Error code
Dishwasher error code F31
LG dishwasher error code F31: This is one of three codes that share a symptom: the dishwasher washes perfectly and everything comes out wet. Every spelling LG publishes for it, which machines can raise it, and what to do next.
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What we can confirm
Code F31, from the manufacturer's own documentation
A code is only meaningful together with the machine showing it — the same digits mean different things on different equipment.
The code
F31
This is one of three codes that share a symptom: the dishwasher washes perfectly and everything comes out wet. The heat dry system moves warm air through the tub at the end of the cycle, and the fan is what moves it. Losing it does not stop the machine cleaning and it does not need the appliance taken out of service — which is worth saying, because it is the group of codes most often mistaken for a machine that has failed.
or call (305) 419-0291
What it narrows down to
The fan in the drying system has stopped
Diagnostic
From $95, credited to the repair
On the same appliance
What else belongs to the dishwashers
On this make a code belongs to the appliance rather than to a product line. These are the other conditions this machine can display, and the models that can show this one — a display often has more than one thing to say, and the model number decides what any of it costs to put right.
Other codes this appliance can display
The machine has found water where it should not be, and is protecting the floor
Not enough water is arriving, or it is arriving too slowly
The water that went in has not come out
The machine cannot tell how hot the water is
The water is not getting hot, or is getting hot in the wrong way
The motor that drives the spray arms is overloaded or stalled
The machine cannot agree with itself about how much water is in the tub
There is far more foam in the tub than the machine can wash through
The pump that switches the water between the spray levels is not responding
Not an error — the panel has been locked
The drying system cannot reach or hold its temperature
The door that should open itself at the end of the cycle has not
The same digits mean different things on different equipment. Search the full code list
In more detail
About Dishwasher error code F31
What F31 means on this make
This is one of three codes that share a symptom: the dishwasher washes perfectly and everything comes out wet. The heat dry system moves warm air through the tub at the end of the cycle, and the fan is what moves it. Losing it does not stop the machine cleaning and it does not need the appliance taken out of service — which is worth saying, because it is the group of codes most often mistaken for a machine that has failed.
The other ways LG prints this one
F31 · F 31
LG publishes a condition and then every string that can stand for it, and which one your machine shows depends on the panel it was built with — OE, E03 and E21 are one condition on a washer, and Er dS, F dS and r dS are one sensor on different evaporators. They are one page here, so whichever of them you searched for, this is the right page.
Where this appears, and why not to clear it
On the appliance's own display. LG reports errors two ways: machines with a digital display show a code, and the laundry machines without one blink their indicator lights instead. Both are published by the maker and both are on this site. Photograph what the panel shows before cutting the power. On a refrigerator you can also force the last code back onto the display by holding Freezer Temperature and Express Frz together for three seconds — LG documents that, and it is the one thing that makes a first visit more useful. A code that has been reset is information a technician no longer has.
What to do about it
- Check whether the wash itself is still good. If it is, this is a drying problem only.
- Make sure the rinse aid reservoir is not empty — it does much of the drying work.
- Cycle the power at the breaker.
- Book it when convenient. The machine is usable meanwhile.
Where this goes next
The job this usually becomes is diagnostic visit, and that page carries a starting figure and the reasons that move it. If it turns out to be nothing — and on this make a real share of these are modes, reminders and settings rather than problems — the visit ends there and you pay the diagnostic and nothing else, or call (305) 419-0291 and describe what the panel is doing before booking anything.
This article is based on:
- Official manufacturer documentation
- Internal repair procedures
- Technician repair history
- Company quality standards