HI
Amana High Line Voltage Protection

Display shows HI and unit may shut down or limit operation; often during very high line voltage conditions.

Advertisements

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Advertisements

Possible Causes

Overvoltage from utility, incorrect supply voltage (e.g., 230V on 115V unit), loose neutral causing voltage imbalance, defective control board voltage sensing

How to Fix / Troubleshooting

Safety first: High voltage is dangerous. If you are not trained, contact an electrician. Always turn off the breaker before opening panels.

Steps to address HI (high voltage):

  • Verify correct circuit: Confirm the unit is connected to the proper voltage circuit as specified on the nameplate.
  • Measure voltage: Use a multimeter to check line voltage at the receptacle or disconnect. If it exceeds the rated range, contact your utility or an electrician.
  • Inspect neutral and ground: Loose or missing neutrals can cause overvoltage on one leg. Have an electrician correct any wiring issues.
  • Control board: If supply voltage is normal but HI persists, the control board's sensing circuit may be defective and require replacement.

Do not operate the unit until voltage is within the specified range to avoid permanent damage.

Advertisements

Repair Difficulty

Hard 4/5

Required Part

Main Control Board
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements