Thermador Dishwasher Error E27

⚡ Quick Answer: The Thermador dishwasher E27 error code indicates a low supply voltage issue, preventing the appliance from functioning properly. This error may resul... ✅ DIY Fixable

What Does Error E27 Mean?

The Thermador dishwasher E27 error code indicates a low supply voltage issue, preventing the appliance from functioning properly. This error may result in the dishwasher stopping prematurely or failing to start altogether. You may also hear unusual noises as it struggles to drain water. It's crucial to check your household's electrical supply to ensure it meets the necessary voltage requirements for optimal operation.

Common Symptoms:

  • Dishwasher stops operation early or won’t start
  • Error E27 displayed on control panel
  • Appliance may reset or fail to complete cycle due to power issues

Possible Causes

  • Insufficient incoming electrical voltage (high)

How to Fix Error E27

DIY Fix Check household power supply and connections

  1. Ensure the dishwasher is plugged into a properly grounded outlet.
  2. Check other appliances on the same circuit to see if they also exhibit power issues.
  3. Confirm that large load devices (e.g., ovens, heaters) are not operating simultaneously causing voltage drop.

Technician Only Measure and correct supply voltage / Inspect electrical system

  1. Use a multimeter to measure voltage at the dishwasher’s junction box while the unit attempts to start.
  2. Verify that supply voltage is within the manufacturer’s specified range.
  3. Inspect household electrical panel, circuit breakers, and wiring for loose connections or voltage drops.
  4. If needed, upgrade dedicated circuit or correct wiring faults.

Parts needed: Multimeter (for measurement), Potentially electrical panel components, wiring, outlet

🛑 When to Call a Pro:
  • If voltage measurements show supply remains below acceptable range even with no major household loads.
  • If intermittent power delivery or electrical faults are observed.
  • If the error persists after checking wiring and supply voltage.

Technical Specifications

wattage 60W
component Drain Pump
resistance 10-30 ohms
part_number 00705463
voltage_rating 120V AC

Common Questions

What does E27 error mean on Thermador dishwasher?

E27 error indicates low supply voltage, causing the dishwasher to stop or fail to start.

Can I fix Thermador dishwasher E27 error myself?

Yes, check the power supply and ensure it's properly grounded. Verify if other appliances on the same circuit are affected.

How much does it cost to fix E27 error?

Repair costs range from ¥10,000 to ¥30,000+, depending on the electrical correction needed.

When should I call a technician for E27?

Call a technician if voltage remains low despite checking wiring or if you notice ongoing power issues.

Sources & References

Data last verified: 2026-03-25

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