Why does my house smell musty when the AC starts?

Musty startup odors usually mean mold or mildew on the evaporator coil or in the ductwork — common in Charleston's humidity. A pro can inspect the coil and ducts, and duct cleaning plus moisture control addresses the cause rather than the smell.

Should I repair or replace my old air conditioner?

With the extreme runtime Charleston demands, older systems lose efficiency fast. A pro weighs age, repair history, and refrigerant type — if a major repair approaches a large fraction of replacement cost on an aging unit, replacement usually wins.

Find an HVAC technician in Charleston, SC

Charleston homeowners deal with failing ACs, weak furnaces, and uneven airflow like everyone else. Tell us what's happening and we'll connect you with an independent local HVAC technician.

Neighborhoods & areas

Historic District
French Quarter
South of Broad
West Ashley

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Availability in Charleston

Pros serving Charleston County and surrounding areas
Emergency calls routed first for heating and cooling breakdowns
AirFlow connects you with independent local HVAC pros. It does not perform HVAC work itself.

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Charleston is deep in cooling country — air conditioners here run most of the year, and the long, humid summer is the season that decides how long HVAC equipment lasts.

Condensate management is the local specialty: ACs pull gallons of moisture from the air daily, and when drain lines clog with algae, the water has to go somewhere — usually through a ceiling. Ductwork in hot, humid attics and vented crawl spaces sweats, leaks, and grows mold. Near the water, salt air and storm exposure shorten outdoor equipment life — post-storm inspection of the condenser is routine care here.

When heating or cooling trouble hits your Charleston home — an AC blowing warm on a sweltering afternoon — AirFlow HVAC connects you with an independent local HVAC pro. Tell us what is happening and we will match you with a pro nearby, fast.

County: Charleston County
ZIP codes: 29401, 29403, 29407
Service area: Charleston, South Carolina

Charleston

Homes here, and the HVAC problems they get

Local housing notes

Slab-on-grade ranch homes with supply ducts running through scorching attics.
Concrete-block homes that hold humidity and challenge even well-sized systems.
Historic homes with retrofitted ducts or mini-splits working around plaster and pier foundations.

Common local HVAC issues

Year-round runtime wear: compressors, capacitors, and fan motors log extreme hours — failures cluster in the hottest months.
Ductwork mold: humid attics and crawl spaces turn leaky ducts into mold farms; musty odors at startup are the tell.
Storm damage: hurricane-season winds, flooding, and flying debris batter outdoor equipment.
Weak-heat freeze surprises: the rare hard freeze finds heat pumps on backup and idle furnaces failing to fire.
Tidal marshes and low-lying streets leave standing water around outdoor units after heavy rain, and technicians often find electrical components corroded long before the cabinet itself shows trouble.
Live oak pollen and Spanish moss shed heavily each spring, blanketing condenser coils and choking airflow until a professional cleans the fins.
Older homes near the historic district hide duct runs inside narrow wall chases and sealed crawlspaces, which makes small leaks harder to spot and repairs slower going.
Summer thunderstorms knock power out in blinks, so many households ask about surge protectors and float switches that shut the AC down before a drain backup ruins drywall and flooring.

Common calls in Charleston

Charleston FAQs

At least once a year before cooling season — and with Charleston's near year-round runtime, many pros recommend a second mid-season check. Constant use wears capacitors, contactors, and coils fast, and a tune-up catches the small problems before the hottest weeks.

Helpful guides

Nearby towns

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Heating or cooling problem? Don't wait on it.

Tell us what's happening and we'll connect you with an independent local HVAC technician who fits the job.