It's my understanding that freon (like methane or propane) is odorless. In
the real world, we use odorizing chemicals so we can smell them (mixed in
with the natural gas or propane).

In the case of "smelling freon" that would be the lubricating oil you smell.

--

Christopher A. Young
Do good work.
It's longer in the short run
but shorter in the long run.
..
..


"Pop" wrote in message
...
That's a pretty well written description. IFF the tech was
reliable, then you have a leak in the walls, it seems funny he
wasn't able to detect it anywhere. If it's leaking into the
walls, there has to be an exit point for it and it'll be
detectable there.

If it's actually "freon" as you said, that has a pretty good odor
and at the loss rate you indicate, you should be able to smell it
yoruself, even.

How does he/you know, if the detector was functioning and being
used, correctly?

Also, if this is in the attic, I don't know why a hole would have
to be made in a wall. It should be pretty easy to pull out the
old and fish in a new pipe. IMO at least; no expert here, just
an avid diy'er.

Just my two cents; I know it isn't my money, but if I were you I
think I'd try another service and if they came up with the same
results, consider replacing what needs to be done. It's still
cheaper than paying housecalls for freon every two weeks in your
climate.

"user" wrote in message
...
: Hi Folks..
:
: I'm having an issue with one of the AC systems in my house..
For some
: reasons only the upstairs unit seems to be leaking freeon..