I have radiator coolant leaking into the floorboard in the front seats

What is your question?

The air-conditioner went out about three/four months ago and hasn't been replaced/repaired. I topped off the coolant and the next day there was coolant collected in the front passenger and driver's side floorboard. A friend had a similar problem but a different vehicle... said it might be the heater coil? He said it usually happened when he ran the heater, which is also what happened in my case. Any ideas?