WTF does Max A/C do?

[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.

[Particle Man]

Originally Posted by 101lifts2

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.

My Kia has both a max and a recirc setting. I can recircate the air on every setting. When "Max" is selected, I can't override the recirculate feature.

The Subaru only has the recirc button and no "Max" setting.

[Rangerscott]

Originally Posted by Particle Man

My Kia has both a max and a recirc setting. I can recircate the air on every setting. When "Max" is selected, I can't override the recirculate feature.

The Subaru only has the recirc button and no "Max" setting.

Same with our work '04 F-150. The only thing is max a/c just blows through the top vents. I always have it set to top/bottom and hit the recurculate button.

[azoomm]

Originally Posted by 101lifts2

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.

I have both MAX and re-circ on my 1-Series. Actually, I have MAX and three settings to recirculate air. If I select MAX it drops the selected temp to 60 and does a full lockout to recirculate the air. The MAX selection also locks out the passenger's ability to select their own temp. I'm still trying to figure out the three settings on re-circulation. I might have to RTFM

[fasternyou929]

Originally Posted by 101lifts2

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.

I couldn't have come up with a better rebuttal. Thanks for talking out your ass and saving me the time.

[101lifts2]

Originally Posted by fasternyou929

I couldn't have come up with a better rebuttal. Thanks for talking out your ass and saving me the time.

Dude I'm a service engineer for a car company...and have worked with car companies since I was 22. If I know anything in this world...it's cars. You guys just guess at shit...or try to analize things using general common sense. Your original statement that the compressor cycles because of "Max A/C" or "Normal" just is not true.

Those that have Max AC and a Recirc button is simply for air venting direction (Max AC) and then % outside air using the Recirc button.

[RedRider2k2]

Originally Posted by 101lifts2

Most compressors nowadays don't cycle anyway. They are either ON or OFF. The pressure control is done with valving in the compressor itself.

I've heard about these but never worked on any yet. Are they similar to a Sanden style compressor but with a variable Swash Plate?

[Particle Man]

Originally Posted by RedRider2k2

I've heard about these but never worked on any yet. Are they similar to a Sanden style compressor but with a variable Swash Plate?

Nah, it is like an automatic transmission that also does bellybutton piercings

[101lifts2]

Originally Posted by RedRider2k2

I've heard about these but never worked on any yet. Are they similar to a Sanden style compressor but with a variable Swash Plate?

Sanden style sounds right. The constant On/Off is noisy and wears out the magnetic clutch. I'm not sure if it's any cheaper, though.

[Particle Man]