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73-87 Chevy _ GMC Trucks => Interior & Equipment => Heating, Ventilation & Air Conditioning (HVAC) => Topic started by: truxson on February 15, 2020, 11:08:00 am

Title: 1976 c10 A/C question.....Another one!
Post by: truxson on February 15, 2020, 11:08:00 am

Folks I need some more help....

First, thanks to all those that have helped me in the past.  This is the only forum where I can get correct, actionable information!

So...I had a problem with the floor rusting out in my truck.  After removing carpet, repairing the sheet metal, coating and whatever, I thought I had the problem 'cured'.  I expected external moisture was the problem.  But it isn't...

The A/C condensation is running down on the inside, instead of the outside.  I couldn't tell this when the carpet was installed and in fact I didn't even notice it. 

Can anyone give me some advice on re-directing the condensation from the evaporator core outside, instead of running in on the floor?

Thanks, david. (truxson)

Title: Re: 1976 c10 A/C question.....Another one!
Post by: VileZambonie on February 15, 2020, 12:44:14 pm

The drain is probably clogged. Look at the evaporator case in the engine compartment directly below the evaporator. There is a drain hole, blow it out with compressed air, otherwise, take everything apart and clean it.

Title: Re: 1976 c10 A/C question.....Another one!
Post by: truxson on February 15, 2020, 01:34:00 pm

Thanks.  I'll check that out. 

Regards, david.