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
- Turn off and unplug the dishwasher.
- Carefully pull out the dishwasher and check the base or pit for any standing water.
- Clear and clean the dishwasher filter and drain area.
- Inspect the drain hose for kinks or blockages.
- Restart the dishwasher to see if E4 clears.
Technician Only Inspect and test water level sensors/float and drain components
- Disconnect power and water supply.
- Remove access panels to locate the float switch or water level sensor.
- Verify float moves freely and sensor signals correctly.
- Check the integrity and function of the drain pump and associated hoses.
- Replace faulty sensors or pump components as needed.
Parts needed: Float switch or water level sensor, Drain pump, Drain hose
- 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
Next step
Choose the next step for E4
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Float Switch
Detects the maximum water level to prevent overflow and potential flooding.
- Typical part-only price
- $15 - $40
- DIY difficulty
- Easy
- Estimated time
- 10-20 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.
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.
Pressure Switch
Detects the water level inside the tub and signals when to start or stop filling.
Drain Pump
Pumps waste water out of the appliance during the drain cycle.
Drain Hose
Carries waste water from the drain pump to your home's standpipe or sink drain.
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.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
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.
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.
Braided Dishwasher Inlet Hose
For replacement of an externally damaged supply hose. Verify connection size, length, and appliance installation requirements before ordering.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
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: 2026-07-26
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