Heat Pump Repair in Mount Pleasant, South Carolina
Heat pump repair in Mount Pleasant starts near $250 for a simple fix and can reach $1,230 for after-hours calls or major parts. A typical bill is closer to $790.
Compare Free Quotes in Mount Pleasant
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.
| 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
- Ice builds up on the unit and doesn't melt off
- The system is stuck in heating or cooling
- Cool air coming out in heating mode
- The backup heat runs nonstop
What Moves the Price
- Finding and fixing a refrigerant leak, then recharging
- Emergency or after-hours service
- Whether the parts warranty still covers it
- Which part needs replacing: a reversing valve, defrost board or sensor
- The 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 in both heating and cooling mode
- A defrost cycle test
- A full test run
- Checking refrigerant pressures
- Replacing the failed parts
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
- Keep two feet clear around the outdoor unit, including snow.
- Many heat pumps carry a 10-year parts warranty if they were registered. Find out whether yours was.
- Book maintenance twice a year, once before summer and once before winter.
Get Free Heat Pump Repair Quotes in Mount Pleasant
Tell us where you are and up to three licensed local pros will get in touch. You don't have to hire any of them.
Heat Pump Repair Questions from Mount Pleasant Homeowners
What does heat pump repair cost in Mount Pleasant?
Most bills land between $250 and $1,230, including the service call. A typical visit is about $790. Night and weekend calls cost more.
Why is my heat pump blowing cold air?
For a few minutes during a defrost cycle, that's normal. If it keeps going, the usual causes are a stuck reversing valve, low refrigerant or a thermostat set to the wrong mode.
Is it normal for a heat pump to freeze?
A thin layer of frost in winter is normal, and the defrost cycle should clear it. Heavy ice that stays usually means a defrost control or airflow problem.
Heat Pump Repair Near Mount Pleasant
- Charleston $220 to $1,060
- North Charleston $180 to $880
- Rock Hill $170 to $830
- Columbia $170 to $820
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.