Tip on Drain Lines
https://juliushmim588.trexgame.net/warm-air-on-the-first-hot-day-means-north-fort-worth-ac-repair-and-a-call-to-comfort-experts
Tip on Drain Lines Tip for anyone with an attic air handler: check the secondary drain pan a couple of times each summer. Ours had standing water I never would have spotted otherwise