On the covered LG range or oven, F45 means a Fan Error — LG's own wording. First, listen for the fan when the cooktop is switched on. Then: for F45 LG's sequence is CLEAR/OFF and a retry, then 30 seconds at the breaker if the fan code returns — LG's own sequence.
Differential
Likely causes of “LG range or oven code F45”, and how to tell them apart
- 1
A fan error on an induction or cooktop range
What separates it F45 shows and the cooktop may limit its power
How to confirm LG lists F45 and F46 as fan errors
- 2
Blocked vents or a fan that cannot turn
What separates it The cooktop gets hot and the code appears
How to confirm Clear the vents; do not cover them
- 3
A dirty fan
What separates it A rattle or a whistle
How to confirm Service cleaning
- 4
A failed fan motor
What separates it No sound of a fan when the cooktop runs
How to confirm Service replacement
- 5
A one-off glitch
What separates it The code clears after a reset
How to confirm Reset as LG says
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether you can hear a fan when the cooktop runs
- Whether anything blocks the vents
- How long the cooktop was in use
Try in this order
0 of 6 completedWhat to do first
ReversibleListen for the fan when the cooktop is switched on.
Correct only the documented fault domain
ReversibleFor F45 LG's sequence is CLEAR/OFF and a retry, then 30 seconds at the breaker if the fan code returns — LG's own sequence.
Turn the cooktop off
ReversibleAnd let it cool.
Clear the vents
ReversibleNothing stored or stacked near them.
Press CLEAR/OFF
ReversibleAnd try again.
Listen for the fan
ReversibleWhen you restart.
Model-specific
What is true of this model and not of its siblings
- Why a fan matters
- An induction cooktop makes heat in the pan, and the electronics under the glass make heat of their own. A fan moves air over the electronics to keep them within limits, and the control watches it. If the fan does not turn as expected, F45 appears.
- Vents
- Air enters and leaves through slots near the base or the back. A pan stored on a shelf against the vent, or a wall of packaged goods, restricts the flow. Keep the area clear.
- Sound
- On start-up you should hear a quiet fan. A scrape, a rattle or silence all tell the technician something.
- Pans
- Heavy use with large pans for long periods heats the electronics. A pause lets them cool and can clear a code that was heat related.
- A related code
- F46 is worded identically by LG, so the page's steps apply to both.
- Service
- The technician checks the fan and its wiring. Give the model number.
- What the fan protects
- On a range with an induction cooktop or a dense cooktop control, the electronics that drive the burners sit in a compartment under the glass. They generate heat as they work. A fan keeps air moving over them, and a sensor or the control watches the fan's speed. When the speed is wrong, the control reduces power or stops, and shows F45 or F46.
- What you may notice
- Before the code appears, you might hear a fan that sounds louder than usual, a whine, or a fan that stops while the cooktop is on. The cooktop may also cut power to a burner in the middle of cooking. If you notice these, make a note of them for the technician.
- Keeping air moving
- Do not store anything in the drawer or space directly below an induction cooktop if the manual forbids it, and keep the intake and exhaust vents free. Wipe dust from any visible vents with a dry cloth when the unit is cool, and never spray liquid into a vent.
- Why it can clear
- A fan error caused by heat can clear after the cooktop has cooled. If it does not clear, or returns quickly, a worn motor or a loose connection is likely, and a technician can test it.
Evidence ledger
Sources behind this answer
Exact questions
Common questions
What does F45 mean on a LG range or oven?+
a Fan Error — LG's own wording.
Is it safe to keep cooking?+
Not if the cooktop is overheating; let it cool.
Does it affect the oven?+
The code concerns the cooling fan on induction and cooktop models.