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Home > Puma (Tdci) > Air con radiator fan - when should it be running?
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bear100



Member Since: 22 Mar 2010
Location: South Wales
Posts: 1976
Wales 2010 Defender 110 Puma 2.4 USW Santorini Black
Mine runs as soon as the ac is switched on, it will run for about 5 mins then shut down for 1 min
It’s been doing this for as long as I can remember 2023 Defender L663 V8
2016 Range Rover Autobiography 4.4 TDV8 (gone)
2010 110 XS Utility 2.4TDCI
2010 Range Rover Sport TDV8 (gone)
2007 Discovery HSE TDV6 (gone)
1993 110 csw 200 tdi (gone)
1994 90 HT 300 tdi (gone)
1994 discovery 300tdi (gone)
90 hybrid 3.5 v8 (gone)
Range rover bobtail 3.5 v8 (gone)
Post #838759 21st Jun 2020 5:37pm
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yorkshirelandy



Member Since: 26 May 2015
Location: East Yorkshire
Posts: 53
United Kingdom 2009 Defender 110 Puma 2.4 XS CSW Santorini Black
Thanks Bear,

I might have to check the fan relay and the fan itself then.

I suspect one of them may have failed.

The fuse I replaced covers the fan and compressor I think so that should be good. '09 Puma 110 CSW XS
Post #838765 21st Jun 2020 5:53pm
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Angus_Beef



Member Since: 30 Apr 2015
Location: Oslo
Posts: 434
Norway 2015 Defender 110 Puma 2.2 SW Corris Grey
Just to muddy it up a bit, my electric fan on the front only comes on when the AC is on *and* it is very hot. For expample driving slowly off road in Sardinia. Then it is on and off again quite a lot. Has dont this since new, and seems to be thermostatic.
Post #838893 22nd Jun 2020 2:40pm
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yorkshirelandy



Member Since: 26 May 2015
Location: East Yorkshire
Posts: 53
United Kingdom 2009 Defender 110 Puma 2.4 XS CSW Santorini Black
DeeEss that makes some sense as I've also found this on another forum (all be it for discos) but I assume they are very similar systems.


"Engine cooling fan control
While the A/C system is on, operation of the electric engine cooling fan, to assist refrigerant condenser operation, is determined by a combination of vehicle speed and external air temperature. When cooling fan operation is required, the ATC ECU outputs a cooling fan request to the ECM, which then energises the cooling fan relay. The cooling fan
request is output if vehicle speed is 50mph (80 km/h) or less while the external air temperature is 28 °C (82 °F) or more. The request is cancelled, and the cooling fan switched off, if either the vehicle speed increases to 62mph (100 km/h), or the external air temperature decreases to 25 °C (77 °F)". '09 Puma 110 CSW XS
Post #838896 22nd Jun 2020 2:48pm
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