Radiator fan permanently on

[DomP182]

As in the title really, my radiator fan comes on on start up and runs permanently, what might be causing this, the fuse box seems to have quite a few more empty slots than my 182 ever did.

 

[JamesBryan]

Try the AC pressure sensor.

 

[DomP182]

Try the AC pressure sensor.

Stupid question but where's that?

 

[bloke]

Coolant temp sesnor.

 

[DomP182]

Just been researching my high 1300-1500 idle and slow to drop revs and from what I've read that could also be cts.
Are these two issues, the fan being on and high idle/slow dropping revs be related?

 

[DomP182]

Now is the time to hold my hands up and admit I'm an idiot! The aircon was on! Fan problem solved.

High idle was an air leak from a hose and quite possibly the inlet manifold seal as well, stripped down lubed o ring and clamped loose hose and it's idling much better.