LG Dishwasher F31 error code
- Dishwasher
On LG dishwashers, error F31 indicates: Dynamic Heat Dry fan motor is not running. Start with a 5-minute power reset at the breaker, then follow the dishwasher-specific checks below before ordering replacement parts for F31. If the code returns on two consecutive cycles after a reset, treat it as a confirmed fault — not a one-time power glitch.
Reviewed August 2025 · sources below
Safe to keep using?
Stop using
Severe overheating requires stopping use until the cause is identified.
- • Unplug the appliance before inspection.
- • Do not continue using the appliance until the cause is identified.
Next step
Still seeing F31?
Show a photo or describe the symptom. Answer a few safety-first questions and see whether a part is needed.
Free guided checks · No account required · Don’t open live electrical, gas, or refrigerant equipment
How to fix F31
- Unplug the dishwasher or turn off power at the breaker before inspecting any components.
- Reset LG F31: leave power off for 5 minutes, restore power, then restart. Confirm whether F31 returns.
- Check the most common cause for F31: Dynamic Heat Dry fan motor is not running.
- Inspect hoses, connections, and visible wiring for damage, clogs, or loose fittings.
- If a reset and basic checks don't clear the code, use our lookup tool for AI-powered diagnosis or contact a qualified technician.
- Reassemble, restore power, and run a test cycle. If F31 returns, the faulty component likely needs replacement.
Call a pro when: Call a technician if you smell burning, see sparking, hear grinding from the motor, or the code returns after replacing the suspected part.
What F31 means
Dynamic Heat Dry fan motor is not running.
Parts for this repair
We don't yet have a verified exact part number for this model. Search for a compatible Dynamic Heat Dry fan motor is not running.
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Likely causes
Many codes resolve with cleaning, resetting, or reconnecting.
Check: Power-cycle the appliance and check for obvious blockages or loose connections.
Est. cost: $0–$0
Wear or electrical failure of an internal part.
Check: If basic checks fail, the faulty component likely needs replacement.
Est. cost: $0–$75
Professional assistance recommended
This issue may be unsafe for DIY repair. Follow the safety guidance above and contact a qualified technician.
Questions about F31
What does F31 error code mean on a LG dishwasher?
Dynamic Heat Dry fan motor is not running.
How do I reset LG dishwasher F31?
Unplug the dishwasher or switch it off at the breaker for 5 minutes, then restore power and restart. A reset clears a stored F31 after a glitch, but the code will return if the underlying fault is still present.
What part do I need for LG F31?
Not always — some F31 errors are caused by user-fixable issues like clogs or unbalanced loads. Try the troubleshooting steps first.
Can I fix LG error F31 myself?
Many F31 errors can be fixed DIY if you're comfortable with basic tools. Start with the reset and steps above. If the issue involves electrical components or the code returns after replacing parts, call a professional.
Other LG Dishwasher codes
Prevent this problem next time
- Follow manufacturer maintenance schedule
- Address small issues before they worsen
Sources
Manufacturer meaning
Dynamic Heat Dry fan motor is not running.
FixApplianceCode guidance
Start with basic checks for LG F31 before ordering parts.
Source type: Part database
Source: ModelPartFinder + FixApplianceCode editorial
Last reviewed: 2026-10-24
Repair guidance is for informational purposes only. We do not guarantee that any fix will resolve your issue, and you assume all risk when following these steps. Terms & disclaimer
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