Re: A/C stuck on defrost.
yeah, the vent flaps default to defrost when they have no vacuum to hold them open.
looking for a fix can be a pita, but I'd start looking at the lines under the dash, if you're lucky, maybe a connector came undone.
the vacuum lines are a bunch of bright colors, and are grouped together down there. They're rubbery, and they end in junction type connectors at various locations along the firewall, or at the canisters that operate the vent movement. the connectors are spread throughout the lines, for various t's and what not.
2002 Ranger FX4
4.0L SOHC, 5R55E Auto, 4.10 8.8 Torsen, 31x10.5/15 BFG ATs