Bertazzoni Heritage Dishwasher Code HI: High voltage failure

What HI means

On current Bertazzoni Heritage, Professional and Master dishwashers such as the DW24T3IXV, DW24T2IXB and DW18S2IPV, HI means a high voltage failure. The control board has detected a supply voltage above what it is built for, and the recommended step is to contact service. The dishwasher stops and shows HI, and it may work again when the home supply returns to normal.

Common causes of HI

Household supply voltage running high
Power surge that stressed the control board
Loose neutral or wiring problem at the outlet or panel
Control board voltage sensing out of range

✓ One safe check you can try

1. Press Cancel and switch the dishwasher off at its breaker. 2. Wait a few minutes, then switch it back on. 3. Notice whether other appliances or lights seem to behave oddly. 4. Try a short cycle. 5. If HI returns, leave the dishwasher off and call us. A licensed electrician should check the home supply.

! Why to stop there

High voltage can damage a control board that is otherwise fine.
The cause may be in the home's wiring rather than the dishwasher.
Opening electrical parts without testing is not something we ask owners to do.
We check the machine, explain the findings and quote in writing first.

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.

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Other Dishwasher codes

F5Bertazzoni Heritage Dishwasher Code F5: Pressure system failure F6Bertazzoni Heritage Dishwasher Code F6: Heater sensor failure F7Bertazzoni Professional Dishwasher Code F7: Overheating F8Bertazzoni Master Dishwasher Code F8: Heater error F9Bertazzoni Heritage Dishwasher Code F9: Divisor position error E1Bertazzoni Legacy 24-Inch Dishwasher Code E1: Water inlet too slow FEBertazzoni Heritage Dishwasher Code FE: Electronic card failure E3Bertazzoni Legacy DW24PR Code E3: 90-Minute heating timeout

HIHI questions

Does HI mean my house wiring is wrong?

Not necessarily, but the dishwasher has seen a voltage higher than it likes. If other appliances act strangely, ask an electrician to check the supply as well.

Can a power surge cause HI?

Yes. A surge or sudden voltage rise can trigger it. If the code clears after a breaker reset and never returns, it may have been a one-time event.

Is it safe to use the dishwasher after HI?

If the code clears and stays away, it is likely fine. If HI repeats, switch it off and call us so we can protect the board from damage.