LG Dishwasher F31 error code
| What it means | Heat Dry fan issue — the drying fan motor is not running. |
|---|---|
| Fault familyOften restricted airflow rather than a failed heater — check the cheap thing first. | Heating or temperature |
| Same fault, other codes on this brandthis brand shows only one code for it | — |
| Step 1 | Dishes will still wash; only drying is affected. |
| Step 2 | Book service for the fan motor. |
| Same fault on other brandsuseful when the house has two machines, or when searching a repair forum | Samsung 3E · Samsung HC · Samsung HE |
| Service call? | Yes — the maker says so |
Notes
- F31 on a LG dishwasher means: Heat Dry fan issue — the drying fan motor is not running.
- LG uses a single code for this fault across its dishwasher range, so anything you find under F31 applies.
- Across brands this is the same fault as Samsung 3E, Samsung HC, Samsung HE. No manufacturer publishes that mapping, because each one documents only its own codes — but the underlying failure and the order you check things in are identical.
- LG classifies this as a service call. That is not a disclaimer — for this family it means opening the machine puts you next to something that is either live, pressurised or holding water.
- Clearing the code is not fixing it. Every one of these machines will show the code again on the next cycle if the underlying condition is still there. A code that clears and stays away means the fix worked; a code that clears and comes back means it did not.
What the code means
LG dishwasher, code F31 — Heat Dry fan issue — the drying fan motor is not running.
Fault family: Heating or temperature.
The same fault under other names
| Where | Code |
|---|---|
| This brand, other model years | — |
| Other brands | Samsung 3E, Samsung HC, Samsung HE |
Manufacturers document only their own codes, so nobody publishes that second row. It matters more than it looks: a household usually owns two brands over time, and a repair thread that solves your problem is often written about the other one.
Work the checks in order
The steps below are ordered so the free ones come first. That is also the order in which the causes actually occur — the cheap check is cheap because it is the common cause, not despite it.
Start with: Dishes will still wash; only drying is affected.
Clearing the code is not the fix
Every machine here will show the code again on the next cycle if the condition that caused it is still present. Two outcomes are worth telling apart:
- the code clears and stays away — the fix worked
- the code clears and returns — it did not, and the next cycle costs you the same diagnosis again
Cutting power for a minute clears the display on nearly all of these. It does not tell you anything about the fault.
When to stop and call someone
A code is a service call when the next step would put you next to something live, pressurised, or holding water above the door line — or when the maker itself says so, which is noted on this page where it applies.
Everything else on this list is a filter, a hose, a latch or a load. Those are worth twenty minutes before anyone charges a call-out fee.
Nearby sizes
Read more
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