Frigidaire Dishwasher Error TU

⚡ Quick Answer: The Frigidaire dishwasher TU error code indicates a turbidity sensor malfunction, often resulting in the dishwasher failing to drain properly and disp... ✅ DIY Fixable

What Does Error TU Mean?

The Frigidaire dishwasher TU error code indicates a turbidity sensor malfunction, often resulting in the dishwasher failing to drain properly and displaying unusual noises. This error may prevent the cycle from progressing due to a soil sensor fault. Common causes include a dirty or obstructed turbidity sensor lens, a faulty turbidity sensor, or wiring issues between the sensor and the control board. Regular maintenance, such as cleaning the sensor, can help prevent this error.

Common Symptoms:

  • Dishwasher displays TU on control panel or during diagnostics
  • Dishwasher may not progress through cycle due to soil sensor fault

Possible Causes

  • Dirty or obstructed turbidity sensor lens (medium)
  • Faulty turbidity sensor (medium)
  • Wiring/connectivity issue between turbidity sensor and control board (medium)

How to Fix Error TU

DIY Fix Inspect and clean turbidity sensor

  1. Disconnect power to dishwasher
  2. Open dishwasher and remove lower rack and filter assembly
  3. Locate turbidity sensor (usually near sump/tub bottom)
  4. Wipe sensor lens gently to remove film and debris
  5. Reassemble and power dishwasher
  6. Run a short cycle to see if TU clears

Technician Only Test sensor and wiring, replace parts as needed

  1. Verify continuity of wiring between turbidity sensor and control board with multimeter
  2. Inspect connectors for corrosion or damage
  3. If wiring is good, test turbidity sensor operation per service manual specifications
  4. Replace turbidity sensor if defective
  5. Verify control board input if error persists

Parts needed: turbidity sensor, wiring harness/connectors

🛑 When to Call a Pro:
  • If testing wiring or sensor replacement reveals further electrical issues
  • If error persists after cleaning and basic troubleshooting

Technical Specifications

wattage 40W
component Drain Pump
resistance 10-20 ohms
part_number 154567101
voltage_rating 120V AC

Common Questions

What does TU error mean on Frigidaire dishwasher?

TU error indicates a turbidity sensor malfunction affecting drainage and operation.

Can I fix Frigidaire dishwasher TU error myself?

Yes, you can clean the turbidity sensor by following DIY steps.

How much does it cost to fix TU error?

Repair costs range from $50 to $200 for parts, excluding technician labor.

When should I call a technician for TU?

Call a technician if issues persist after basic troubleshooting or if further electrical problems are suspected.

Data last verified: 2026-02-19

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