2000 S80 2000,000 miles, Air conditioner does not cool, compressor is engaged when called for and does not cycle. I began hearing a hissing noise, like the refrigerant moving through the evaporator in the dash, and it has gotten progressively louder. I have not taken it in to an expensive service fa...

Gentlemen, just finished replacing the Heater Core on a 2000 S80. It was a trying patient endeavor, but thanks to all of the above tips and tricks with regard to heater hose removal and those F'n clips it was worth the time spent on the project vice Dealership costs.
Thanks again for the guidance.