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There are some common
situations that cause bad smells to come from A/C ducts.
These include:
-- Leafy build up often in the
intake, but also along the duct's run. Leaves can rot,
decay, and create a smell.
-- Drain hose clog. This
causes water to back up and collect in the lower areas of
the ductwork where mildew can develop.
-- Small rodents. It has been
reported that mice or similar creatures crawl into the A/C
system. A/C systems are similar to the underground
passageways that rodents naturally build and prefer. They
may die or, at least, leave droppings in the duct system.
Removal & Elimination:
Easiest will be to clear a
clogged drain hose. Check for this first and take
appropriate action. Sometimes an additional few inch length
of hose added to the end of the car's drain hose and routed
properly will prevent a reoccurrence.
If it is not a clogged drain
hose, attempt to isolate the specific duct or ducts that are
worse. This may provide a direction to pursue.
Disassemble the ductwork in
the worst area searching for any problem listed above.
If a build up of leafy
material or animal droppings is found, clean the ductwork
thoroughly leaving no residue. Use various cleaners until no
residue remains.
Be certain to thoroughly clean
the junctures between the duct's different sections.
Once clean and odor-free,
discover how the problem originated and take steps to
eliminate and prevent a recurrence. |