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Engine bay fans running in after engine switch off
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daftlad
 


Member Since: 12 Jun 2016
Location: Worksop , Nottinghamshire
Posts: 712

United Kingdom 2009 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3
Engine bay fans running in after engine switch off

Evening all
Our new to us D4 .2014 SDV6 has started to let the engine bay fans run on after we stop the car
This is after using the heaters ,had it about 5 months but not used heater much until now
Is this normal , I can pug in to an Icarsoft it anyone thinks it would log a fault if there is actually a fault
I’ve had it back to the dealer for a very slight coolant leak from somewhere above the starter motor which they said was a clip,I though it was coming from the EGR as it had the inlet manifold done offside last may ,I wondered if they had disturbed the coolant pipe to the EGR
Can’t ember the D3 doing it
Thanks
Phil
  
Post #23552667th Dec 2023 7:29 pm
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NikBrown27
 


Member Since: 09 Feb 2021
Location: Earls Colne
Posts: 174

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Barolo BlackDiscovery 4

Is it possibly the FBH as we've had a cold snap?
  
Post #23552697th Dec 2023 7:47 pm
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daftlad
 


Member Since: 12 Jun 2016
Location: Worksop , Nottinghamshire
Posts: 712

United Kingdom 2009 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

Not sure , would that be off by then ? ,seems noisier than that
I’ll pop the bonnet next time I get to drive it
  
Post #23552707th Dec 2023 7:58 pm
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NikBrown27
 


Member Since: 09 Feb 2021
Location: Earls Colne
Posts: 174

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Barolo BlackDiscovery 4

If it's cold they can run on a bit after you shut the engine down.
  
Post #23552717th Dec 2023 8:06 pm
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daftlad
 


Member Since: 12 Jun 2016
Location: Worksop , Nottinghamshire
Posts: 712

United Kingdom 2009 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

The wife said it did it today we have around 4 dg today with loads of rain for a change
  
Post #23552727th Dec 2023 8:24 pm
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popsdosh
 


Member Since: 09 Nov 2009
Location: cambs
Posts: 442

United Kingdom 2016 Discovery 4 3.0 SDV6 Graphite LE Auto Corris GreyDiscovery 4

It will be the FBH and they will will be active below 7 degrees exterior temp . It keeps on running after engine shutdown to purge the system for several seconds especially after a short journey when engine hasnt achieved full temp . All very normal.
  
Post #23553108th Dec 2023 10:00 am
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Hardware
 


Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 13018

United Kingdom 2011 Discovery 4 3.0 SDV6 XS Auto Sumatra BlackDiscovery 4

I thought the Disco had a mechanically-driven fan? I know it has some "clever" bits but didn't think it ran just on electrickery.

am I wrong ?
  
Post #23553198th Dec 2023 1:42 pm
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popsdosh
 


Member Since: 09 Nov 2009
Location: cambs
Posts: 442

United Kingdom 2016 Discovery 4 3.0 SDV6 Graphite LE Auto Corris GreyDiscovery 4

I am pretty sure the OP is describing the FBH fan that does run on after engine shut down to purge the FBH when its been operating.
  
Post #23553658th Dec 2023 10:53 pm
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daftlad
 


Member Since: 12 Jun 2016
Location: Worksop , Nottinghamshire
Posts: 712

United Kingdom 2009 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

Hope so but does sound quite load
Probably not cold enough here his weekend for FBH to kick in so if it happens today I will pop bonnet to see
Looks like the main fans shouldn’t run on
Fingers crossed 🤞
  
Post #23553809th Dec 2023 9:15 am
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daftlad
 


Member Since: 12 Jun 2016
Location: Worksop , Nottinghamshire
Posts: 712

United Kingdom 2009 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

Update
I tried the remote for the timed climate as I had to get a new battery
Glad to say it works on first time of using
It’s the FBH after all I can hear running
Thanks all

I never remember this on our D3 though but that could be age
  
Post #23553959th Dec 2023 12:00 pm
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kim0785b
 


Member Since: 12 Feb 2021
Location: London
Posts: 141

United Kingdom 2015 Discovery 4 3.0 SDV6 SE Auto Santorini BlackDiscovery 4

I wouldn’t worry, the FBH on ours seems to run on after while after a long journey, I suspect it’s probably to continue the flow of coolant to the engine even after shutting off as having the FBH pump running perhaps cools the engine down quicker?

Shocked
NikBrown27 wrote:
Is it possibly the FBH as we've had a cold snap?
 Discovery 4
Oct 2015, 2016 build
SDV6 Santorini Black SE
New engine at 42k
Car camper 
 
Post #235687026th Dec 2023 5:26 pm
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