Daewoo Microwave Error Code Err 2

Err 2 indicates a thermistor circuit fault. The thermistor is a temperature-sensing resistor that should read approximately 200k to 300k ohms at room temperature. When the control board detects a reading of 0 ohms or infinite resistance, it triggers Err 2 and stops operation. The code can also appear if a heater circuit failure is detected.

No, you should not continue using the microwave while Err 2 is active. The thermistor is a safety component that prevents overheating. Operating the unit with a faulty thermistor circuit means there is no reliable temperature monitoring in place, which could allow the microwave to overheat and cause damage or a fire hazard.

A reset by unplugging the microwave for a minute or two may temporarily clear the display, but Err 2 will return as soon as the control board reads the thermistor circuit again. Because the code is triggered by a measured electrical fault rather than a software glitch, the underlying problem with the thermistor or its wiring must be repaired for the code to stay cleared.

A knowledgeable DIYer can perform the initial diagnosis by disconnecting the thermistor and testing its resistance with a multimeter. If the thermistor reads 0 ohms or infinite resistance, it needs to be replaced. Keep in mind that microwave capacitors can store a lethal charge even when unplugged, so you should discharge the capacitor before working inside the unit.

If only the thermistor needs replacement, the part cost is typically in the range of $10 to $40 depending on the model. If a professional technician performs the repair, total costs including labor generally fall between $80 and $180. If the heater circuit or control board is also involved, repair costs can be higher, and it may be worth comparing against the cost of a replacement unit.