Air con?

[Stuarty]

When the air con is switched on should the revs rise like most other cars do as mine is not?

[Duncan]

Should normally rise a bit as the compressor kicks in. Are you getting conditioned air? i.e. is the Air Con working as normal and the compressor actually kicking in?

[ed taylor]

The engine has to work a little harder when there is a load put on the electrics so it does speed up a bit to compensate.

[Stuarty]

I cant hear it kicking in and its hard to tell if its working as its so ****** cold outside at the moment but when the windscreen is misted if i turn on the fan to demist the window it takes ages but if i switch on the aircon it will demist it in a matter of seconds?

[Stuarty]

Ah so is it an electric pump rather than belt driven?

[Duncan]

I cant hear it kicking in and its hard to tell if its working as its so ****** cold outside at the moment...

At low outside temperatures the cooling unit (cooling compressor) switches off automatically - so that'll be why you won't hear it kicking in or the revs rising.

....but when the windscreen is misted if i turn on the fan to demist the window it takes ages but if i switch on the aircon it will demist it in a matter of seconds?

But it'll still condition the air, hence why it will still demist the screen more quickly.

[Big Sig]

I'm pretty sure its belt driven with a magnetic clutch unit. My rev's don't rise

[Duncan]

Yep, but when it does kicks in, i.e. the clutch engages, it'll be putting more load on the engine so the revs will rise a bit accordingly.

[Big Sig]

Yep, but when it does kicks in, i.e. the clutch engages, it'll be putting more load on the engine so the revs will rise a bit accordingly.

Maybe, but when switching the CC to eco and back it only flucuates a little, but they do not stay at a constant risen level as they did in my old astra. Unless the quick rise is what you all mean?

[Stuarty]

Ok cheers guys thats great it aint broken thats good to hear lol.Thanks for your help on the matter apreciate it