92 Park Avenue, Blower problem

There is very little air flow coming out of the vents when running the heater, air cond, etc. The blower motor sounds like it is working when you change the fan speeds. Any suggestions?

Check where the air is blowing out. See if the air is blowing out the defrost vents when you have it set for vents.

The vent system works off of engine vacuum. There is rubber hose that goes to the engine firewall at a point below and to the left of the master cyclinder. The AC/HEATER unit has a small hose that connects to that point too. Usually, the hose dry rots creating a loss of vacuum.