Air conditioner is a 7 year old Sunpentown WA-1210E. The tank fills
(and turns itself off as it should) in only 4 hours. I can only drain
out half of its 3 pint capacity. It cools fine however. It's never
required draining before, except as reccomended at the end of summer.
I've googled for tips and have tried adding a small amount of bleach
to through the drain plug hole after draining but problem repeats.
Thanks in advance for a solution.
I'll try to clarify. My portable AC normally recycles 60 to 70% of
the water that would fall into the tank to improve cooling efficiency
and eliminate the need to empty the tank every x number of hours that
is required on cheaper models without the self-evaporative feature.
This is info is from the Sunpentown website. Not as good as a dual
hose unit but it does a good job of it when working as it should.
Adding bleach to a freshly emptied water tank is supposed to free up
any gunk if there is a clog. Right now it has to be emptied every 4
hours which is not normal.
l agree to that, but why over 7 years of summer use has manually
emptying the drain tank only become an issue this year?
An easy fix would be to remove the drain plug at the bottom rear of
the unit and attach the provided plastic tubing and exit it outside
but for my application that's not practical.
I doubt bleach is capable of clearing all clogs or maybe even most
or any clogs. It's good for sanitization and killing mold or other
growth that could contribute to a clog, but once one is there I
doubt it's going to have a high success rate clearing it.
It's also not clear where this drain hole is in relation to everything
else. If I understand the whole system correctly, it sounds like
the water is recirculated and allowed to evaporate inside the
unit. If that is the case, it would sound like the clog would
be somewhere inside that is preventing the water from getting
to where it needs to go to evaporate. Have you looked for
online service diagrams that might show how it's put together
and actually implemented?
Aside from that, I'm not to sure about the desirability of putting
the humidity back in the air. I can turn my central AC on and
you feel a very noticeable increase in comfort within less than
a half hour, even though the temp hasn't even dropped one deg
on the thermostat yet. That's due to taking the humidity out.
the thermostat yet.
The bleach kills the mold that form a blockage. If, however, the blockage is
already there it should be physically removed (poke with a wire, blow it out
with a huff-and-puff or water jet).
If draining to the outside is impractical, you COULD drain to a bigger
container or, best case, a sink or toilet.
I often use a shop vac to clear drains on AC and refrigeration units.
You can use a water and bleach mix to flush things out and clear the
passages with the shop vac. I often have to tape a smaller diameter
piece of hose to the vacuum hose to get into the small spaces in a
unit like you have. You can also take the unit outside and flush it
out with water from a garden hose but be careful of a power stream
from the hose nozzle which can bend up any aluminum fins it may hit.
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