- Appliances
- Ovens
F27
LG F27 on a range: cooling fan locked during self clean
Risk level
High
Professional inspection is recommended.
Urgency
Medium
Quick answer
On an LG range, F27 means the cooling fan stalled or locked during self clean. LG says to turn the circuit breaker off for 30 seconds and back on; if it continues, the unit needs service.
Safety first
Stop and check this first
- After a self clean interrupted by F27, do not open the door or touch the front until the range has cooled: the cavity reaches very high temperatures.
- Do not run self clean again while F27 keeps returning: the fan that cools the range is not working as it should.
Safe checks you can perform
- Code and timing
- Let it cool without forcing the door
- Circuit breaker off for 30 seconds
Leave these tasks to a qualified professional
- Do not attempt this professional task: Cooling fan check
- Do not attempt this professional task: Board fan drive check
- Do not attempt this professional task: Fan test after the repair
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Cooling fan check
What they doWith the range isolated and cold, the technician checks the fan turns freely, cleans it if needed and measures its motor and wiring with a multimeter against LG's specification.
They must show youthe fan turning and the values measured against the specification.
In writingwhat was found and, if the fan is replaced, its part number and the reason.
Board fan drive check
What they doIf fan and wiring are fine, the technician uses the service documentation to check the board output that powers it.
They must show youthe test of the board output.
In writingthe part replaced, its part number and the reason.
Fan test after the repair
What they doTo finish, the technician checks the fan starts when the range calls for it and that F27 does not appear.
They must show youthe fan running with no code.
In writingthe test carried out, the result and the date.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Code and timing
- Who:
- you, no tools.
- How:
- photograph the display showing F27 and note whether self clean was running and for how long.
- Result that matters:
- confirming the warning appeared during self clean.
- If it appeared during self clean:
- that is the situation LG describes; go on to letting it cool.
- If it appeared during other use:
- tell the technician, as it changes what they check first.
- Evidence to keep:
- photo of the display and the time.
Evidence: LG Range - Error Codes List
Let it cool without forcing the door
- Who:
- you.
- How:
- do not try to open the door or touch the front; let the range cool completely before any other step.
- Result that matters:
- avoiding burns after an interrupted self clean.
- If the door unlocks by itself as it cools:
- still wait before the breaker reset.
- If the door stays locked once cold:
- do not force it; mention it to the service centre.
- Evidence to keep:
- note of the waiting time and the door state.
Evidence: LG Range - Error Codes List
Circuit breaker off for 30 seconds
- Who:
- you, at the breaker panel.
- How:
- turn the range breaker off for 30 seconds and back on, which is the only step LG gives for F27.
- Result that matters:
- whether the warning clears after the reset.
- If it does not return:
- use the range normally and watch the next self clean.
- If it returns or you cannot do the step:
- LG says it needs service; do not run self clean again until it is checked.
- Evidence to keep:
- time of the reset and the result.
Evidence: LG Range - Error Codes List
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Appliances
- Brand
- LG
- Product type
- Ovens
Known code variants
- 27
- cocina LG error F27
- code erreur F27 chaudière Vaillant
- code erreur F27 lave-linge Siemens
- codice E27 Siemens
- codice F27 Vaillant
- código E27 Siemens
- código F27 Vaillant
- E00-27
- erreur E27 Siemens
- error F27 caldera Vaillant
- error F27 lavadora Siemens
- Error F27 Saunier Duval
- errore F27 caldaia Vaillant
- errore F27 lavatrice Siemens
- F 27
- F27 Siemens
- Fehlercode F27 Vaillant
- Glow worm boiler F27
- Glow worm F27
- Glow-worm F.27
- Glow-worm F27
- Glow-worm F27 flame signal
- LG F27 cooling fan self clean
- LG F27 ventilador autolimpieza
- LG horno F27
- LG oven error F27
- LG range F27
- panne F27 Vaillant
- Saunier Duval F.27
- Siemens E27
- Siemens F27
- Siemens Fehlercode E27
- Siemens Waschmaschine Fehler F27
- Siemens washer F27
- Siemens washing machine E27
- ThemaFast Condens F.27
- Vaillant boiler F27 fault
- Vaillant F.27
- Vaillant F27
- Vaillant Fehler F27
What it means
LG US defines F27 as the cooling fan stalled or locked during self clean. Unlike most of its codes, for F27 LG does not suggest pressing CLEAR/OFF: the step is to go straight to turning the circuit breaker off for 30 seconds and back on. If the problem continues, the unit needs service. The code means the electronics did not detect the fan turning when it should; the fan, something braking it, its connection or the board may be responsible, and on its own it does not prove the fan has failed.
Warnings and stop conditions
- Higheditorial warning
After a self clean interrupted by F27, do not open the door or touch the front until the range has cooled: the cavity reaches very high temperatures.
Evidence: LG Range - Error Codes List
- Mediumeditorial warning
Do not run self clean again while F27 keeps returning: the fan that cools the range is not working as it should.
Evidence: LG Range - Error Codes List
Symptoms and causes
Probable causes · in order
- One-off detection during self cleanPossible
After the 30 second reset, the code does not return on the next use. No repair needed, but watch the next self clean.
Evidence: LG Range - Error Codes List
- Fan held back or failedPossible
The fan does not turn because of dirt, an obstruction or a damaged motor. Only the technician checks it with the range isolated.
Evidence: LG Range - Error Codes List
- Fan connection or boardPossible
If the fan turns freely, the fault may lie in its wiring or the board that powers and monitors it.
Evidence: LG Range - Error Codes List
Virtual technician
Does F27 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
LG · 2026 · official_doc
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