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Old 05-24-2010, 12:13 PM   #1
Restrorob
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AC Drain ?

One of the guy's here at work has a 89 C2500 and asked me where the AC evaporator box drain is, He said he's looked all over for one but can't find it. I haven't a clue and not going to craw around under it looking.

Any of you folks know where they hid it ?

Thanks
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Old 05-24-2010, 12:16 PM   #2
ChevLoRay
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Re: AC Drain ?

I saved this pic of an underdash layout for HVAC. See if it helps.
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Old 05-24-2010, 01:07 PM   #3
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Re: AC Drain ?

Here you go. Is water getting in the cab? If so heres a TSB on how to fix it.


Owners of some 1988-1992 C/K vehicles may comment that water leaks from the A/C evaporator drain into the passenger compartment. This condition can be encountered during A/C operation especially on days with high humidity. Under normal operation, water gathers on the bottom of the evaporator case and drains out into the engine compartment. However, in some instances, air flowing through the engine compartment can blow the water back toward the opening in the cowl for the evaporator drain. This action may allow the water to seep down into the passenger compartment. In order to repair this condition, a drain tube (P/N 22542866) should be installed on the end of the evaporator drain. This will allow the water to drain down away from the evaporator drain opening.
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Old 05-24-2010, 01:35 PM   #4
ChevLoRay
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Re: AC Drain ?

Thanks for the schematic. I saw that the pic I had didn't show it but thought it might be of some good for someone who needed it, just in case it helped them see what doesn't necessarily show.
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Old 05-24-2010, 02:22 PM   #5
TennesseeZ
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Re: AC Drain ?

Here's a pic IndyAnne posted of hers:

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Last edited by TennesseeZ; 05-24-2010 at 02:26 PM.
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Old 05-24-2010, 06:09 PM   #6
Restrorob
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Re: AC Drain ?

Quote:
Originally Posted by clinebarger View Post
Is water getting in the cab?

Yep, That's what is happening.

Thanks everyone, This place !!!!
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74 Chevy C10 Long Box,
Body Off Restoration In Progress

The primary function of an Engineer is to make it difficult for the Fabricator and impossible for the Mechanic.


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Old 05-24-2010, 11:27 PM   #7
ChevLoRay
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Re: AC Drain ?

Any questions?
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Old 11-22-2017, 08:08 AM   #8
Desy180
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Re: AC Drain ?

Thanks for the info. Good review!
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