blowers and heater woes in 87 300D

My 87 300D has had its climate control unit in the console replaced within the past year. I can get no air out of the bottom of the dash (the tranny was just replaced and they did some work to the vacuum system in November). The blower does not come on at all often; sometimes several minutes after its been turned on. And, lately I've been noticing a vibration I can feel through the steering wheel and a whining noise when the blower is turned on.

Any comments on this condition?

Carl