AC Repair in Mount Pleasant, South Carolina
An AC repair visit in Mount Pleasant, SC usually costs $220 to $1,010. Where you land depends on the part. A capacitor or contactor sits at the low end, while a condenser fan motor or a refrigerant leak repair pushes the bill toward the top.
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Mount Pleasant Weather and HVAC Load
NOAA's 1991-2020 climate normals put Mount Pleasant at 2,051 heating degree days and 2,279 cooling degree days per year. Neither season dominates in Mount Pleasant. That balance is a big reason heat pumps and dual-fuel systems sell well in South Carolina. On average, Mount Pleasant gets 18 freezing nights and 55 days above 90°F per year. On the cooling side, a 2,000 sq ft house here usually needs around 3.5 tons. A tight, well-insulated house may get by with half a ton less.
| Heating degree days / year | 2,051 |
|---|---|
| Cooling degree days / year | 2,279 |
| Nights at or below 32°F | 18 |
| Days above 90°F | 55 |
| Average low / high | 55.3°F / 75.8°F |
Mount Pleasant Housing Stock
Census figures put the median build year in Mount Pleasant at 2000, so a typical house here has about 26 years on it. Plenty of houses from this period still run original 1990s or early-2000s equipment, which is past its expected service life. Mount Pleasant has roughly 29,000 owner-occupied homes, or 73.7% of households. Homes here have a median value of $667,100 and households a median income of $121,364. Those two numbers drive the labor adjustment in our estimate.
NOAA storm reports for Charleston County show 11 hail days and 34 days with damaging thunderstorm winds over the six years from 2020 to 2025. The largest hail reported was 1.25 inches across. Hail flattens the thin aluminum fins on condenser coils and cuts airflow. After a big storm, take a look at the outdoor unit; homeowners insurance often covers the damage. Charleston County also had 8 tornado days in that period. In Mount Pleasant, 18% of residents are 65 or older. For older adults, a house with no heat in January or no AC during a heat wave is a medical risk. Mention it when you call, since many companies put those calls first.
Symptoms Worth a Service Call
- The system cycles on and off every few minutes
- The AC runs, but the air coming out is warm
- Ice on the refrigerant lines or the indoor coil
- The outdoor unit hums, but the fan doesn't spin
- The breaker trips when the AC kicks on
What Moves the Price
- Refrigerant type and how many pounds it takes
- Nights, weekends and holidays
- Whether the equipment sits in a tight attic or on a roof
- The part: a capacitor costs a fraction of a fan motor, and a compressor costs far more than both
- The service call or diagnostic fee
For Mount Pleasant we raised the national figures about 44%, based on local income, home values and climate-based equipment sizing. Get at least three written quotes; real bids can land outside this range.
What the Quote Should Cover
- Diagnosis and electrical testing
- Replacing the failed part
- A test run
- Clearing the drain line if it's clogged
- Checking refrigerant pressures
South Carolina Licensing and Efficiency Rules
South Carolina is in the DOE's Southeast region, where new split central air conditioners need at least 14.3 SEER2 (13.8 SEER2 for systems of 45,000 BTU/h and up). Most repairs don't need a permit. Anyone who opens the refrigerant circuit does need EPA Section 608 certification, and in South Carolina the company should carry a state license or registration. Ask for both.
Before You Hire
- If you see ice, shut the system off. Running it frozen can kill the compressor.
- Ask for the per-pound refrigerant price before any work starts.
- If the compressor is gone on an older unit, get a replacement quote before you pay for the repair.
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AC Repair Questions from Mount Pleasant Homeowners
What does AC repair cost in Mount Pleasant?
Most bills land between $220 and $1,010, including the service call. A typical visit is about $650. Night and weekend calls cost more.
What is the most common AC repair?
A failed run capacitor. The part is cheap, and the swap usually takes less than an hour.
Why is my AC freezing up?
Usually poor airflow, from a dirty filter or coil, or low refrigerant from a leak.
AC Repair Near Mount Pleasant
- Charleston $190 to $870
- North Charleston $150 to $720
- Rock Hill $150 to $690
- Columbia $140 to $670
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Sullivans Island; NOAA Storm Events Database 2020-2025, Charleston County. Prices are our estimates, not contractor quotes. Updated 2026.