Ac drain is blocked cannot locate the drain 1997

best advice is the method i would use to located the orifice tube in the 2000 chevy venture. check the automotive repair book section in your local library. Most libraries have repair manuals on their automotive shelf section. find the a/c manual for your year and model car. make a copy of the page that has the information you need. you will need to make a copy because the library will not let those manuals be checked out. you might want to google for the location of the orifice tube location. I hope this helps.

Usually a blend door problem, either the control or the blend door itself.

Both of those flashers are located on the fuse block under the dash on the drivers side of the van.

under neith on drivers side inside frame rail in front of the fuel tank.

all you gotta do is follow the top radiator hose to motor,it;s where the hose meets the motor.

You can get to it from the inside but it is a lot of work remove the kick pannel to get to the scres to drop the drain pan. Also try removing the glove box you may be able to get to it from there. You may have dropped something in the drain pan threw the vent holes.

located on the engine block

It is the expansion valve. It is in the rear behind the left rear tire. It is gold in color and in route with the ac lines. Guaranteed fix.
Good luck

passengers side under the hood.....by the firewall.....

Could be that the AC drain is clogged and you have water built up in the evap case!