cooling fan runs after engine is turned off

Questions specifically about a Petrol powered Citroen C3 (usually engine or fuel related problems).
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My Name: Patricia

Posts: 1
Joined: Tue Jul 14, 2020 6:44 am
Model: C3 2009-2013, New shape (A51)
Year: 2011 (11)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 70000
Trim Level: VTR+
Gearbox: Manual 5 speed


Hi i bought my C3 recently its 2011 with 70,000km on the clock. I've recently noticed that the fan is loud and sometimes continues to run after engine is turned off, also I think I can hear it whole driving. Is this normal. No other issues with car. It may be just that I didn't notice it before? Please advise.
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My Name: Ozvtr

Posts: 1249
Joined: Wed Jul 10, 2019 3:31 am
Model: C3 2002-2005, Original shape model
Year: 2003 (53)
Engine Size: 1.4 (8v)
Fuel Type: Petrol
Mileage: 80000
Trim Level: Other
Gearbox: Automatic PRND
Engine name: TU3 (75 PS)
Location: Brisbane, Australia.
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Hi Patricia, welcome.

It's not uncommon for the thermo fan to run for a few seconds (maybe up to a minute) after the engine is switched off. Particularly on hot days.
If you are using your air conditioner, the higher the load on the system (hotter the day) the faster the thermo fan will run. The air conditioning works by removing heat from cabin and putting into the condenser in front of the radiator. The thermo fan cools both the radiator and the condenser. So on a hot day it has it's work cut out for it and can get a bit loud.
My Name: C3POster

Posts: 4
Joined: Wed Jul 29, 2020 5:47 pm
Model: C3 2009-2013, New shape (A51)
Year: 2012 (62)
Engine Size: 1.6 (16v)
Fuel Type: Diesel
Mileage: 50000
Trim Level: VTR+
Gearbox: Manual 6 speed
DPF: Yes
Engine name: DV6 16-valve diesel DPF-FAP (110 PS)
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I would imagine you have a petrol car, let me know if it's diesel as this makes a difference. If diesel it may just be a regen.

Have you been trying to use your air con lately ??

It may be that you car is running low on air con gas R134a.

Or has not been done correctly, which is hard not to do correctly but it does happen, too much pressure or gas within the system etc. Many think that this can not happen as the air con machines are calibrated and can not put too much in, but trust me it does continue to happen.

Check your air con for refrigerated air, not just cold.

It could well just be you need a top up, very common issue, and fans will kick in to cool the system.
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