The radiator fan keeps running after the engine is switched off
Updated By CarFaultIQ Editorial Team
Verify with official recall databases, service records, a mechanic inspection, and local market data before relying on this summary.
At a glance
Symptom triage summary
The cooling fan continues running for a period after shutdown. On most modern vehicles a run-on of a few minutes is designed behaviour; a fan that runs for a very long time or until...
UrgencyUrgency not yet verifiedSeverityLowEvidenceSource notes available
What it may indicate
The cooling fan continues running for a period after shutdown. On most modern vehicles a run-on of a few minutes is designed behaviour; a fan that runs for a very long time or until the battery flattens is not.
Possible system
Cooling
Urgency
Urgency not yet verified
Can I drive?
Usually OK to drive short-term
Evidence/confidence
Source notes available
See source & evidence notes below
Short answer
The cooling fan continues running for a period after shutdown. On most modern vehicles a run-on of a few minutes is designed behaviour; a fan that runs for a very long time or until the battery flattens is not.
SeverityLowDrive?Usually OK to drive short-term
Can I still drive with this?
Usually OK to drive short-term
Book an inspection soon.
SeverityLow
Low
Explore vehicle evidence related to this system
Choose your vehicle to see how often owner complaints and official records for it concern Engine cooling and Engine, and in which model years.
This shows records about a system, not whether a particular car has this problem.
Troubleshooting at a glance
UrgencyLow
Check firstTime it — a few minutes is normal, indefinite running is not
Can you drive?Usually OK to drive short-term
Stop driving ifNot a driving safety issue, but a fan that never switches off…
The radiator fan keeps running after the engine is switched off
The cooling fan continues running for a period after shutdown. On most modern vehicles a run-on of a few minutes is designed behaviour; a fan that runs for a very long time or until the battery flattens is not.
What can cause it
Normal post-shutdown run-on to remove residual heat, especially after hard driving or in hot weather
A coolant temperature sensor reading high and keeping the fan commanded on
A failed fan relay stuck in the closed position
What to check first
Time it — a few minutes is normal, indefinite running is not
Note whether it happens after every trip or only after hard driving or hot weather
Check the coolant level, since a genuinely hot engine will keep the fan running for longer
Have the fan relay and temperature sensor checked if the fan runs until the battery is flat
What this symptom does not tell you
An observation narrows the search; it does not identify which of the possible causes applies to your vehicle. Confirm the cause before any part is replaced — several of the causes above produce an identical symptom.
Possible causes
Normal post-shutdown run-on to remove residual heat, especially after hard driving or in hot weather
A coolant temperature sensor reading high and keeping the fan commanded on
A failed fan relay stuck in the closed position
What to check first
Time it — a few minutes is normal, indefinite running is not
Note whether it happens after every trip or only after hard driving or hot weather
Check the coolant level, since a genuinely hot engine will keep the fan running for longer
Have the fan relay and temperature sensor checked if the fan runs until the battery is flat
When to stop driving / seek help
Not a driving safety issue, but a fan that never switches off will flatten the battery, so do not leave the vehicle parked for long periods while it does.
Some 1.0L EcoBoost Focus engines are commonly reported (especially in Europe) to lose coolant from degraded hoses or cracked components, risking sudden…