Dacor Range, Oven, Cooktop Error Code HO

The HO code on Dacor appliances is specifically associated with the Millennia Dishwasher and indicates a water heating delay condition. It means the dishwasher's control system has detected that water is not reaching the required temperature within the expected timeframe during a wash cycle. Common causes include a failing heating element, a faulty thermistor, or low incoming water temperature.

The HO code is not typically a safety emergency, but it does indicate the dishwasher is not operating correctly and may not be sanitizing dishes effectively due to insufficient water temperature. You should avoid running the appliance repeatedly through full cycles until the underlying cause is identified and corrected.

Resetting the dishwasher by cutting power at the breaker for several minutes may temporarily clear the HO code, but the code will return if the underlying issue is not resolved. A reset is useful for ruling out a one-time control glitch, but persistent HO errors require actual diagnosis and repair of the heating element, thermistor, or related components.

Some causes of the HO code are DIY-friendly, such as running hot water before starting a cycle to raise the incoming water temperature or checking that the dishwasher is filling properly. Testing and replacing the heating element or thermistor requires basic electrical testing skills and a multimeter. Control board replacement is more complex and may warrant professional service.

Repair costs vary depending on the faulty component. A replacement heating element typically costs between $30 and $80 for the part, while a thermistor may run $15 to $50. Control board replacement is the most expensive option, often ranging from $150 to $350 or more for the part alone, with additional labor costs if a technician is needed.