Frigidaire Washer Error Code E31

E31 indicates a moisture sensor fault on Frigidaire washers equipped with contact-style moisture sensor bars. The error means the control board is detecting an abnormal signal from the sensor circuit, which can be caused by a foreign object near the bars, a wiring problem, sensor bar misalignment, a short circuit, or a defective control board. This code only appears on models that include moisture bar sensors.

A reset may temporarily clear the code, but if the underlying fault is still present, E31 will return once the washer runs through its cycle and the control board checks the moisture sensor again. A reset is not a fix. The root cause must be identified and corrected to permanently resolve the error.

If the fix involves only clearing a foreign object or reseating a wire connector, the cost can be minimal or nothing beyond your time. If a wiring harness repair is needed, costs will vary by the extent of the damage. If the electronic control board requires replacement, expect to spend anywhere from $150 to $350 or more depending on the specific model and whether you use a professional technician or handle the repair yourself.

In many cases, yes. Start by inspecting the moisture sensor bars inside the drum for any debris or foreign objects that may be interfering with the contacts. Also check that the wiring connections at the moisture bars and at edge connector J3 on the control board are fully seated and undamaged. These steps require no parts and resolve a good portion of E31 faults.

It is generally not recommended to continue running the washer with an active E31 fault. The moisture sensor plays a role in how the machine manages drying-related functions, and operating with a faulty sensor signal can lead to incomplete cycles or further stress on the control board. Diagnose and resolve the fault before resuming regular use.