How do you repair an AC/heater vent that isn't letting the air blow through?

What is your question?

1998 Olds LS. AC/heater fan was cutting out, then working again on its own. When it seemed to cut out for good I was advised to replace the blower motor, which I did. But, now it appears the greater problem is a vent that won't open allowing the air to blow into the interior of the car. Is there any way short of removing the dash to get at this problem?