What Bosch E29 error means on your dishwasher
Error code E29 indicates that the dishwasher has detected a mains voltage level below the minimum required for safe operation. Bosch dishwashers monitor incoming voltage and will not operate if it drops below approximately 90V (for 120V models) to prevent erratic behavior, incomplete cycles, and potential component damage. If you encounter the bosch e29 error, professional Bosch dishwasher repair may be needed.
Symptoms
- The dishwasher displays E29 and refuses to start or stops mid-cycle
- Lights on the control panel may appear dim or flicker
- The error may come and go — appearing during peak electricity usage in the home
- Other appliances on the same circuit may also behave erratically
Common causes
- Overloaded circuit — too many appliances sharing the same electrical circuit draw total amperage down, reducing voltage at the dishwasher
- Loose outlet connection — a worn or corroded outlet provides inconsistent voltage
- Damaged power cord — internal wire damage in the cord increases resistance and drops voltage
- Utility voltage sag — the power company’s supply voltage drops during peak demand periods, especially in older neighborhoods or rural areas
- Long extension cord — using an extension cord (not recommended) introduces voltage drop
See all Bosch dishwasher error codes for related fault codes and diagnostic steps.
Troubleshooting steps you can try
- Check the outlet — plug a different appliance into the same outlet to verify it works. If possible, use a voltage tester to measure the outlet — it should read between 110–125V.
- Reduce circuit load — turn off other appliances on the same circuit (garbage disposal, countertop appliances) before running the dishwasher.
- Inspect the power cord — check for visible damage, kinks, or loose plug prongs.
- Try a different time — if E29 appears during evening peak hours, run the dishwasher at night or early morning when utility voltage is typically higher.
- Check Bosch support — visit Bosch’s official dishwasher support page for model-specific troubleshooting guides and tech notes.
When to call a technician
If the outlet voltage tests normal and the cord is in good condition, the dishwasher’s internal power supply board may be failing. An electrician should also inspect the circuit if voltage at the outlet is consistently low — the home’s wiring may need attention. Codes may vary by model generation and series. Schedule a certified Bosch technician for fast, reliable diagnosis and repair.
