Hi all,
still helping a friend get his house in shape... cleaned the A-coil today. Lots of crap came out! Anyway, the housing above the furnace for the indoor portion of the AC looks like it had about 1/2" or so of tarry stuff poured into it after it was installed, but some of it has broken up and come loose since then. So there's standing water in there now, because the drain tube (which is clogged, but that's another issue that I think I can deal with) is at the level of this tar stuff, which now has chunks missing.
What is said stuff, and where can we get more to make it as it should be?
thanks
nate