I have a small condo, approx 25 yrs old, where in the past year has
developed an intermittent drainage problem. on occasion, the drain pipe
on the airhandler fills and the tray begins to over fill. I have had an
HVAC technicians out three times to fix the issue. once they forced water
thru the piping and we saw the water coming out with sludge buildup.
another time he put some "pills" that I think where to disolve the
buildup. on the third occasion he forced water again but it came out the
other end without any buildup. all three times it seemed the problem was
cleared up but eventually would return in two weeks or so. I have an
electric water heater under the airhandler that I've replaced twice
becasue of the ewater overflowing onto it and frying it.
The condo is on a first floor of a three story bldg. and the three units
on the 1st, 2nd, and 3rd floors share the drainage pipe but the they are
not experiencing problems I am. I am in florida and need to use the AC
most of the time. like I said, the problem is intermittent. about every
two weeks or so this occurs.
Do the following make sense?
1. hook up a shop VAC and suck out waterever may be trapped in there.
2. could and animal be crawling up into the pipe, explaining why this is
3. This sounds crazy but, could this be a vacuum problem where maybe the
pipe is not clogged but instead the pipe is acting in tha same manner as
how a straw retains water when you have you finger covering one end?
Or any troubleshooting ideas?
Thanks in advance for your replies.