Water leak / air conditioning? - Toyota FJ Cruiser Forum
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#1 (permalink) Old 05-27-2008, 09:43 AM
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Water leak / air conditioning?

I have water running down into the passenger side compartment and the water is pooling under the plastic floorboard. There are two air conditioning lines that you can see from the engine compartment that run through the firewall and into the passenger compartment air/fan unit. I'm thinking that one of the lines is cracked or possiblly the fan unit is cracked? Is water stored anywhere in the unit or is it more likely the AC line?

Anyone else experience anything like this?

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Last edited by gon2srf; 05-27-2008 at 10:01 AM.
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#2 (permalink) Old 05-27-2008, 09:44 AM
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Re: Water leak / air conditioning?

Also the drain line could be stopped or plugged up.

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#3 (permalink) Old 05-27-2008, 09:48 AM
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Re: Water leak / air conditioning?

i think you should try dominics onboard dehumidifier mod

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#4 (permalink) Old 05-27-2008, 10:00 AM
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Re: Water leak / air conditioning?

Quote:
taltyman previously said: View Post
Also the drain line could be stopped or plugged up.
Thanks, I'll check that out.

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#5 (permalink) Old 05-27-2008, 10:00 AM
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Re: Water leak / air conditioning?

Quote:
logan9967 previously said: View Post
i think you should try dominics onboard dehumidifier mod
Ok......?

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#6 (permalink) Old 05-27-2008, 10:02 AM
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Re: Water leak / air conditioning?

Quote:
taltyman previously said: View Post
Also the drain line could be stopped or plugged up.
+1

Water condenses out of the air on the A/C condenser and it is supposed to drain out the bottom of the truck on the passenger side. Your drain must be plugged.

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#7 (permalink) Old 05-27-2008, 11:14 AM
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Re: Water leak / air conditioning?

Quote:
logan9967 previously said: View Post
i think you should try dominics onboard dehumidifier mod


Quote:
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Ok......?
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#8 (permalink) Old 05-27-2008, 11:14 AM
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Re: Water leak / air conditioning?

Ok, I just spent a half hour trying to track down the discharge line to no avail. To me the system looks closed but that is just my initial assessment. Any pros here that can point me to the appropriate location of the discharge line? I am assuming since it is called a discharge line, then it carries the outbound fluids for discharge overboard?

The discharge line is #11 in the illustration.

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Last edited by gon2srf; 05-27-2008 at 11:59 AM.
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#9 (permalink) Old 05-27-2008, 12:11 PM
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Re: Water leak / air conditioning?

I'll take a shot at this one. The drain should be coming out of the evaporator enclosure. The evaporator is the radiator type thing inside the passenger compartment. It's what gets cold and cools the air moving over it. When the air is cooled, water condenses on the outside of the evaporator coils, fins or whatever. This water drips to the bottom of the enclosure and exits through a drain port which should have a hose connected to it that discharges beneath the vehicle on the passenger side. I think the #11 line in the diagram may be a refrigerant line and not a drain line. There should be another diagram showing the evaporator and associated lines.

Once you locate the drain line you might try blowing some air back through it to clear out any blockage. It could be something like a glob of lint maybe. A shop vac might also work either blowing back or with suction. I would like to know for sure that whatever was causing the blockage has been removed. You should be able to crawl under the passenger side and spot the drain line. It will likely just be an open ended rubber tube. Be gentle if you poke anything through that tube to clear it. You don't want to punch a hole in the evaporator or the enclosure. Unlikely, but be careful anyway.

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Last edited by Catt22; 05-27-2008 at 12:17 PM.
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#10 (permalink) Old 05-27-2008, 12:33 PM
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Re: Water leak / air conditioning?

Quote:
Catt22 previously said: View Post
I'll take a shot at this one. The drain should be coming out of the evaporator enclosure. The evaporator is the radiator type thing inside the passenger compartment. It's what gets cold and cools the air moving over it. When the air is cooled, water condenses on the outside of the evaporator coils, fins or whatever. This water drips to the bottom of the enclosure and exits through a drain port which should have a hose connected to it that discharges beneath the vehicle on the passenger side. I think the #11 line in the diagram may be a refrigerant line and not a drain line. There should be another diagram showing the evaporator and associated lines.

Once you locate the drain line you might try blowing some air back through it to clear out any blockage. It could be something like a glob of lint maybe. A shop vac might also work either blowing back or with suction. I would like to know for sure that whatever was causing the blockage has been removed. You should be able to crawl under the passenger side and spot the drain line. It will likely just be an open ended rubber tube. Be gentle if you poke anything through that tube to clear it. You don't want to punch a hole in the evaporator or the enclosure. Unlikely, but be careful anyway.
Thanks very much. Below is the illustration of the evaporator assembly. #10 is the servo drain hose? I did a lot of crawling and didn't spot the hose.


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