Turning on the a/c

[caineroad]

Originally Posted by Bluevitz-rs

The A/C will cycle on and off to maintain a temp range preset by the system at the condenser. It doesn't matter what you set the temperature at because the system heats the air after it's cooled. The higher you set the fan the faster it warms the condenser and the more the system has to cycle to keep cooled, so you use more fuel.

That's really helpful. Thanks

On the other hand, in winter you dont use the compressor for heat. Does cranking up the fan or turning the heat dial changes fuel efficiency?

[Bluevitz-rs]

Originally Posted by caineroad

That's really helpful. Thanks

On the other hand, in winter you dont use the compressor for heat. Does cranking up the fan or turning the heat dial changes fuel efficiency?

Sorry didn't really read this post...

If you have the defrost on the A/C is running all the time. In the winter it will still cycle if the condenser gets warm enough.

Running the heat will only effect warm up time in the winter, which greatly effects millage. I usually don't turn the fan on until the blue light turns off and even then only on low until the car gets up to about 160°. (I have a gauge)