A year ago I had my evaporator coil replaced. I recently went into the attic and noticed the secondary condensate drain line had the original plug in it. [ATTACH]94901[/ATTACH] The unit is in the attic and a positive flow system. I've heard/seen mixed reviews on P-traps on it and while I agree that it would help the efficiency of the unit, I'm not ready to pay to re-plumb for that. I know my old unit had the cap open for the secondary that just let it drain into the bottom pan. When I opened the cap on my new unit the hole was completely knocked out and open allowing a lot of airflow out. My old unit had the hole mostly filled with just enough opening for water. It seems like even if I did put a P-trap on the secondary line, it would never fill up or would dry out quickly and be pointless. I don't want to open it up completely in the event that something decides to crawl in it. Are there any partial caps you can put on the mimic what my old unit did to restrict the flow and possibility of things crawling in? I have had my primary on the old unit overflow before so I am interested in getting the secondary opened up but don't want to bug my HVAC guy in the middle of the summer if its something I can easily do. Thanks!

My 11 year old 2-ton Carrier outside AC unit stopped working. A technician checked and said the compressor shorted and needs to be replaced. He also suggested that I get a new unit rather than replacing the compressor because it's an old system, using Freon R-22 and it costs over 2 thousands to replace the compressor and Freon. I agreed to buy a new unit and he offered the following (the inside Air Handler unit also needs to be replaced too since it also uses Freon R-22): Carrier Comfort Series 14SEER 2-ton Heat Pump Model 25HCE424A003 Carrier Comport Series 2-ton Air Handler Model FX4DNF025L00 For $ 5,900 (6,400-500 manufacturer rebate) Lennox Merit Series 2-ton Heat Pump Model 14HPX-024-230 Lennox Merit Seires 2-ton Air Handler, Model CBX25UH-024 For $5,500 (6,000-500 Manufacture rebate) Both come with 10 year warranty on the compressor and parts and 3 year warranty on labor. Thank you for your advice.