My home air conditioning unit is leaking water - The overflow drip pan is fine, but it just has a steady stream of water coming from the PVC pipe outside. The drip pan is not clogged it is just pouring water. It was freezing a few weeks ago and we had someone come out and recharge the unit. He now says it needs to be cleaned out, another $125. I was just wondering if this seemed correct or if I was been taken for a ride??