Idle rpm.

[Mrdeli]

I note that once warmed up the idle on my car is around 750rpm, but increases to around 850rpm if I turn the air con on. Is this significant?

 

Thanks mark.

[ATTAK Z]

It's normal

[Mrdeli]

Great stuff. Thanks for the quick reply

[Zugara]

Engine needs to work harder if air con is on, hence increase in rpm....

[KyleR]

Also, hence why they say using air con at slow speeds uses up 10-20% more fuel and recommend opening the window instead and only using AC if traveling fast as the open window does more damage to the MPG...

[ATTAK Z]

Also, hence why they say using air con at slow speeds uses up 10-20% more fuel and recommend opening the window instead and only using AC if traveling fast as the open window does more damage to the MPG...

AC is not just for hot days ! I think most Zedders leave it on 24/7 to combat condensation.

[spursmaddave]

Also, hence why they say using air con at slow speeds uses up 10-20% more fuel and recommend opening the window instead and only using AC if traveling fast as the open window does more damage to the MPG...

AC is not just for hot days ! I think most Zedders leave it on 24/7 to combat condensation.

 

+1 especially on cold damp days like at the moment otherwise my rear window fogs up terribly.

 

Also it is good to use the air con all year round otherwise you can have problems with bacteria and all sorts of nasty stuff

[KyleR]

Yes, it's great for condensation, but I turn it off after the window has cleared.