https://pligg.samweber.biz/story.php?title=hvac-technology-spotlight-whats-new-and-exciting-in-hvac The working fluid, in its gaseous state, is pressurized and circulated through the system by a compressor. I live in Southern Cal. Dirty or blocked evaporator coil. New duct work as well. Sun, 03 Feb 2019 05:27:31 UTC en