AC drain line cleaning and repair for New Orleans homes
An air conditioner here can pull several gallons of water out of the air on a humid day. When the drain that carries it away clogs, that water ends up in the pan, on the ceiling or on the floor. We clear it, fix it and stop it from happening again.
Answered 24/7Mid-City service officeSlidell head officeEvery major brand
A clogged AC condensate drain in New Orleans usually shows up as water around the air handler, a stain on the ceiling below an attic unit, or a system that shuts off when the float switch trips. Clearing the line, cleaning the pan and treating it against algae fixes most cases; a cracked pan or a failed switch is replaced.
Signs of a clogged or failing drain
- Water on the floor around the air handler
- Stain spreading on the ceiling below the attic unit
- AC off with a blank thermostat
- Standing water in the drain pan
- Musty smell from the vents
- No water dripping from the outside drain in summer
- Rust on the pan or bottom of the air handler
Why drains clog so often here
Updated September 2026
Every hour the AC runs, it condenses moisture from the air onto the cold coil. That water drips into a pan and runs out through a PVC drain line. In this climate the line carries water most of the year, and the warm, wet pan is ideal for algae and slime that eventually block it.
A float switch is the safety net. When the pan or line backs up, it cuts power to the system before water overflows. A tripped float switch looks like a dead AC, and it is one of the most common calls we get.
How a drain call runs
- 1
Stop the water
System off, water caught, float switch checked.
- 2
Find the blockage
Pan, trap and line inspected end to end.
- 3
Clear and flush
Line vacuumed from outside and flushed from inside.
- 4
Repair
Pan, switch or routing fixed where needed.
- 5
Treat
Pan and line treated to slow algae growth.
- 6
Confirm drainage
System run and water flow checked at the outlet.
Clogged Drain Line
A clogged line stops water leaving the pan, which then fills and trips the float switch or overflows. We clear the line with a vacuum from the outside end, flush it, confirm free flow and treat it to slow algae growth. If the line has sags or no trap, or was run without enough slope, it will clog again, so we correct the routing where needed. Most clogs are cleared in a single visit, and the system is running again before we leave.
Overflow Float Switch
Float switches sit in the pan, the drain line or a secondary pan, and cut the system off when water rises. A system that suddenly stops, with a blank thermostat, often has a tripped switch. We find why it tripped rather than just resetting it. If the switch itself has failed, or there is no switch at all on an attic unit, we install one, because it is inexpensive protection against a ruined ceiling and the drywall and insulation repairs that follow.
Drain Pan Replacement
Metal drain pans rust through, and plastic pans crack with age and attic heat. A leaking primary pan may drip slowly for months before a stain shows on the ceiling. We inspect the pan under the coil and the secondary pan under an attic air handler, and replace the one that has failed. A new pan comes with a float switch and a clear path to the drain, so the fix lasts. We also look for water damage around the unit, since a slow leak often soaks the insulation long before it shows below.
What you can do and when to call
| Task | Homeowner | Technician |
|---|---|---|
| Vinegar through the cleanout | Yes, a few times a year | |
| Check the outside drain drips | Yes | |
| Catch water and switch the AC off | Yes | |
| Clear a full clog | Wet vac at the outlet | Full vacuum and flush |
| Replace pan or float switch | No | Yes |
Drain lines in raised homes
Many older homes in Mid-City and Uptown sit on raised piers with crawl spaces instead of basements, and drain lines from closet or crawl-space air handlers often run under the floor to the outside. Those lines can lose their slope as a house settles, or empty right against the foundation. We check where the line actually ends and make sure the water drains away from the house.
What affects the cost of a drain repair
Most drain calls are short; these are the things that add time.
Clog severity
A partial clog clears faster than a line packed solid.
Line routing
Sags or missing slope may need a section rerouted.
Pan condition
A cracked or rusted pan is replaced.
Float switch
Adding or replacing a switch is a small added part.
Access
Attic and crawl-space units take longer to reach.
Water damage
Ceiling or floor repair is a separate trade.
Questions about Condensate Drain Line Cleaning & Repair in New Orleans
The float switch tripped because the drain clogged. It protects your ceiling. Call to have the line cleared.
If you have a cleanout, a cup of white vinegar helps prevent clogs. A full clog is better vacuumed out.
It can be. Turn the system off, catch the water and call to prevent ceiling damage.
At least once a year here, ideally every spring tune-up.
Yes, especially for an attic air handler. It shuts the system off before the pan overflows.
Poor slope, a missing trap or heavy algae. We fix the cause, not only the clog.
Usually outside near the foundation or into a plumbing drain. We make sure it drains away from the house.
It can cause water damage and, if the switch fails, rust and mold in the air handler.
More cooling repair we handle in New Orleans
Frozen Evaporator Coil Repair
Ice on the refrigerant line, dirty coil cleaning and more.
Frozen Evaporator Coil Repair in New OrleansPost-Storm HVAC Inspection & Restart
Flooded condenser check, power surge damage and more.
Flooded condenser checkWater where it should not be?
Switch the AC off and call. We will clear the drain and find out why it clogged.
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