Where is the A/C evaporator drain line located?

MORGAN8173

MEMBER
2011 FORD ESCAPE
2.5L
4 CYL
2WD
AUTOMATIC
280,000 MILES

I’m trying to locate the drain line access connections for the A/C evaporator. I’ve already verified that the firewall drain line tube is cleared but there’s still water sloshing around in it and it’s still not dripping under the car. It’s literally forming condensation droplets on the inside vents when it’s run for awhile. I’ve also used 2 cans of AC Pro Foam Odor cleaner trying to dissolve whatever it is. I’ve blown compressed air into the drain.

Also my floor in the backseat Passos wet.

2 Replies

KASEKENNY

MECHANIC
18,907 POSTS

Is the evaporator freezing? Clearly the evaporator does sweat and that will run out the drain but if you have enough water that you are hearing it move then I suspect you have a greater issue then just a drainage issue.

If the drain line is clear then this should handle all water that collects in the housing.

I would suggest we start with checking the pressure on the system and make sure that we don't have a freezing and thawing of the evaporator.

Here is a guide that will help with this:

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

When you verified the firewall drain is clear, did you find that there is water coming out at all?

Basically if the water that you are hearing is in the housing then it should come out of this drain so I am thinking it is plugged inside the housing.

However, if it is not then we need to go back to the pressures.

If we solve the possible ice issue then the drain will be able to handle any normal condensation.

Below is a chart that will help with pressures so let's run through this and go from there.

Thanks

Image (Click to make bigger)

SPONSORED LINKS

Was this

answer

helpful?

Yes

No

Wednesday, August 11th, 2021 AT 12:35 PM

MASTER ASE TECH

MEMBER
82 POSTS

Hi, I'm Dan. The drain for the A/C on that car is very short and goes right through the firewall. However, there is a Technical Bulletin from Ford about rainwater getting into the A/C system from the cowl area at the base of the windshield. Ford wants you to remove the cowl, and add liberal amounts of silicone sealer in this area after removing the foam. I've attached Ford TSB # TSB 14-0157 to this reply.

I've also attached a picture of the A/C evaporator case (upside down).

And the procedure to remove the cowl.
Let us know what you find.

Images (Click to make bigger)