relatively seasoned DIY'er here. Please forgive me if i don't use the correct HVAC terminology
Original Trane 1995 HVAC. XE 80 gas furnace with an encased coil airhandler connected to it. located in my attic. XE1000 outdoor unit.
My problem is with the condensate lines. the air handler is horizontally mounted w/ 2 condensate lines. the primary has a p-trap. both the primary and secondary lines are mounted very close to each other at the same level. at the opposite end from the condensate lines, the air handler is leaking.
The primary and secondary lines both terminate outside of my house. the primary isn't draining at all. I thought it may be clogged and hooked up a 6hp wet/dry vac and let it run for 5 minutes. nothing. i turned the vac back on and got into the attic and can hear air traveling through the lines no problem. i even drilled a small hole into the top of the primary line and fished around in it and found no blockage.
the secondary line is draining of course, but it doesn't seem to be able to keep up with the amount of condensate.
The air handler appears to be sealed, without an access panel that i can see at least. if my primary line isn't clogged, why isn't it draining?? could the coils themselves be so dirty that they are redirecting condensate flow away from the primary pan? could the air handler have shifted so that condensate isn't flowing towards the drain lines?
on a side note, when the AC is on, i feel pressurized cool air coming out of the primary condensate line.
Thank you for any help! i will try to get some pictures of my setup as well..