MAX AC stops working

[Magus2727]

So its been hot the last few days and I have been running the AC and usualy it just me but I was driving around with people in the back so I was trying to cool the whole jeep down.

The MAX AC would stop putting out cold air after a few min of use, but the regular AC would be fine at max fan. What normaly causes this?

I have had it happen once or twice on other vehicels but that was normaly after a few hours of MAX AC, and seamed more of a default return to Normal AC since the other cars have all been more "auto" and had push buttons and not a manual control leaver.

I recharged the system and the pressure is in the green. doesent it stop working on MAX when the AC pump heats up to much or something? but why does that explain why it started blasting cold air the moment i moved it back to regular AC?

Any help would be good. Thanks

 

[Ecomike]

That is new one for me. PM 8mud, and see if he has any ideas.

This question should be in the OEM section, not the Modified section.

Only idea I can come up with is the slider switch box assy., between max and normal may be dirty, or corroded. I have not taken one of them apart before, so I am not sure exactly what goes on inside them. They are a complex mulitport vacuum valve and multiple input / output electric switch with one slide control across the top.

The bottom slider is a mechanical cable that moves a damper door, and the left switch is just a multi speed fan switch.