Whirlpool Dryer Error Code f:31

F:31 means the dryer's electronic control has detected a low voltage condition on the L2 leg of the 240-volt power supply, specifically less than 30 volts. This fault only appears during Diagnostic Test Mode. It points to a problem with the incoming electrical supply, the power cord, or the relay connections on the control board.

You should not continue using the dryer until the cause of the F:31 code is resolved. Operating a dryer with a degraded L2 voltage supply can stress electrical components and may prevent proper heating, leaving clothes damp or causing the motor to work harder than intended. Partial voltage conditions can also indicate wiring problems that pose a fire or shock hazard.

Repair costs vary widely depending on the root cause. If the fix is simply resetting a tripped breaker or reseating a loose power cord, there may be little to no cost involved. Replacing a power cord typically runs in the range of $20 to $60 for parts, while electronic control board replacement can cost anywhere from $100 to $300 or more for the part alone, plus labor if a technician is hired. Outlet or wiring repairs by an electrician add additional cost depending on the scope of work.

Start by checking your home's electrical panel for a tripped breaker or blown fuse on the dryer circuit. Reset the breaker or replace the fuse if needed. Next, confirm the power cord is fully plugged in and properly wired at the dryer's terminal block. If supply power is confirmed good, inspect the relay connections on the electronic control board for looseness or corrosion.

Resetting the dryer may clear the fault display temporarily, but the code will return if the underlying voltage problem is not corrected. Because F:31 only appears in Diagnostic Test Mode, you would need to rerun the diagnostic sequence to confirm whether the fault is still active after any repairs are made.