Central heat/air not turning on?

Last winter we had some issues with our outside unit. Apparently the fan motor went bad, according to the tech who came out. It kept blowing fuses so he disconnected a wire and we ran off of the heat strips for a month or so until it warmed up. He said that we couldn't replace the motor but that his company could install a new system and happily quoted me a price. Well, that heat worked fine and this summer we ran a big window unit in the living room and ceiling fans. It is getting cold again and I went to turn on the heat the other day and nothing happened. No click, no sound no nothing. I replaced the fuses and still nothing. There is a meter box (round) outside next to the unit that illuminates a red light when I put the fuses in and goes off after a few minutes. There are two other lights but they stay unlit. Any ideas on where to start looking before I call out another service tech?