"Doug Kanter" wrote in message
...
"PipeDown" wrote in message
ink.net...

Sounds like you threw the moth balls outside near the fresh air intake to
your A/C unit.

Fresh air intake??? He's got central air. Do some types have an intake
duct from the outside?


Some might or maybe the A/C is causing a negative pressure in the house
which is drawing contaminated air from outside the window.

Don't know how well the house is sealed or if there any leaks in the system
or if it feeds multiple zones or even it it might really be a heat pump.

Try wafting some smoke from a match near the windows while the A/C is
running or starting and see if there is a draft through the window drawing
the smell in.

I just don't believe that the smell can stick to the inside of an A/C duct
even if it were very dusty. It has to be coming from the source if it is
intensifying at any time.