ASKO Washer Error Code F3

The F3 code on an Asko washer indicates a thermistor fault, meaning the machine has detected either an open circuit or a short circuit in the temperature sensor circuit. The thermistor monitors water temperature so the machine can control heating during the wash cycle. When the control board cannot get a valid reading from the thermistor, it displays F3 and typically stops the cycle. The fault points to the thermistor itself, its wiring, or the connectors between the sensor and the board.

Resetting the washer by unplugging it for a few minutes may temporarily clear the F3 code, but if the underlying fault with the thermistor or wiring is still present, the error will return as soon as the machine runs another cycle. A reset is useful for ruling out a transient electronic glitch, but a recurring F3 code means the thermistor circuit needs to be properly diagnosed and repaired.

Repair costs vary depending on the root cause. If the fix involves only reseating a connector or repairing a wire, costs are relatively low and may primarily involve a service call fee, typically in the range of $75 to $150. Replacing the thermistor itself is generally inexpensive in parts, though total repair costs with labor often fall between $100 and $250. If the control board requires replacement, costs can rise to the $200 to $450 range depending on parts availability and labor rates.

Some causes of the F3 error are DIY-friendly, such as reseating a loose connector or inspecting the wiring harness for visible damage. Testing the thermistor with a multimeter is also within reach for a knowledgeable DIYer who is comfortable working with appliance wiring. However, replacing internal components like the thermistor or control board requires careful disassembly, and if you are not confident working safely with appliance electronics, a qualified technician is the better option.

It is not advisable to continue using the washer while the F3 fault is active. Without a reliable temperature reading, the machine cannot properly regulate water heating, which could result in water that is too hot or heating that does not stop at the right time. Most Asko washers will halt the cycle when F3 is triggered, and bypassing this safeguard is not recommended.