A ceiling stain under the attic unit in Breakaway Trails: which of the four drain parts gave up
An air conditioner in Ormond Beach pulls gallons of water out of the air every summer day. Four parts carry it away. When one fails, where you live tells us which one.
The four parts that carry the water
Every air conditioner has a primary drain line from the indoor coil’s pan to the outdoors, a trap in that line that keeps air from being sucked back through it, a float switch that shuts the system off if the pan fills, and, on any unit above a living space, a secondary pan with its own drain or switch. An Ormond Beach system in August is sending several gallons a day through that chain. When water appears where it should not, one of the four has failed, and the type of house narrows it down fast.
The attic unit in a 1990s two-story
Breakaway Trails, Ormond Lakes, the newer sections of Tymber Creek: air handler on a platform in the attic, ducts running across the trusses, and a ceiling below that shows every drop. A brown ring on the upstairs hallway ceiling is the classic call.
What usually failed. The primary line clogged with algae, the pan filled, and either there was no float switch or it had been bypassed years ago by someone tired of the system shutting off. The secondary pan, if present, caught some of it until its own small drain blocked. The water went through the ceiling.
What to do first. Cooling off at the thermostat. Fan can stay on. Put a bucket under the drip, and if you can safely reach the attic, do not try to move the unit or the pan.
What we do. Vacuum the line clear from the outdoor end, pull and clean the trap, flush the pan, test the float switch or install one that works, clear the secondary pan drain, and check the cabinet seam where water escapes before reaching either pan. Then we run the system and watch the water leave the house.
The garage unit in a mid-century ranch
Ormond Terrace, Rio Vista, Ellinor Village, the older sections of The Trails: air handler on the garage floor or a short stand, drain line through the wall to the side yard. The sign is a puddle on the garage floor, or a system that shuts off after rain and restarts an hour later.
What usually failed. The trap, slimed shut, or a line that was run with a low spot where water sits and grows algae. On homes that took water in Ian or Milton, the drain line’s exit is often buried under re-graded soil or mulch and cannot drain at all. The float switch, if it exists, has been doing its job and cutting the system; that is the “stops after rain” pattern.
What to do first. Cooling off. A wet-dry vacuum on the outdoor end of the drain line, if you own one and can find the line’s exit, often clears the clog on the spot.
What we do. Clear and treat the line, replace a trap that cannot be cleaned, regrade the exit above the soil, fit a float switch, and, on a unit sitting on a slab that flooded, talk about a taller stand.
The closet unit in a beachside condo
Ormond-by-the-Sea and the A1A condos: air handler in a hall closet, drain line that often ties into a building stack or runs a long way to the outside, downstairs neighbor below.
What usually failed. A shared or long drain that backed up, or a float switch that was never installed because the unit predates the requirement. Salt air corrodes the pan and cabinet faster on the beach side, so a rusted-through pan is also on the list here, which it rarely is on the mainland.
What to do first. Cooling off, towels down, and a word to the neighbor below before the ceiling tells them.
What we do. Clear the line to wherever it drains, confirm the building stack is not the blockage, inspect the pan for corrosion, and install a float switch that shuts the unit off before the next event reaches someone else’s ceiling.
Why September is the month
The line has been wet since March. The dew point has been in the 70s since June. By September the system is removing its maximum water of the year through a line that has had six months to grow biofilm. Nearly every water call we take in Ormond Beach between August and October is a drain that was slowly closing all summer and finally met a week of rain.
Keeping it from happening again
A drain line cleared and treated at the spring maintenance visit, a float switch on every unit, a secondary pan with its own switch on every attic unit, and a drain exit that actually drains. Those four items are on every maintenance visit we do in this town, because a hundred-dollar switch is cheaper than a ceiling. Call 866-266-5709; the truck comes from our Palm Coast headquarters with the vacuum and the switches aboard.
Water-leak questions from Ormond Beach
Can I pour bleach or vinegar down the drain line myself?
A cup of white vinegar monthly in summer is reasonable preventive care if the line has an access tee. Bleach eats the drain pan and the fittings over time; skip it. Neither will clear a line that is already blocked solid.
My attic unit has a second pan under it. Why did the ceiling still stain?
Either the secondary pan’s own drain was blocked, or it had no float switch and overflowed in turn, or the water escaped at the cabinet seam before it reached the pan. We find all three in Ormond Beach attics.
Why does the drain clog every September?
The line has been wet and warm since March, and algae and biofilm have had six months to grow. September’s rain and dew points push the system to its highest water output of the year, and the half-blocked line finally cannot keep up.
The water is coming from the outdoor unit, not inside. Is that a problem?
Usually not in summer; a sweating refrigerant line and the end of the condensate drain both put water outside. In winter a heat pump’s defrost cycle sheds water from the outdoor coil. A puddle inside is the one that matters.
Water where it shouldn't be?
Turn the cooling off, catch what you can, and call. We clear it and find out why.