Thread: Viscous fan Temp

Originally Posted by LandyAndy

Does it have aircon?????
I would have thought ALL aircon vehicles have the booster fans!!!!!
Andrew

Nope only the later "long nose" defenders have a booster fan for air con.

Its not technically a requirement for a vehicle with a engine driven fan.

Probably the reason Defender aircon is very average!!!
Andrew

Originally Posted by tombraider

Its not technically a requirement for a vehicle with a engine driven fan.

But having one will increase the effectiveness of the A/C at low vehicle speeds and prevent excessively high A/C pressures. I wouldn't want an A/C system without one (or two).

Originally Posted by LandyAndy

Hi Baz
Next time yours is on note if the aircon is off.The D2 temp gauge seems to sit in the middle regardless of it getting hot.The booster is controled by the ECU.
Im thinking its your electric booster fan cutting in,much louder than the engine driven fan.
Try turning the aircon on at about the same speed/revs you do when off-roading with the window open,it will confirm if its the booster.
Once a overheat is registered that fan will run all the time until cleared by testbook.Even if the gauge hasnt looked like getting hot.
Start checking for bulging radiator hoses when hot,smelling slight sniffs of coolant after a hot run.Signs of a headgasket starting to leak.If you get it early you should getaway with the gasket only(and dowels if you still have plastic ones).
Hopefully Im wrong,but thats how mine started.
Andrew

This noise is very apparent, but only when excellerating, the elec fans i know of and only work alot when the aircon is on.

Baz.