Recently I noticed some water on passenger side floor (not antifreeze ). I am suspecting of a clogged A/C drain hose . Any suggestion as to the location of drain hose and how to do the task . Thanks

 

The drain is going to be at the very bottom of the AC plenum, usually directly under the evaporator core. Crawl under there and look for a plastic nipple, sometimes with a 90° elbow/hose, that comes through the firewall. It's usually buried up behind exhaust shields and can be tough to see sometimes.

A shot or two of compressed air with an air nozzle (you may need a nozzle extension, possibly "customized" for this) will usually clean it out. Stay clear or you may get soaked when doing this.

 

projectSH089,


Thank you

 

I wish I did get wet , I would have considered that as a confirmation of "problem solved " . I inserted approx. 10 in long wire ( no dirt built up) , gave few blasts with 80 psi compressed air .


My problem continues . I did a test drive (5 mile) with my manual Heating/Cooling system OFF and did not see any dampness (where passenger side floor meets firewall) . Second test (another 5 mile) with "Heater On" . This time I did see the dampness .


Fluid soaked paper towel did not help much to identify the fluid ( lack of color and smell) , but I have to withdraw my earlier statement about antifreeze , it could be a leaking heater . Radiator level is OK for now . So far the leak occurred while A/C was on and heater was on , I did not see the leak with Heating /Cooling OFF position.


Any suggestion to further diagnose the leak ?


Thanks


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