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LG Dishwasher F31 Error Code

Heat dry fan not running. Here is what it means and how to clear it, easiest fix first.

F31
May need a pro

On models with Dynamic Heat Dry, the drying fan motor is not running. The fan motor or a related component has likely failed.

Dynamic Heat Dry models only.

Safety first: unplug the dishwasher (or switch off its breaker) before touching filters, hoses or panels. If you smell burning or gas, or see water near the outlet, stop and call a professional.

How to fix LG F31

  1. Reset the power

    Turn the dishwasher off, then switch off its circuit breaker for about 10 seconds and switch it back on. Power the unit up and start a fresh cycle to see whether the code returns.

  2. Note the code and model number

    Write down the exact code, when in the cycle it appeared, and the model and serial numbers from the rating label (usually on the side or top edge of the door or tub). With nothing safe left to check yourself, this lets the technician bring the right part on the first visit.

When to call a technician

If F31 returns after a reset, request service for the heat dry fan.

Parts that commonly cause F31

Order parts by your exact model number so they fit.

Other LG dishwasher codes

Frequently asked questions

What does F31 mean on a LG dishwasher?

On models with Dynamic Heat Dry, the drying fan motor is not running. The fan motor or a related component has likely failed.

Can I fix LG F31 myself?

Only the basic checks. You can safely try the steps above, but F31 usually points to a part or fault that needs a technician.

What if F31 keeps coming back?

A code that returns after a reset and the checks above usually means a part is wearing out. Note when F31 appears (which cycle, how often) and have your model number ready; it helps a technician bring the right part on the first visit.

Last reviewed 2026-10-19. Codes and steps can vary by model; check your owner's manual.

References