Dishwasher displays HO and cycle time is extended; unit is waiting for water to heat.

Safety First: Use caution with hot water; avoid scalding.

• Check hot water supply: Run the hot water at the kitchen sink until it is fully hot before starting the dishwasher. This reduces the time needed to heat water.
• Verify shutoff valve: Ensure the hot water shutoff valve feeding the dishwasher is fully open.
• Measure water temperature: Use a thermometer at the sink to confirm water is at least 120°F (49°C). If not, adjust the water heater.
• Inspect heating element: If HO appears frequently even with hot supply, test the heating element and high-limit thermostat for proper operation and replace if weak or open.
• When to call a technician: If the heater and thermostat test good but HO persists, the temperature sensor or control board may be misreading and should be checked professionally.