I am having my outside central air conditioner moved around the corner. In order to save a bunch on the labor costs my air conditioner man will allow me to run the new copper lines and low voltage control wire. He will do all of the connecting and charging of the system. I have to run a 3/8" line and a 3/4" line both 30' Is it a special type of copper line or can I use the copper line they have in rolls at the big box? If not, what do I ask for and where do I get it? Also, do you insulate both of the copper lines or just one of them?

Hi, I have a heat pump in my house in GA that is not cooling when set to cool or heating when set to heat. I'll post the brand/model in a little while (I'm at work right now). Inside fan works, coils/fins are clean, filter is clean. Air blows out of register just like always. Outside unit: Fan turns on and I can hear what I believe is the "humming" of the current draw of the compressor. I could be wrong and it could be drawing current, but not starting, I guess. The breakers inside the house and next to the outside unit are not tripping. Thermostat works. Now, if I push the high pressure switch (red "reset" button near the outside lines, the outside fan will stop. If I let go, it starts again. I have no experience with AC units or heat pumps, but I am an electrical engineer, very mechanically inclined and experienced do-it-yourselfer. If you explain it, I will understand it and be able to do it (given the parts and tools). Any advice on what to check/test and how would be appreciated. Thanks. :thumbup: