97 cc drw zf5

I assumed max was recirculation but I see, hear, feel no difference switching to max. And to tell the truth it seems that it may actually be cooler in normal ac mode.

any information anyone can give on this subject?

 

fresh air on norm or recirculate on max

 

^^^^^ +1; pop the hood and look near the passenger side firewall. You'll see a vacuum actuator/motor/whateveryacallit; IIRC that's the one for recirc/max. And it's REAL common for that hard-ish plastic vacuum line to get brittle and break. So inspect that line.

 

Yep. There should be a tiny white vac line coming out of the harness next to the passenger hood hinge. Mine had rotted away a long time ago, so I took a piece of 1/8" fuel/vac line and shoved it over the old white line, and then onto the actuator. I bought a 12" piece and it was the perfect length.

 

x2 on both #3 & #4 replies. I did the repair and now don't have to breath as much road fumes!

 

And you can make the A/C mod
https://www.ford-trucks.com/forums/1...hroud-mod.html (post #4)
This is a good read for you:
https://www.ford-trucks.com/forums/1...at-a-loss.html