Kenmore Dryer Error Code E31

E31 means the dryer's contact sensor is reporting a frequency that is too high, which falls outside the normal operating range. The contact sensor measures moisture in the drum by detecting electrical contact as clothes tumble across sensor bars. This code is typically caused by a foreign object interfering with the sensor bars or a defective electronic control board. The dryer will not complete a normal cycle until the fault is diagnosed and corrected.

It is not recommended to continue running the dryer while the E31 code is active. The contact sensor fault means the dryer cannot accurately measure moisture levels, which could result in clothes running too long or cycles not completing properly. If a foreign metal object is causing the interference, continued operation could also pose a risk to the drum or other components. Address the fault before resuming normal use.

A power reset by unplugging the dryer for a few minutes may temporarily clear the E31 code, but if the underlying cause is still present the error will return. A foreign object on the sensor bars, a defective control board, or a faulty sensor will continue triggering the fault until the physical problem is corrected. A reset can be useful for confirming whether the error reoccurs, but it is not a fix on its own.

Start by inspecting the inside of the drum for any small metal objects like coins or zipper pulls that may be resting on or between the sensor bars. Clean the sensor bars with rubbing alcohol to remove any residue buildup. If the drum and sensor look clean and undamaged, check the sensor wiring harness for damage or loose connections. If all of those checks come back normal, the electronic control board will likely need to be replaced.

The cost depends on the root cause. If cleaning the sensor bars or removing a foreign object resolves the issue, there may be no parts cost at all. If the contact sensor needs replacement, parts and labor typically range from around $50 to $150. Replacing the electronic control board is the more expensive repair, with total costs generally ranging from $150 to $350 depending on the specific model and labor rates in your area.