I Turn The Switch To Put The Air Conditioning/heat On In My 94 Civic But There Is Not Air Being Blown Out.?

What is the problem, I’m not car savvy and I’m guessing its a quick fix. Is it? If so what should I do?

Is It Possible To Program A Heating/cooling Unit To Switch From Cool To Heat?

My 12 month old’s bedroom is on the second floor of our house and there is a separate unit on that floor. I want the unit to switch from cool to heat when the temperature reaches a certain degree and vice versa. Is this possible?