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
- Ensure the dishwasher is plugged into a properly grounded outlet.
- Check other appliances on the same circuit to see if they also exhibit power issues.
- 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
- Use a multimeter to measure voltage at the dishwasher’s junction box while the unit attempts to start.
- Verify that supply voltage is within the manufacturer’s specified range.
- Inspect household electrical panel, circuit breakers, and wiring for loose connections or voltage drops.
- If needed, upgrade dedicated circuit or correct wiring faults.
Parts needed: Multimeter (for measurement), Potentially electrical panel components, wiring, outlet
- 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.
Next step
Choose the next step for E27
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
Drain Pump
Pumps waste water out of the appliance during the drain cycle.
- Typical part-only price
- $35 - $80
- DIY difficulty
- Easy
- Estimated time
- 15-30 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.
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 | 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
- Thermador Dishwasher Error Codes (official support page) (official)
- Thermador Dishwasher Error Codes Guide (community)
Data last verified: 2026-07-25
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