Frigidaire Dishwasher Error UO

⚡ Quick Answer: The Frigidaire dishwasher error UO indicates a drainage issue, specifically a communication error related to the vent assembly. This error can cause t... ✅ DIY Fixable

What Does Error UO Mean?

The Frigidaire dishwasher error UO indicates a drainage issue, specifically a communication error related to the vent assembly. This error can cause the dishwasher to pause or fail to start the wash cycle, and you may hear unusual clicking sounds. The vent may be stuck open, disrupting its operation. Key components that could be faulty include the vent assembly, wiring connections, or the optical sensor.

Common Symptoms:

  • Dishwasher displays UO and may pause or fail to start wash cycle
  • Vent may be stuck open disrupting drying or cycle operation
  • Possible clicking sounds and water draining when code appears

Possible Causes

  • Faulty or stuck vent assembly (vent door, vent motor or plunger) (medium)
  • Wiring issues between vent assembly and main control board (medium)
  • Faulty optical sensor or vent position signal (medium)

How to Fix Error UO

DIY Fix Basic checks and reset

  1. Turn off power to dishwasher at breaker or unplug.
  2. Wait 5–10 minutes.
  3. Restore power and run a cycle to see if UO clears.

Technician Only Inspect and service vent assembly and wiring

  1. Disconnect power and pull dishwasher out for access.
  2. Inspect vent assembly (motor, vent door, plunger) for damage or blockage.
  3. Test continuity and condition of wiring between vent assembly and control board.
  4. Replace vent assembly, wiring harness, or optical sensor as needed.
  5. Reassemble and test dishwasher operation.

Parts needed: Vent assembly (motor, vent door/plunger), Wiring harness, Optical sensor

🛑 When to Call a Pro:
  • If error persists after basic user troubleshooting
  • If wiring or internal components show signs of damage
  • If uncertain about safely accessing internal parts

Next step

Choose the next step for UO

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Based on diagnostic data

Most relevant component to inspect

Wiring Harness

Connects controls, sensors, motors, and other electrical components inside the appliance.

Typical part-only price
$20 - $120
DIY difficulty
Medium
Estimated time
30-90 mins
Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

Other parts options

Check related components first; use model search as a fallback.

Model number required

Model-compatible Dishwasher parts

Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.

Find a part that fits my model

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Optional routine care

Maintenance supplies

These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.

Maintenance supply

Dishwasher Cleaner and Descaler

Supports routine removal of mineral scale, grease, and odor. It is maintenance, not a repair for a failed pump, valve, or control.

View maintenance supply
Maintenance supply

Braided Dishwasher Inlet Hose

For replacement of an externally damaged supply hose. Verify connection size, length, and appliance installation requirements before ordering.

View maintenance supply

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.

Technical Specifications

wattage 60W
component Drain Pump
resistance 10-15 ohms
part_number 154567401
voltage_rating 120V AC

Common Questions

What does UO error mean on Frigidaire dishwasher?

UO error indicates a drainage issue, often due to a stuck vent assembly or wiring problems.

Can I fix Frigidaire dishwasher UO error myself?

Yes, you can try resetting the dishwasher by turning off the power for 5-10 minutes.

How much does it cost to fix UO error?

$50–$200 for parts depending on whether you need to replace the vent assembly or wiring.

When should I call a technician for UO?

Call a technician if the error persists after troubleshooting or if you notice damaged wiring.

Data last verified: 2026-07-25

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