Water leak?

Does it smell like anti-freeze? If so possibly heater core issues. If not possibly a/c drain stopped up.

No, doesn't really have an anti-freeze smell. Will check out a/c access panel now. Thanks!

This info is for an 05 but may also apply to yours.----You can get to the front drainage hose easy. In the passenger side front area by the floor there is a trim piece (approx 12" X 8") that has to be removed (1 plastic screw 1/4 turn and the screw pops out) This trim piece is by your left foot if you are sitting in the passenger seat(center console) After this piece is removed the drainage hose is right there. Goes from the bottom of the blower box to the firewall. Pull the hose out of the grommet (going through the firewall) Have some "SHAMWOWS" ready (or a container for the water) You will have to "blow" some air into the tube to dislodge the debris that "maybe" in the bottom of the box and let the force of the water to flush it out. mmm a "turkey baster" may work??(never tryed) if you do not have compressed air available.

Just tried this using an air compressor, nothing...I see a drip coming from a small box. Took the panel off the driver's side also and I can see "water" pouring out of the middle and the smell is awful!! Also like sour milk or rotted meat.

Might have an un invited guest that has went to his final resting place in your dash.. Sure hope not tho.

Got it! Used a screw driver & pushed it into the connection into the box. Uninvited HUGE spider & web. Thanks all! a/c working better than ever, no more leaks! Now...to get the stench out! I'll leave that up to the wife! :) Have a happy & safe 4th!

Glad you got it fixed.

Had same problem but had spider & small web in drain hose; blew out with my compressor. Note, as said above, have a large towel ready when you pull line off, about a half pint or more of water will shoot out .

Hey great fix was going crazy in shop all morning with water leak cabin filter had mouse nest in it and drain tube clogged blew it out with air .ac was full of water thanks again never would have figured that out

I unplugged the front AC drain and water came out. WHat about the drain for the rear AC? I looked for it but not finding it. Anyone know where the drain is for the rear AC evaporator on a 2015 SIenna?

I have the same problem. I pulled off the panel on the left side of the passenger seat, removed the drain hose (saw may You Tube videos) but no water came out and the hose through the firewall is clear. I ran the engine with air on full and still no water came out the connector behind the dash... so where is the next place to look?