MG Car Repair: heater, cold air

Question
Hello, For some reason i cant get the heat to work in my 68' mg. Any solutions would be a lot of help. Thanks!

Answer
Can't get the heat to work. Meaning you can't get the fan to run? Or you can get the fan on but it blows cold air? Or you mean the fan runs but nothing comes out the vents? Each is a different problem so you will have to be more explicit for me to try to help.
Howard