AC drain line clog repair Greenville SC done right the first time
Same-day condensate drain cleaning in Greenville SC for wet floors and musty air
When your AC drain line clogs, water backs up into the pan and soaks ceilings, floors, and ductwork. Our AC drain line clog repair Greenville SC service clears the blockage, flushes the line, and checks the pan and trap so the problem stays gone. We handle condensate drain cleaning in Greenville SC for homes and businesses across Greenville County, usually the same day you call.
AC drain line clog repair Greenville SC explained
AC drain line clog repair Greenville SC is a condensate management service that removes the algae, dust, and biofilm blocking the drain that carries water away from your evaporator coil. Your air handler pulls gallons of moisture out of Greenville's humid air every day. That water drips into a drain pan, runs through a trap, and exits through a PVC line. When slime builds up inside that line, water has nowhere to go. It backs into the pan, trips the float switch, and shuts your system down.
Most Greenville homeowners call us after they spot a wet ceiling stain, a puddle near the air handler, or an AC that quit on the hottest afternoon of the year. If you search for AC drain line clog repair near me Greenville SC, you want someone who can clear the line without tearing apart your closet. We see this most in older homes around Nicholtown and Sans Souci, where original drain lines run long distances under slab or through tight attic chases.
Why clear the drain line now
A clogged condensate line is one of the cheapest AC problems to fix and one of the most expensive to ignore. Here is what you get when we clear it properly.
Stop water damage early
A backed-up drain pan can soak drywall, ruin flooring, and feed mold inside a closet or attic in under 48 hours. Clearing the line restores drainage and lets the pan dry out. We also check the pan for cracks and the float switch for proper operation before we leave.
Restore cooling fast
Many systems shut off when the float switch senses standing water. Clearing the clog often brings cooling back the same visit. If you booked same day AC drain cleaning Greenville SC, we aim to have your system running again within a couple of hours of arrival.
Lower humidity indoors
A draining system removes moisture the way it should, so indoor humidity stays in the 45-55% range instead of climbing. That means fewer musty smells, less strain on your evaporator coil, and a home that feels cooler at the same thermostat setting.
Avoid repeat clogs
We flush the full line, not just the visible end, and we can add drain pan tablets or a scheduled flush to slow algae regrowth. Customers on our annual maintenance plan get a condensate line flush every spring before Greenville's heavy cooling season starts.
What our drain line service looks like
You get a clear sequence, a clean workspace, and a straight answer on what caused the clog. Most drain line calls take 60 to 120 minutes from arrival to test.
Diagnose the backup
We start by confirming the clog is in the drain line and not a frozen evaporator coil or a failed condensate pump. We check the pan, the trap, and the float switch, then test drainage with a small pour. Ten minutes, and we know exactly what we are dealing with.
Protect the area
Wet-vac the standing water out of the pan, lay drop cloths, and set a bucket under the drain termination. If the line exits near a window or soffit, we protect siding and landscaping before we flush. You will not find water trails through the house when we finish.
Clear the clog
We clear the line with a wet-vac at the termination point, then flush from the trap side with low-pressure water or nitrogen. Stubborn algae gets broken up with a drain brush or a line-specific coil. We never use harsh chemicals that can crack older PVC.
Flush and test
After clearing, we run 2 to 3 gallons of water through the line and watch the termination. If it drains in under 30 seconds, the line is clear. We also verify the trap holds a water seal so attic air does not get pulled into the system.
Prevent the next clog
We add drain pan tablets, check the pan slope, and show you where the line exits so you can watch for drips. If you want, we schedule a spring flush so the line is clean before the first 90-degree week in Greenville.
Local experience you can count on
Our technicians work on condensate systems every week across Greenville County, from slab-built ranches near Berea to multi-story homes in the West End. We hold EPA Section 608 certification for refrigerant handling and NATE certification on the air-side and electrical side, so a drain call can turn into a full system check without a second appointment. We carry the parts that fail alongside a clogged drain line: run capacitors, contactors, and float switches for Carrier, Trane, Lennox, Goodman, and Rheem air handlers.
- EPA Section 608 certified for safe refrigerant handling on every service call
- NATE-certified technicians trained on air-side and electrical diagnostics
- SC HVAC contractor license and Greenville County business license on file
- Factory training on Carrier, Trane, and Lennox condensate and drain systems
- OSHA safety certification for attic, crawlspace, and rooftop work
Why Greenville calls us for drain line clogs
We are a local AC company, not a call center. When you book AC drain line clog repair Greenville SC with us, you get a technician who knows Greenville homes and a price you hear before we start.
Upfront pricing, no surprises
You get a flat price for the drain line service before we pull out a tool. If we find a cracked pan or a failed float switch, we quote that repair separately and you decide. No hourly meter running while we work.
Same-day and emergency slots
We hold same-day openings for drain line backups because standing water does not wait. Call before noon and we can usually be at your door the same afternoon. After-hours emergency AC repair is available for flooded pans and no-cool calls.
We clear the whole line
A quick poke at the trap is not a repair. We clear from the pan to the termination point, flush with 2 to 3 gallons, and confirm drainage time. That is why our condensate drain cleaning Greenville SC customers rarely see the same clog twice in a season.
Parts on the truck
Float switches, drain pan tablets, PVC fittings, and condensate pumps ride on every van. If your clog came with a failed safety switch or a cracked pan, we fix it on the spot instead of scheduling a return trip.
What our drain line service includes
Every drain line visit covers the full condensate path, not just the visible clog. If we find a failed part or a cracked pan, we quote it before we replace it. Here is what is included in a standard AC drain line service Greenville call.
What's Included
Full line clearing
We clear the drain from the pan and trap all the way to the exterior termination point using a wet-vac, flush, and drain brush. You get a line that drains 2 to 3 gallons in under 30 seconds, verified before we pack up.
Pan and trap inspection
We check the drain pan for cracks, rust, and standing water, and confirm the trap holds a proper water seal. A dry trap pulls attic air into your system and drives up humidity, so we refill and test it every visit.
Float switch test
The float switch shuts your system down when water rises. We test it to make sure it still trips and resets correctly. A stuck switch can flood a pan, and a failed one can leave you with no cooling on a 95-degree day.
Drain pan tablets
We drop in slow-release tablets that inhibit algae and biofilm growth inside the pan and line. They typically hold up for 3 to 4 months in Greenville's humid summers, which lines up with a spring and fall maintenance visit.
Drainage test and cleanup
Before we leave, we run the system, watch the termination point, and clean up every drop we captured. You get a dry pan, a clear line, and a short explanation of where the line exits so you can keep an eye on it.
Problems a clogged drain line causes
A slow drain does not fix itself. These are the calls we run most often when an AC drain line clogged Greenville homeowners finally pick up the phone.
Water stains on ceiling or closet floor
Standing water in the pan overflows and soaks drywall, insulation, and flooring. Mold can start in 24 to 48 hours in a closed closet.
We wet-vac the pan, clear the line, and dry the area. If the pan is cracked, we replace it and reseal the drain connection so water goes where it should. Most stains stop spreading the same day.
AC shuts off and will not restart
The float switch trips when water rises, cutting cooling on the hottest day of the year. Homeowners often think the compressor failed.
We clear the clog, test the float switch, and reset the system. If the switch itself failed, we replace it from van stock. Most no-cool calls caused by a drain backup are cooling again within two hours.
Musty smell from vents
Standing water in the pan and a wet drain line grow algae and bacteria. The blower pulls that smell through every room in the house.
We clear and flush the line, clean the pan, and add drain pan tablets to stop regrowth. If the evaporator coil is dirty too, we quote a coil cleaning with a pump sprayer and fin comb so the air smells clean again.
Condensate pump runs constantly
A partially clogged line makes the pump cycle every few minutes. The motor wears out early, and a failed pump means water on the floor.
We clear the line downstream of the pump, test the check valve, and confirm the pump shuts off when the reservoir empties. If the pump is failing, we replace it on the same visit.
When Greenville homeowners call us
A 1970s ranch near Berea with a slab drain line that backs up every August.
We clear the full run, flush it, and add drain pan tablets. Because slab lines are hard to access, we also check the trap for a proper seal and show the homeowner the exterior termination point.
The line drains freely, the pan stays dry, and a spring flush keeps the clog from returning before the next cooling season.
An attic air handler in a two-story home off Augusta Road dripping into a bedroom ceiling.
We wet-vac the pan, clear the line to the soffit termination, and inspect the pan for cracks. The float switch gets tested and the pan gets tablets before we close up.
The ceiling stain stops spreading, cooling returns, and the homeowner knows exactly where to look if water ever appears again.
A downtown Greenville restaurant whose rooftop unit was shutting down during lunch service.
We cleared a heavy algae clog, flushed the line, and replaced a failed float switch. We also set the account on quarterly condensate drain cleaning so service is not interrupted again.
The rooftop unit runs through the lunch rush, and the manager has a standing maintenance schedule instead of emergency calls.
A new homeowner in Nicholtown who found water around the air handler two weeks after moving in.
We cleared the clog, checked the pan and trap, and walked the homeowner through the condensate path. We also tested the capacitor and contactor while we were there.
The pan is dry, the system cools, and the homeowner has a maintenance plan before next summer.
Tools and methods we use
Tools & Equipment
Wet-vac with drain attachment
Pulls standing water out of the pan and sucks the clog out from the termination end of the line without pushing debris deeper into the system.
Condensate drain brush and flush kit
Breaks up algae and biofilm inside the PVC, then flushes the line with low-pressure water so the full run drains clean.
Multimeter and clamp meter
Tests the float switch, condensate pump, and control board so we know the safety circuit works before we leave.
Coil cleaning pump sprayer and fin comb
Cleans a dirty evaporator coil and straightens bent fins when a wet pan has been feeding biological growth on the coil.
Manifold gauge set
Checks refrigerant pressures when a drain backup has caused a frozen evaporator coil or the system is not cooling after the clog clears.
Nut driver set and tube cutter
Opens air handler panels and cuts replacement PVC or drain tubing to fit when a line is cracked or improperly sloped.
Methods & Techniques
Two-direction flush
We clear from the termination point with a wet-vac, then flush from the trap side with water. Working both directions removes the clog and confirms the full line is open, not just the end you can see.
Drainage timing test
After the flush, we pour 2 to 3 gallons into the pan and time how long it takes to exit. A clear line drains that volume in under 30 seconds. Anything slower means we keep working.
Trap seal verification
The trap must hold water to block attic or crawlspace air from entering the system. We refill and test every trap, because a dry trap raises indoor humidity and makes the coil work harder.
Preventive tablet schedule
Slow-release drain pan tablets inhibit algae for 3 to 4 months. We time them to Greenville's cooling season so the line stays clear from May through September.
How drain line service works in Greenville
Greenville's summer dew points sit in the low 70s for weeks at a time, and that moisture has to go somewhere. A typical 3-ton system pulls 15 to 20 gallons of condensate a day in July and August. That constant flow is why algae grows so fast in drain lines here, and why we see more clogs in July than any other month. Older homes in Nicholtown, Sterling, and Sans Souci often have long, flat drain runs under slab or through unvented chases, which slows drainage and gives debris a place to settle. Newer construction in Heritage and Cherrydale tends to use attic air handlers with short lines to a soffit, and those clog less often but can still back up when a trap dries out. If you need condensate drain cleaning in Greenville South Carolina before the next heat wave, book it in spring. We work across Greenville County and the ZIP codes 29601, 29607, 29609, and 29605 most weeks.
Service Areas
Older commercial buildings and upper-floor residential units with rooftop or closet air handlers. Drain lines here often run long distances and need a full flush, not a quick poke.
Many two-story homes with attic air handlers. When a line clogs, water shows up in a bedroom ceiling before it shows up in the pan, so we check both.
Slab-built ranches with drain lines under the floor. These are harder to access, so we rely on termination-side clearing and a thorough flush to confirm flow.
A mix of older homes and renovations. We often find undersized or improperly sloped drain lines that need a fitting change to drain correctly.
Local Considerations
High summer humidity and long cooling runs
Systems produce 15 to 20 gallons of condensate a day, which feeds algae growth fast. Lines that drain fine in May can clog by mid-July without a spring flush.
Older slab and crawlspace drain routing
Long, flat runs in older Greenville homes drain slowly and collect debris. We clear from the termination side and verify drainage time instead of assuming the line is open.
Attic air handlers with short soffit lines
These clog less often but dry traps pull hot attic air into the system. We refill and test the trap on every visit to protect indoor humidity levels.
Pollen season in March and April
Pollen and dust pulled through the return can settle in the pan and line. Changing the air filter on schedule and flushing the line in spring keeps the drain clear.
Ceiling stain in an Augusta Road home
A two-story home had a brown water ring spreading across a bedroom ceiling. The attic air handler pan was full, the float switch had tripped, and the system had been off for two days in 94-degree heat.
We cleared a heavy algae clog, flushed the line with 3 gallons of water, and confirmed drainage in 22 seconds. The float switch reset, cooling returned within the hour, and the ceiling stopped spreading.
Maintenance & Follow-up
Drain pan tablets every 3 to 4 months and a spring flush before cooling season. The homeowner checks the soffit termination for drips once a month.
A downtown Greenville restaurant lost cooling during lunch service when the rooftop unit tripped on a full drain pan. The line had not been serviced in over a year and was nearly blocked solid.
We cleared the line, replaced a failed float switch, and flushed the full run. The unit ran through the next lunch rush without a hiccup, and pan temperature dropped back to normal.
Maintenance & Follow-up
Quarterly condensate drain cleaning on a standing schedule, plus a filter change every 60 days to keep dust out of the pan.
A slab-built ranch near Berea backed up every August for three years. The homeowner had been shop-vac-ing the pan herself and resetting the system each time, but the clog always came back.
We cleared the full slab run from the termination side, flushed it, and found a low spot where debris collected. After the flush, the line drained 3 gallons in 25 seconds and stayed clear through the rest of the summer.
Maintenance & Follow-up
Spring flush plus drain pan tablets. We also showed the homeowner the exterior cleanout so she can check flow herself in under a minute.
What drain line repair costs
Typical 2026 pricing for AC drain line clog repair Greenville SC runs $150 to $450 for a standard clear and flush, and $450 to $850 when a failed float switch, condensate pump, or cracked pan is part of the job. We quote the full price before we start, and we tell you if a repair can wait. If you want affordable AC drain repair Greenville, ask about our maintenance plan, which includes an annual condensate flush.
Pricing Factors
Access to the line
A line that exits at a soffit or exterior wall is quick to clear. Attic chases, slab runs, and lines buried behind finished walls take longer and add labor. We tell you which one you have before we quote.
Severity of the clog
A partial clog flushes out in minutes. A line blocked solid with algae and debris may need brushing, multiple flushes, and a longer drainage test. Severe clogs can double the time on site.
Failed components
Float switches, condensate pumps, and drain pans often fail alongside a clog. A new float switch or pump adds parts and labor. We quote these separately so you can approve or decline each item.
System size and type
A residential split system is straightforward. Commercial rooftop units and ductless mini-split heads have different drain routing and take more time to access and test.
Preventive add-ons
Drain pan tablets, a trap refill, and a scheduled spring flush add a small amount to the visit but cut the odds of a repeat clog. Most customers add them once they see how fast Greenville algae returns.
Typical Investment Range
$150 - $850 depending on scope
Actual pricing varies based on project scope and requirements
Value You Receive
A cleared drain line protects drywall, flooring, and insulation that cost far more to replace than the service itself. Upfront pricing means you know the number before we start, and our maintenance plan keeps the line clear for the season ahead.
Frequently Asked Questions
Have questions? We have answers. If you don't see your question here, feel free to contact us.
Call UsHow much does AC drain line clog repair cost in Greenville SC?
Most drain line clogs in Greenville run $150 to $450 for a clear, flush, and drainage test. If a float switch, condensate pump, or cracked pan needs replacing, expect $450 to $850. We quote the full price before we start, so you are never surprised by the bill. Maintenance plan customers get an annual flush included.
Why is my AC drain line clogged in Greenville?
Greenville's humid summers push 15 to 20 gallons of condensate a day through your drain line, and that moisture feeds algae and biofilm inside the PVC. Dust, pollen, and pan debris add to it. Older homes with long, flat slab runs clog fastest. A spring flush and drain pan tablets usually stop the cycle.
Can you clear a clogged AC drain same day in Greenville South Carolina?
Yes. We hold same-day slots for drain line backups because standing water damages ceilings and floors fast. Call before noon and we can usually be there the same afternoon. Most clears take 60 to 120 minutes, and cooling is often back the same visit.
How do I prevent AC drain clogs in Greenville?
Change your air filter every 60 to 90 days, flush the drain line each spring before cooling season, and use slow-release drain pan tablets every 3 to 4 months. Check the exterior termination point once a month for drips. If you see slow drainage, book a flush before the line blocks completely.
Licensed, certified, and reviewed
Certifications
Customer Reviews
Our attic unit shut off on a Friday and we had water in a bedroom ceiling. They came out the same afternoon, cleared the drain line, and showed us where it exits. Cooling was back before dinner and the ceiling stopped spreading. Fair price and no upsell.
I manage a restaurant downtown and our rooftop unit kept tripping during lunch. They cleared a nasty clog, replaced the float switch, and set us up on quarterly service. We have not missed a lunch rush since. Worth every penny.
Our Berea ranch backed up every August for years. They found a low spot in the slab line, flushed the whole run, and put us on a spring maintenance plan. This was the first summer with a dry pan. Honest techs who explained everything.
Related Services
Explore our other professional services
Central AC Repair
When a clogged drain line has caused a frozen evaporator coil or a system that will not cool, our central AC repair service picks up where the drain work ends. We diagnose the full system and get cooling back the same visit.
Central AC RepairEmergency AC Repair
A drain backup that floods a closet or shuts down cooling on a 95-degree day is an emergency. Our emergency AC repair team handles after-hours drain clogs, failed float switches, and no-cool calls across Greenville County.
Emergency AC RepairSame-Day AC Repair
Drain line clogs are one of our most common same-day calls. If you need a clogged AC drain fix Greenville SC today, we hold afternoon slots and carry the parts to finish the job in one trip.
Same-Day AC RepairResidential AC Repair
Most drain line work happens in homes, from slab ranches in Berea to attic air handlers off Augusta Road. Our residential AC repair service covers the full condensate path plus the electrical and refrigerant checks that go with it.
Residential AC RepairCommercial AC Repair
Restaurants, offices, and retail spaces in downtown Greenville rely on rooftop units that produce heavy condensate. We clear commercial drain lines and set up quarterly maintenance so a clog never interrupts business hours.
Commercial AC RepairDuctless Mini-Split AC Repair
Mini-split heads have their own condensate routing and small drain lines that clog with dust. We clear and flush them, check the pump on wall-mounted units, and confirm drainage before we leave.
Ductless Mini-Split AC RepairHeat Pump Repair
Heat pumps pull moisture in cooling mode just like a standard AC, and the drain line clogs the same way. Our heat pump repair service clears the line and checks defrost and refrigerant pressures while we are on site.
Heat Pump RepairCarrier AC Repair
Carrier air handlers use specific pan and float switch designs. We stock common Carrier drain parts and know where the line exits on the models we see most in Greenville homes.
Carrier AC RepairTrane AC Repair
Trane systems are common in Greenville, and their condensate traps can dry out in attic installs. We clear the line, refill the trap, and test the float switch on every Trane drain call.
Trane AC RepairLennox AC Repair
Lennox air handlers often pair with condensate pumps in finished basements and closets. We clear the line, test the pump, and confirm the safety switch works before we leave.
Lennox AC RepairGoodman AC Repair
Goodman units are a budget favorite in Greenville rentals and starter homes. We clear the drain line, check the pan for cracks, and quote any float switch or pump replacement on the spot.
Goodman AC RepairRheem AC Repair
Rheem air handlers in attic installs can develop slow drains when the line slopes the wrong way. We clear the clog, correct minor slope issues, and verify drainage time before finishing.
Rheem AC RepairYork AC Repair
York systems show up in both homes and light commercial spaces around Greenville. We handle drain line clearing, trap service, and float switch testing on the models we see most.
York AC RepairAmerican Standard AC Repair
American Standard air handlers share parts with Trane, so we carry compatible float switches and drain fittings. Drain clogs get cleared and tested the same visit.
American Standard AC RepairAmana AC Repair
Amana units in Greenville closets and attics need the same condensate care as any brand. We clear the line, flush it, and add drain pan tablets to slow algae regrowth.
Amana AC RepairAC Compressor Repair
A drain backup that trips the float switch can look like a compressor failure. We test the compressor and the safety circuit together so you do not pay for a repair you do not need.
AC Compressor RepairAC Condenser Repair
Outdoor condenser issues and indoor drain clogs often show up in the same week. If your system is short cycling or not cooling after a drain clear, we check the condenser fan motor and coil.
AC Condenser RepairAC Evaporator Coil Repair
A wet drain pan feeds biological growth on the evaporator coil. When a clog has left the coil dirty or frozen, we clean it with a pump sprayer and fin comb and confirm airflow.
AC Evaporator Coil RepairAC Fan Motor Repair
A blower motor failure can leave condensate sitting in the pan because airflow stops. We diagnose the motor and clear the drain line in the same visit.
AC Fan Motor RepairAC Capacitor Replacement
A weak run capacitor can cause short cycling that leaves moisture in the pan. We test capacitance with a multimeter and replace failed capacitors from van stock.
AC Capacitor ReplacementAC Contactor Replacement
A pitted contactor can keep the outdoor unit from running while the indoor blower still produces condensate. We test and replace contactors on drain-related no-cool calls.
AC Contactor ReplacementAC Thermostat Repair
A thermostat that will not call for cooling can leave a wet pan behind. We check thermostat operation alongside the drain line so the whole system runs as it should.
AC Thermostat RepairAC Refrigerant Leak Repair
Low refrigerant can freeze the evaporator coil, and a frozen coil drips heavily into the pan. We find and repair leaks with a leak detector and recharge with R-410A or R-32 as needed.
AC Refrigerant Leak RepairAC Refrigerant Recharge
After a leak repair, we recharge the system to the manufacturer's spec. Proper charge keeps the coil from freezing and stops the excess condensate that overwhelms a drain line.
AC Refrigerant RechargeAC Frozen Evaporator Coil Repair
A frozen coil is one of the top causes of a flooded drain pan. We thaw the coil, clear the drain line, and check airflow and refrigerant charge so it does not happen again.
AC Frozen Evaporator Coil RepairAC Blowing Warm Air
If your AC is blowing warm air after a drain backup, the float switch may still be tripped or the compressor may have shut down. We diagnose both and restore cooling.
AC Blowing Warm AirAC Not Turning On
A full drain pan trips the float switch and shuts the system down. We clear the clog, reset the switch, and test the control circuit so your AC turns on and stays on.
AC Not Turning OnAC Short Cycling Repair
Short cycling leaves moisture sitting in the pan and stresses the compressor. We check the capacitor, contactor, and refrigerant charge along with the drain line.
AC Short Cycling RepairAC Making Strange Noises
Gurgling from the air handler often means a partially clogged drain line. We clear the line, check the trap, and inspect the blower and fan motors for the source of the noise.
AC Making Strange NoisesWhat Greenville customers say
Real experiences from customers who chose our AC Drain Line Clog Repair services
"Water was dripping through our bedroom ceiling from the attic air handler. They cleared the drain line, flushed it with a few gallons, and tested the float switch. Drainage went from a slow trickle to a fast flow in about 20 seconds. They also showed me the soffit termination so I can check it myself. No mess left behind."
Marcus T.
Homeowner, Augusta Road
"We had a unit shut down on a tenant during a heat wave because the drain pan filled up. Their tech cleared the clog the same day and replaced a failed float switch. He also set us up on a spring flush for the whole building. That was two summers ago and we have not had a backup since."
Denise R.
Property Manager, Downtown Greenville
"Our slab drain line clogged every August like clockwork. They cleared the full run from the outside, found a low spot where junk collected, and flushed it until it drained fast. The drain pan tablets they added lasted the whole season. First summer in years I did not have to shop-vac the pan."
Raymond K.
Homeowner, Berea
Book AC drain line clog repair Greenville SC today
Standing water in your pan will not wait, and neither should you. Call Greenville AC Repair Pros for same-day AC drain line clog repair Greenville SC, upfront pricing, and a full line flush that stops the clog from coming back. Licensed, EPA-certified technicians across Greenville County.