When my A/C compressor operates, the engine cooling fan operates along with it. OK, normal.

 

Alright now when I'm cruising down the road using the A/C, does the engine cooling fan still operate in concert with the compressor?

Damn, this is so simple... Why don't you get out and check???

 

That is one diagram I didn't download when I had my alldata account. But, I am relatively sure that the fan is turned on via the A/C or defroster switch.

 

Good idea if you are stuck in traffic and it's hot out to turn on the A/C, which will keep the fan running.

Thanks Tiny.

 

My question arises from the fact that the A/C fans:

 

1. Wear out.

2. Are huge resource hogs.

3. Are not nesessary at speeds above 25mph / 40kph.

 

It bugs me to think that the fans may be running in concert with the A/C compressor when I'm cruising on the highway. Is it possible that someone knows the answer to this question?

yes they are running the car is smart, but the a/c can't tell if you are moving so they take the safe route and assume you're not.

So if you are driving 50 MPH, the wind speed is bogging down your fans, and the fans are blocking the forcible wind to the radiator.

 

I am pretty sure my 93 Impreza's fans don't continuously run with the A/C on. Maybe it does, in 6 years I may have never realized it.

 

 

MAX

OK, someone strap a camcorder inside the engine bay and find out what happens!!

 

I already did the intake temp experiment, so I'm through for the year!