I just installed a brand new 3 ton goodman Heat Pump system... when the ac turns on , I can here the reverse valve open and the compressor kick on , and here is the question.. The 7/8" copper freon line gets ice cold as it should but only for about 10 seconds and then it goes back to a normal but only slightly cold tempuerature.. and doesn't really blow out cold air.. We have tripple checked freon so not too much or little.. changed T-stat and this thing is driving us nuts... The only thing we haven't changed is the original coper line from outside to inside, though, I would think it isn't clogged... Any ideas?
Thanks
Jon:confused:

Double post. Please delete.