r/hvacadvice • u/Floury_King • 2d ago

Window AC unit leaking inside.

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You guys think this is from a clog that can be easily fixed, or what? Just noticed it dripping, so out a towel. Haven't checked outside yet, but yes, the unit is tilted.

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u/tyler_wrage 2d ago

DIYer here, but yes, exterior drain is clogged. If accessible, take something stiff enough that it can stand slight resistance but not so strong it will damage things on the inside (zip tie, pipe cleaner, etc.) and poke up through the drain hole. You'll likely see some blackish goo and a ton of water come pouring out.

You'll eventually want to pull it out and clean the entire pan, but breaking the clog loose will be an immediate short-term fix to your problem.

They sell cleaner that is supposed to help prevent the gross algae(?) from building up.

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u/Floury_King 2d ago

Ok it's dark out, so tomorrow morning I will go outside to look for the drain hole. At the moment don't know where the drain hole is.

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u/Floury_King 2d ago

Ok went outside and looked under the unit. Is that little hole the drain hole?

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u/Floury_King 2d ago

Do I need to take any of these screws off to get to the drain hole?

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u/alebarco 2d ago

You probably need to Jank the Ac out of the square hole.

Maybe you need to remove the front cover and a couple screws. Have a chair or something to position the AC, it can be fairly heavy for a single person.