Bosch Dishwasher E:30, voltage too high and the machine shut down

What E:30 means

E:30 is the opposite of the undervoltage record. The machine measured supply voltage over 140 volts in North America and shut itself down to protect its electronics. Bosch again sends you to the house wiring, not the appliance. A reading like that on a nominal 120-volt circuit often points to a neutral problem, which affects everything plugged in nearby. Storm outages and restorations are one time such wiring trouble tends to surface.

Common causes of E:30

Open or poor neutral in the house supply
Outlet miswired at the appliance
Irregular supply upstream of the property

✓ One safe check you can try

1. Stop using the dishwasher. 2. Think about what else has been acting up: lights that swell and fade together, or small electronics dying early. 3. Those are the signs that accompany this code. 4. Call an electrician before running other sensitive appliances.

! Why to stop there

A neutral problem can damage electronics throughout the house, not only the dishwasher.
Overvoltage can burn out the power module in a single cycle.
Probing a live outlet to confirm the reading is dangerous.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Dishwasher codes

E:31Water in the zeolite container - Bosch Dishwasher E:31 FBosch Dishwasher F on an older display (water filling) 2HBosch Dishwasher 2H: Long Cycle Warning on Older Displays 1Bosch Dishwasher Service Test Result 1: Aqua Sensor 2Bosch Dishwasher Service Test Result 2: Heating Group 4Bosch Dishwasher Service Test Result 4: Water Filling 8Bosch Dishwasher Service Test Result 8: Temperature Sensor 16Bosch Dishwasher Service Test Result 16: Spray Diverter

E:30E:30 questions

Is E:30 an emergency?

Treat it as urgent. Overvoltage can harm electronics, so stop using the dishwasher and have an electrician check the supply promptly, particularly if lights or other devices act oddly.

Could the dishwasher have been damaged already?

Possibly, if the voltage was high for long. Once the house supply is corrected, we check the power module and run the machine to see if it behaves normally.

Will you fix the wiring?

No, the supply is an electrician's job. We deal with the dishwasher side afterward, and you get a written price before we do any work.