How do I reset the a/c on my 93 quest keeps blinking and only blows air on my feet

Check to make sure the motors are moving hot to cold. The blinking control panel means it has self diag mode. Google how to get the heater control panel to go into self diag mode and when you get codes goggle them too . Prob bad control panel switch or unit

Usually a problem with one of the blend doors under the dash.

Yes it's very true, change the front one and you will not have any further problem

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I believe they only stopped using freon last year in vehicle ac's. That is what it sounds like is the problem.

for manual system, it's in the plenum box near passenger's feet. look up. 2 screws hold it in.

If EATC automatic system, you don't have a resistor, just a white hose in that opening.

go here.

http://groups.yahoo.com/group/villagerquest/

buy cheap from tasacafordparts.com for 2002 mercury villager. same exact van.

you are low on freon. Front needs more freaon for fixed orifice tube system.

http://groups.yahoo.com/group/villagerquest/

A radiator fan is designed to pull air to pull air through the radiator to help cool it, while blowing the air on back across the engine to try to assist once again at keeping the unit running cool as to not over heat.

sounds like a damper door in the front not working properly, these are actuated by the front temp control, the door is operated by either a manual cable, and electric actuator, or vacuum. I hope this helps you zero in on your problem. Merry Christmas

Check out Thermostatic Expantion Valve

i suspect you have a dirty mass air flow sensor. It is in the air cleaner assembly with 2 anti-tamper screws on it. remove the MAF sensor and clean with carburator cleaner and a toothbrush very gently. the wires are very fragile. The MAF tells the computer how much air is flowing through the air cleaner to adjust the fuel mixture.
other posibility is TP Sensor (throttle position).