AC drain line connection?

Why the code stopped requiring a drain line for AC pans is beyond me.

Are you referring to lack of a drain line on the secondary overflow pan that is full of water? Because your comment reads to me like you are stating there is no condensate drain line on the evaporator coil case - I don’t see how that would be possible and you having a functioning HVAC.

If the former (secondary overflow pan that sits below the cased evaporator coil) that is not uncommon - my secondary overflow pan doesn’t have a drain line, It has the emergency shut-down switch (as yours has) to let you know the secondary overflow pan is full of water indicating your primary condensate line is likely blocked-restricted. Otherwise you’d likely never know this until the secondary overflow pan drain line became plugged and overflowed and then you’d have a wet & possibly collapsed ceiling (assuming your evaporator coil is in the attic).

Sorry
No drain line on the secondary overflow pan

It’s leaking where the condensate drain line connects to the evaporator coil case

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No drain line on the secondary overflow pan It’s leaking where the condensate drain line connects to the evaporator coil case

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OK then “normal”, as it’s not necessary b/c you have an emergency “break” float switch to shut the system down with a full secondary overflow pan. Now you know you most likely have a clogged primary condensate drain line that needs to be cleaned.

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Why not both? Mine actually has both an emergency shut-off switch and a drain line from the secondary overflow pan.

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You can certainly have both but to my mind as long as the secondary drain pan is working (draining) if the primary condensate drain is plugged you are not likely going to know this unless you are frequently up in your attic checking, but then you do have the added layer of safety if the secondary pan float-break switch failed.

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have an audible alert when it is draining out of the secondary pan. "Daddy, it sounds like someone is dripping water outside of my room"

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Good idea - I have some water detector monitors as well, but not the human kind. I guess I should go find the box & place them in water heater & HVAC overflow pans.