Auto Air Conditioning & Heater Repair: 95 chev blazer, chev blazer, vacuum line

Question
No ac or air coming from vents on dash,only from defroster outlet and floor outlet,no matter what selection is made on the selecter knob.What componet has failed ?

Answer
This problem is usually always a vacuum loss to the dash components.

Look in the engine compartment for a small black plastic hose that goes thru the firewall and back track it in the engine compartment where you will find it either disconnected and or split. Check the vacuum line real careful as there maybe a vacuum canister hidden up under the front bumper area and can only be seen by laying on the ground and looking upwards.