If your waterer is freezing, then it's too cold for your chicks. You keep the waterer in the heat lamp's heated area with the chicks. (Along with the food.) If it's too far away and too cold, the chicks will not go to the waterer to get a drink. Again, have a thermometer on the floor to take the...
I live in Maine, and I like to get them April 1st if possible. So I'm typically getting them the first of April. I used to do some in the Spring and the rest in the Fall, but when butchering time came, I couldn't take the coldness, so I do Spring only now if I can.
Raise them on the heat lamp...