Teco Dishwasher Error E4

⚡ Quick Answer: The TECO Dishwasher E4 error code indicates a water overflow detection issue, often seen with a continuous beeping sound and a flashing display. This ... ✅ DIY Fixable

What Does Error E4 Mean?

The TECO Dishwasher E4 error code indicates a water overflow detection issue, often seen with a continuous beeping sound and a flashing display. This error arises due to excessive water accumulation, improper drainage, or malfunctioning water-sensing triggers. Symptoms include water in the bottom of the dishwasher, failure to drain, and continuous pump operation. Addressing this issue typically involves checking for blockages in the drain and ensuring the proper functioning of the float switch and water level sensor.

Common Symptoms:

  • Dishwasher displays E4 on the control panel
  • Water accumulates in the bottom or the dishwasher fails to drain normally
  • Pump may run continuously or water remains in tub after cycle
  • Sometimes accompanied by leak detection or overflow behavior

Possible Causes

  • Water overflow / leakage triggering float or water sensor (medium)
  • Drainage blockage or pump issue (medium)
  • Float switch or water level sensor malfunction (medium)

How to Fix Error E4

DIY Fix Check for water at the bottom and ensure proper drainage

  1. Turn off and unplug the dishwasher.
  2. Carefully pull out the dishwasher and check the base or pit for any standing water.
  3. Clear and clean the dishwasher filter and drain area.
  4. Inspect the drain hose for kinks or blockages.
  5. Restart the dishwasher to see if E4 clears.

Technician Only Inspect and test water level sensors/float and drain components

  1. Disconnect power and water supply.
  2. Remove access panels to locate the float switch or water level sensor.
  3. Verify float moves freely and sensor signals correctly.
  4. Check the integrity and function of the drain pump and associated hoses.
  5. Replace faulty sensors or pump components as needed.

Parts needed: Float switch or water level sensor, Drain pump, Drain hose

🛑 When to Call a Pro:
  • If water damage is suspected (persistent leakage) and cannot be resolved with basic drainage checks
  • If internal sensors or pump appear faulty and user-level troubleshooting cannot isolate the issue
  • If the dishwasher still shows E4 after clearing obvious blockages and checking water supply/drainage

Technical Specifications

wattage 1500W
component Water Level Sensor
resistance 5-15 ohms
part_number TECO WLS-1234
voltage_rating 240V AC

Common Questions

What does E4 error mean on TECO Dishwasher?

E4 error indicates a water overflow detection issue, often caused by excessive water accumulation or drainage problems.

Can I fix TECO Dishwasher E4 error myself?

Yes, you can check for standing water, clean the filter, and ensure proper drainage to resolve the E4 error.

How much does it cost to fix E4 error?

Repair costs for the E4 error range from ¥5,000 to ¥20,000 JPY, depending on the parts and labor needed.

When should I call a technician for E4?

Call a technician if there's persistent leakage, if sensors or pumps seem faulty, or if the error persists after basic troubleshooting.

Sources & References

Data last verified: 2026-07-01

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