of cases); start with: power-cycle.

💰 DIY cost: $0–$60 👨‍🔧 Pro cost: $120–$240 Save $120+ by doing it yourself
Frigidaire Dishwasher error code uo on the display panel
How the uo code appears on a Frigidaire dishwasher display

What Does Error Code uo Mean on a Frigidaire Dishwasher?

Vent open error — drying vent failed to close.

Frigidaire dishwashers dry with a motorized vent that opens to release moist air. The 'uo' code means the control sees the vent stuck open when it should be closed — wash performance continues but drying and heat retention suffer, and the cycle flags the fault. A failed vent assembly or wax motor is the usual cause.

What Causes Error Code uo?

Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:

  1. 1
    Vent/wax motor assembly failure 55% of cases
  2. 2
    Debris or grease jamming the vent flap 30% of cases
  3. 3
    Wiring fault to the vent assembly 15% of cases

How to Fix Frigidaire Dishwasher Error Code uo

🔧🔧 Moderate DIY Est. time: 30–60 min
⚡ Safety first: Unplug the appliance before opening any panels or touching internal components.
  1. 1

    Power-cycle

    Switch the breaker off for 60 seconds — if the vent was momentarily stuck, the reset clears it.

  2. 2

    Inspect the vent

    Find the vent on the inner door (top corner on most models), and check the flap for grease or detergent buildup keeping it open.

  3. 3

    Replace the vent assembly

    The vent and its wax-motor actuator replace as a unit from the inner door panel.

    🔩 Frigidaire vent assembly ($25–$60)
    ⚠️ Switch off the breaker before removing the inner door screws.

How to Reset Error Code uo

Switch the breaker off for 60 seconds and run a short cycle. The code clears once the control sees the vent close properly.

Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.

Full Frigidaire dishwasher reset guide → Enter diagnostic mode →

Did this guide fix your appliance?

When to Call a Professional

The dishwasher remains usable with 'uo' showing, so there's no urgency — but if dishes come out wet and the code persists after a new vent assembly, have the control board checked.

Average professional repair cost for this issue: $120–$240

Related Error Codes

i20
Drain problem — water not draining
⚠ High Severity
i30
Leak detected in base
⚠ High Severity
PF
Power failure — cycle interrupted
✓ Low Severity

Find Replacement Parts

Use these links to find the exact replacement parts for your Frigidaire Dishwasher:

🔩
Search PartSelect
Frigidaire Dishwasher repair parts
🔧
Search RepairClinic
Step-by-step video guides

External links — ApplianceErrors.com is not affiliated with these retailers.

More Frigidaire Dishwasher Error Codes

i10 Water supply problem — insufficient fill i40 Clogged filter or sump — restricted water circulation i50 Wash motor / circulation pump and heater assembly fault i60 Water heating failure — water not reaching target temperature iC0 Communication error — touchpad/control not talking to main board

Frequently Asked Questions

Can I keep using my Frigidaire Dishwasher when error uo appears? +
Usually yes — uo is a low-severity sensor notice that rarely stops the dishwasher from working, but clearing the underlying cause prevents it from escalating.
What most commonly causes uo on a Frigidaire Dishwasher? +
Across reported Frigidaire dishwasher repairs, the most frequent is vent/wax motor assembly failure (55% of cases), debris or grease jamming the vent flap (30%), then wiring fault to the vent assembly (15%). Check them in that order before replacing any parts.
uo keeps coming back after a reset — what should I check next? +
A reset only clears the stored uo fault; if it returns, the sensor problem is still present. Move on to the physical checks — power-cycle, then inspect the vent — since the code will reappear until the root cause is resolved. This is a moderate job — a multimeter and some disassembly are usually involved.
How much does it cost to fix Frigidaire Dishwasher error uo? +
A DIY repair typically runs $0–$60 in parts, versus $120–$240 for a professional service call, so handling it yourself saves around $120. Expect the work to take roughly 30–60 minutes.

Sources & References

Content verified against manufacturer service documentation. Last verified: June 11, 2026.

← All Frigidaire Dishwasher Error Codes ← All Frigidaire Error Codes