Looking for advice on getting the AC back up and functioning. I replaced the entire system going in two years ago, but life happened and I haven't been able to finish the job. I got a set of gauges and a vac pump. I could never get it to hold vaccum. When I put it together I left the o-rings that came on the components on and used dielectric grease on all the slip on connections. Tonight I put a little pressure on the low side of the system and can hear a leak on the high pressure connection going to the evaporator. I've got to pull that loose at a minimum. My question is what do I need to do to fix it? New o-ring? Use a different type of grease? I suck at getting those slip on fittings to come off, so I'm not looking forward to the job. Any advice is appreciated.