Nissan: Dead critter somewhere in the heating system 95 Pathfinder.

John Matava wrote:
 
There's no way a critter larger than a small bug can get into the
ventilation system. More than likely, it is dirty water trapped inside
the heater air plenum. Water that gets into the plenum is supposed to
drain out through the firewall into the engine compartment and then down
to the ground. It may have debris clogging it preventing the water from
draining and causing the water and particulate formenting into an odious
tea inside the plenum.
You might try cleaning the plenum drain. It's a short black molded hose
with a 90º downward bend sticking out of the firewall on the left side
inside the engine compartment. First, just try squeezing and
manipulating it to loosen the debris. If successful, the water will pour
out. If not, you may have to pull it out of the plenum from inside the
car. Have a pan or something and a big towel to catch the trapped water
so it doesn't spill on your rugs.

Most likely in the intake at the base of the windshield.

John Matava wrote: 

In article <kSYDb.12195$roc.ny>, Bill Schnakenberg <net> wrote: 

Might also try using a coat hanger - putting it up inside the hose and trying
to dislodge any sludge. I had to do this with a Toyota pickup I had once.