Daewoo Washer Error Code H2

The H2 error code on a Daewoo washer indicates a thermistor wash fault. The wash thermistor is a temperature-sensing resistor embedded in the washing system that monitors water temperature during the wash cycle. When the washer's control board cannot read a valid signal from this sensor, either because the resistance value falls outside the expected range or because no signal is received at all, it triggers the H2 code and halts normal operation.

The three primary causes outlined for this code are a defective thermistor, a failed thermistor, or an improper electrical connection between the thermistor and the control board. Thermistors change their resistance in response to temperature, and when a unit degrades or becomes an inferior component, its resistance readings become erratic or fall outside the acceptable parameters the control board expects. A completely broken thermistor will send no signal at all, while a loose or corroded connector will produce intermittent or absent readings that the board interprets as a fault.

Diagnosis should begin at the thermistor's wiring connector, as connection issues are among the most straightforward causes to identify and resolve. If the connector is seated properly and shows no visible corrosion or damage, the next step is to test the thermistor itself with a multimeter to check whether its resistance readings correspond correctly to the ambient or water temperature. A thermistor that reads open circuit or shows a fixed resistance regardless of temperature conditions should be replaced.