WTF does Max A/C do?

[Gas Man]

What? People don't understand if you recirc cold air thru the a/c process again it gets colder?

[OneSickPsycho]

Originally Posted by goof2

With the benefit of time a shit sandwich can be made to sound good. I think I got where you were coming from.

Homeslice, yes, people are too stupid to understand what recirc will accomplish. The "too stupid" factor dictates far too much of car design today.

That is one of the more interesting things I have read recently... and since I have time...

Shit Sandwich
On whole wheat, rye, or a seasame seed bun... Mr Hanky's sandwich spread cannot be beat... The creamy texture combined with nutty chunks and a hint of whole corn kernals make this a great treat for any occassion. Move over JIFF, this ain't yo' momma's peanut butter... this is a special gift from the gods of taste! Savor the thick aroma... it's the kind of food you can smell from miles away. Lick your lips... the smell alone has your mouth watering... Now dig in... it's ok if you like th spoon, we don't mind.

[goof2]

Originally Posted by OneSickPsycho

That is one of the more interesting things I have read recently... and since I have time...

Shit Sandwich
On whole wheat, rye, or a seasame seed bun... Mr Hanky's sandwich spread cannot be beat... The creamy texture combined with nutty chunks and a hint of whole corn kernals make this a great treat for any occassion. Move over JIFF, this ain't yo' momma's peanut butter... this is a special gift from the gods of taste! Savor the thick aroma... it's the kind of food you can smell from miles away. Lick your lips... the smell alone has your mouth watering... Now dig in... it's ok if you like th spoon, we don't mind.

Called out on my hyperbole and proven wrong (very wrong). Nice work.

[Homeslice]

Originally Posted by goof2

My guess, and it may be what Particle man meant as well, is when the A/C is set to get fresh air it is putting new air in the car. The old air has to be forced out somewhere creating higher pressure in the cabin. The fan runs slower because it has to overcome that pressure differential to get the new air in the cabin. When set on recirc it is drawing air from the cabin, cooling it, then replacing it back in the cabin. The fan does not have to work against the increased cabin pressure, its job is easier, and as a result it can run faster. I know in my truck when the A/C is set to get outside air its output increases if I crack the window open.

Hmm, makes sense. All cars have a cabin air exhuast, usually somewhere near the rear fender, but it's covered by a rubber flap so some amount of force is necessary to push air through it.

So then if all Max does is make the air recirc, then why do so many cars have both a Max button AND a recirc button? Do they think people are too stupid to understand what recirc will accomplish?

[Particle Man]

Originally Posted by Homeslice

Hmm, makes sense. All cars have a cabin air exhuast, usually somewhere near the rear fender, but it's covered by a rubber flap so some amount of force is necessary to push air through it.

So then if all Max does is make the air recirc, then why do so many cars have both a Max button AND a recirc button? Do they think people are too stupid to understand what recirc will accomplish?

They have both so you can use the recirculate function even while not using the A/C. Comes in handy near skunks and scumbags.

[Gas Man]

Rider, yours does too. It's the re-circ buton.

[Sean]

it turns the recirc on.

[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.

[Homeslice]

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.

Hmm, I'll have to check that out, thanks

[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.