Haier Washer Error Code Err3

Err3 on a Haier washer indicates a temperature sensor fault. Specifically, the control board has detected that the resistance value from the temperature sensor has deviated more than 2 ohms from the expected specification. This prevents the washer from accurately monitoring water temperature, which can disrupt heating and cycle completion.

It is not recommended to continue running the washer with Err3 active. Without a functioning temperature sensor, the control board cannot reliably regulate water temperature, which could result in clothes being washed at incorrect temperatures or the cycle not completing properly. Addressing the fault before further use will prevent potential damage to laundry or the appliance.

If the issue is simply a loose connector, there may be no parts cost at all. Replacing a faulty temperature sensor is generally an affordable repair, with parts typically ranging from $15 to $50 depending on the specific model. If the control board is found to be at fault, repair costs will be higher, generally falling in the range of $100 to $300 for parts and labor.

Start by checking that the temperature sensor wiring connector is firmly seated and free of corrosion or damaged pins. If the connection looks secure, use a multimeter to test the thermistor's resistance and compare it against the specified value. A reading that falls outside the 2-ohm tolerance means the sensor should be replaced. If the sensor and wiring both test correctly, the control board may need further inspection.

A reset may temporarily clear the error display, but Err3 will return if the underlying fault with the temperature sensor or its wiring has not been corrected. The control board triggers the code based on a real resistance deviation reading, so the physical cause must be diagnosed and repaired to permanently resolve it.