Needed to move the FF yesterday. From cold the engine was running for less than a minute as I moved it 10 feet then turned the engine off. I didnt lock it as I was going to clean the rear luggage compartment (calling it a boot seems a bit common for an FF). The car had been stood for about three minuets when I heard a noise (I was outside near the front off side wheel) that seemed to be a 'fan' type noise coming from the area of the scuttle and lasting about 15 seconds. I wouldn't have thought anything would have been on long enough to need cooling, but what else could the noise be? QUID FACIUM TIBI
ANTEQUAM ALIIS

2003 TD6 VOGUE Zambezi Silver
tows 2006 Lunar Delta 540/2

ECU box under the bonnet has a fan to cool it, it will come on pretty often in this weather even without the engine on for long, it vents to the inside just above the brake pedal....  Pete
I now have permission from the boss to use Y.O.L.O. Enjoy life
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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand Sold
2002 L322 Vogue 4.4 V8 Epson Green (Fatty Offroader) Sold
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My FBH will occasionally do this, sometimes without even starting the engine, just opening the bonnet seems to be enough encouragement!

(Note FBH been broken for years, either pump (what a stupid place to put it) or glowplug (too lazy to drain down / remove inner mudguard))  .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

This issue is caused by FBH circuit board having blown it's caps. Any action that will wake up the car CAN bus will also wake the FBH which, due to the fault will start it's fan. The circuit board can be, and should be fixed. It can eat the battery and it will also disable the FBH.
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DJ

Anybody know how to go about this, or disable it? Cheers. QUID FACIUM TIBI
ANTEQUAM ALIIS

2003 TD6 VOGUE Zambezi Silver
tows 2006 Lunar Delta 540/2

Fuse 59, according to others on here and my handbook ('02), to disable.

Removal is battery out, wheel off, inner wheel arch liner out, drain or clamp coolant pipes, remove FBH. Fix FBH , then refit in reverse order. There is a Rover 75 chap, French Mike, who repairs the circuit boards...

Thanks doclees for the info about the circuit board. Not been causing any battery problems here though... .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

No need to remove battery jo
Get to it all under wheel arch