ASKO Washer Error Code F31

F31 on an Asko washer means the control board cannot detect the NTC1 temperature sensor during operation. NTC1 is the primary thermistor used to monitor wash water temperature. The washer stops the cycle when this sensor is missing or unreadable to prevent unsafe operation. The fault points to a disconnected, damaged, or failed temperature sensor or its wiring.

You should not continue running the washer while F31 is active. Without a functioning temperature sensor, the control board cannot regulate water heating safely, which could result in overheating or inadequate washing performance. The washer is designed to halt operation when this fault is detected, and running it in this condition is not advisable.

Repair costs vary depending on the root cause. If the fix involves reconnecting a loose connector or cleaning corrosion, costs may be limited to a service call fee, typically in the range of $75 to $150. If the NTC1 thermistor itself needs replacement, parts and labor combined can range from $150 to $300 or more, depending on your location and service provider.

Some causes of F31 are accessible to a knowledgeable DIYer, such as reconnecting a loose sensor connector or cleaning corroded pins. However, confirming a failed NTC1 thermistor requires a multimeter to test resistance, and replacing the sensor involves accessing internal components of the washer. If you are not comfortable working inside the appliance, a qualified technician should perform the repair.

A reset may temporarily clear the F31 code from the display, but it will return as soon as the washer attempts to operate and again cannot detect the NTC1 sensor. The underlying cause, whether a loose connection, damaged wire, or failed sensor, must be identified and corrected before the fault will stay resolved.