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

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: 2026-02-19

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