a/c dont blow hard on 1997 Buick Park Avenue

when i have it on heat the blower motor blows hard but when i go to a/c it hardly blows anything even with the hard turned all the way up

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1 answer 2 comments
You could have a blower motor resistor failure. Have the circuit inspected.
not resistor if it works on heat
True;

It could be that the door that directs air flow could be a problem, or it could also be that the evaporator ices up for some reason preventing air flow with the AC on cold.