WTF does Max A/C do?

[goof2]

Originally Posted by Particle Man

No we won't!

[Rangerscott]

I don't have A/C. I use natures a/c thats usually not that cold during this time and can be filled with dirt. Mmmmm.......breath in that fresh nature a/c boys.

[fasternyou929]

Originally Posted by Particle Man

crack 'em open and go 60 down the highway and let the air get sucked out and pushed out by the recirculating AC

Or take the bike.

I hate to do it to you in a non-fashion related thread, but I think 'slice has the right idea here.

You actually make your A/C less efficient by using recirculate with the windows down because air is being drawn out of the cabin; the same air your A/C is trying to draw in. You'll get more air flowing through the system with your window down if you let it use the outside air (which, in that scenario, is also cooler to begin with).

Try driving with a window open and hit the recirculate button on your A/C. At the same fan speed, there will be considerably less air coming out of the vents than you have in non-recirculate mode.

Originally Posted by Rangerscott

I use natures a/c thats usually not that cold during this time and can be filled with dirt.

I must've read this 10x and I still can't figure out what you're trying to say.

[Particle Man]

Originally Posted by fasternyou929

I hate to do it to you in a non-fashion related thread, but I think 'slice has the right idea here.

You actually make your A/C less efficient by using recirculate with the windows down because air is being drawn out of the cabin; the same air your A/C is trying to draw in. You'll get more air flowing through the system with your window down if you let it use the outside air (which, in that scenario, is also cooler to begin with).

Try driving with a window open and hit the recirculate button on your A/C. At the same fan speed, there will be considerably less air coming out of the vents than you have in non-recirculate mode.

I must've read this 10x and I still can't figure out what you're trying to say.

Tell that to the dudes writing the instruction manuals then.

[Cutty72]

Originally Posted by fasternyou929

I must've read this 10x and I still can't figure out what you're trying to say.

I believe he's saying he just rolls down a window. The air is full of dirt, and it's hot outside in his local at this time of year.

[Homeslice]

I thought he was saying he farts a lot

[fasternyou929]

Originally Posted by Particle Man

Tell that to the dudes writing the instruction manuals then.

If I ever see a manual written that way, I will. You actually made me crack open the owners manual for my truck, but all it says is to use recirculate for quick cooling or in dusty/high exhaust fume areas. It makes no mention of using recirculate with the windows down.

[Particle Man]

Originally Posted by fasternyou929

If I ever see a manual written that way, I will. You actually made me crack open the owners manual for my truck, but all it says is to use recirculate for quick cooling or in dusty/high exhaust fume areas. It makes no mention of using recirculate with the windows down.

The manuals for my Grand Prix, Achieva, Explorer, and Mountaineer (not sure about the Kia or the Subaru I'll have to check) all said crack the window slightly for the first few minutes of operation to allow the MAX A/C to push the hot air out and then close the windows to allow the system to dehumidify the air and recirculate. It doesn't say "windows down" (nor did I say that).

I don't know if it's right or not (and I honestly don't care )

[RedRider2k2]

Originally Posted by fasternyou929

It does more than recirculate the air (most systems have a separate control for that). Max A/C also runs the compressor and auxiliary engine cooling fan at a 100% duty cycle. Normal A/C runs both intermittently, you can probably hear/feel it when the A/C compressor clutch cycles, particularly if you're sitting idle.

I know this is an old ass thread but...

I've service/repaired a lot of AC systems and I've never seen one like this. Running the compressor 100% will just flood/freeze up the Evaporator.

[101lifts2]

Originally Posted by RedRider2k2

I know this is an old ass thread but...

I've service/repaired a lot of AC systems and I've never seen one like this. Running the compressor 100% will just flood/freeze up the Evaporator.

Yes, that is because he doesn't know wtf he is talking about.

Max A/C is for cabin air recirculation only. Notice when you have a Recirc button, you don't have a Max A/C setting. When you have a Max A/C setting, you don't have a recirc button.

Most compressors nowadays don't cycle anyway. They are either ON or OFF. The pressure control is done with valving in the compressor itself. This is not to say that the engine controller cannot turn OFF the compressore if the high side pressure becomes too high or too low or if you in a W.O.T. scenario.