Honestly, I really don’t know why this happens. If I keep my AC on low, the outside of my evaporator box on the inside will condensate water and drip into the floorboard. It drips pretty well onto the ground, but for some reason the box itself condensates and drips, but only on low speeds. If it’s at max, it doesn’t really condensate and is pretty dry. But at any other speed, it will eventually start dripping pretty heavily inside the cabin, as well as outside through the drain tube.

Is there some kind of seal that might’ve failed? I don’t really know because it’s not like the box itself is leaking, it’s just getting so cold that it condensates on the box under the passenger side dash.

You can check to see if the drain is plugged because if it has to much water in the evaporator box it will transfer the cold to the out side of the box . you can take a air hose and just blow air into the drain and it was plugged it will start to drain .

Agreed

Well, I want to clean the drain hose, but I can’t find it.

I found what looks like the beginning of the hose at the front of the box under the passenger side dash, but I can’t find the rest of the hose.

Also, is it supposed to drain out of the frame rail? It drains out right behind the lower control arm on the frame rail

Here ya go.

Leave the hose connected and just squeeze the snake mouth from the sides.

Well, it looks like my drain tube ends where it comes out of the firewall.

I tired to take some pictures, but they didn’t come out very good




I circled where the drain tube stops, and you can see the right side of the bell housing by my hand.

What should I do about this? If it really is clogged, it seems like the evaporator box itself might be clogged if there really isn’t much drain tube

Poke through that hole with a zip tie.

Well, this was where my drain tube is supposed to be:




I’m confused now.

Did it drain out after that?

Nope. Nothing came out. All I saw was some yellow insulation in that hole

That's not good.

This just doesn’t make sense. The evaporator drains, but it comes out of the inside of the frame rail. I guess i’ll try and trace it through the inside of the cabin and see where it comes out

So this is what your HVAC unit looks like.
Bellow the evaporator lines, at the bottom you see something that your "drain hose" hooks onto to get the condensate out of the HVAC box.



And on your firewall you see the larger circular hole that it passes the hose through.



Thats all there is to it on your Jeep.

Gotta be more complex than that!!!