Find a 24/7 HVAC Technician in Charleston, SC
When your AC or heat fails on the worst day of the year, every hour matters. Connect with an independent local HVAC pro now — 24/7 dispatch nationwide.
By Gyanesh Gulshan — Founder, Cool Call Pro
Common Charleston HVAC emergencies
Call Now — (844) 582-179524/7 dispatch · Charleston-area network
AC out, blowing warm, or iced over
Outdoor unit silent · indoor blower running but warm air · ice on the refrigerant lines · short-cycling on/off. The most common cause is electrical (capacitor, contactor) or refrigerant — both require a technician.
Furnace not igniting or blowing cold
Furnace won't ignite · blowing cold air · short-cycling · burning smell on first startup. If you smell gas, leave the building immediately and call 911 first.
Banging, screaming, or grinding outdoor unit
Loud bangs · metal-on-metal screaming · grinding or rattling from the outdoor unit. Failing fan motors, loose blower wheels, and worn compressor bearings are the usual causes. Turn the system off and call — running through these noises spreads the damage.
About the Cool Call Pro Charleston network
24/7 Charleston Dispatch
Independent HVAC providers offering round-the-clock emergency response across the Charleston metro — including weekends and holidays. Overnight surcharges are set by the individual provider.
Charleston Metro Coverage
Independent providers across major Charleston neighborhoods, routed to your area by current availability. The full ZIP-level coverage detail is in the Services & service area section below.
SC LLR Residential Builder or Contractor License
All HVAC contractors in South Carolina should hold a current SC LLR Residential Builder or Contractor License. Verify any contractor at the LLR / Residential Builders Commission before you hire.
Charleston's mixed-humid climate & your HVAC
This Zone 3A (Warm-Humid) climate splits the year between heating and cooling load. Federal SEER2 14.3 (Southeast Region) minimum applies to new AC equipment. Heat pumps that handle both heating and cooling from one outdoor unit are an increasingly popular choice.
Avg summer high
IECC zone (mixed-humid)
Avg winter low
Federal SEER2 minimum
Days/yr above 90°F
Days/yr below 32°F
In Charleston, the median home was built in 1994 with a current median value of $469,100. Around 56% of homes are owner-occupied. About 24% of households heat with natural gas vs. 74% electric. The South Carolina grid averages $0.16/kWh. Sources: U.S. Census ACS · U.S. EIA state rates.
Read our guide on heat pump guide.
HVAC in Charleston, SC: local data & sources
Every numerical claim below references a federal, state, or municipal primary source — NOAA climate normals, U.S. Census ACS, the South Carolina licensing authority, and your local utility's published rebate program.
NOAA NCEI 1991–2020 Normals
Charleston International Airport (KCHS) is the official NOAA reference station for Charleston, South Carolina. Per the NOAA NCEI U.S. Climate Normals 1991–2020 (station USW00013880), Charleston records an annual mean temperature of 66.5°F, an average annual maximum of 76.7°F against an annual minimum of 56.4°F, approximately 1,977 annual heating degree days against 2,304 cooling degree days, an annual precipitation normal of 52.51 inches, and an annual snowfall normal of just 0.5 inches. Charleston averages 55.2 days per year above 90°F and only 24.4 days below freezing. The 1.2:1 CDD-to-HDD ratio places Charleston among the most cooling-dominant markets in the project, with summer latent (humidity) loads the dominant design driver. Charleston also faces meaningful Atlantic hurricane exposure: per the NWS Charleston Tropical Cyclone History, 41 tropical cyclones made landfall in the NWS Charleston area between 1851 and 2018, including four major (Category 3+) storms — the 1893 Great Charleston Hurricane, Hazel (1954), Gracie (1959), and Hugo (1989). Coastal salt-air corrosion shortens the service life of outdoor condenser coils relative to inland markets.
U.S. Census ACS 2022 5-Year
The U.S. Census Bureau ACS 2023 5-year estimates (Tables B25040 and B25035 for Charleston city, South Carolina) report 66,408 occupied housing units with a median year built of 1994 — one of the newer median ages among Southeast cities, reflecting decades of Lowcountry growth. Heating-fuel distribution: 74.2% electricity (49,266 units), 23.8% utility natural gas (15,793 units), and 442 units on bottled/tank/LP gas. The 55.6% owner-occupancy rate and median home value of $469,100 reflect Charleston’s high-value coastal housing market. The strong electric majority reflects the modest winter heating load in Zone 3A — heat-pump primary heat handles the 1,977 HDD requirement efficiently without auxiliary fuel. South Carolina’s residential average electricity rate of 16.15¢/kWh (EIA Electric Power Monthly) is moderate by national standards.
South Carolina State Resource
South Carolina regulates HVAC work through two paths. Residential HVAC work is licensed by the South Carolina Residential Builders Commission (Department of Labor, Licensing & Regulation). The Residential HVAC contractor license fee is $220, requires the qualifying party to pass the PSI trade exam plus the SC business and law exam, and requires a $10,000 surety bond if the total cost of any project exceeds $5,000. Licenses renew every two years. Commercial mechanical work is regulated by the South Carolina Contractor’s Licensing Board; the commercial Mechanical Contractor (subclassification HT, AC, etc.) license carries a $350 initial fee, requires two years of work experience, and uses a financial-statement-based group classification rather than a fixed bond amount. Verify a specific Charleston contractor’s current license status on the LLR public lookup before contracting.
Utility & Permit Sources
Charleston’s electric service is provided by Dominion Energy South Carolina, which administers a published residential HVAC rebate program for eligible customers. Current published amounts: $400–$500 toward the purchase and installation of an ENERGY STAR® central air conditioner or heat pump (replacement of existing equipment); $650 when an electric furnace is replaced with an ENERGY STAR® heat pump; and $750 for an ENERGY STAR® certified heat pump water heater. South Carolina’s state-administered Home Electrification & Appliance Rebates (HEAR) program, funded under the Inflation Reduction Act and administered by the South Carolina Energy Office, was not yet open for consumer applications as of early 2026 — the SCEO is finalizing software and contractor enrollment, with statewide launch anticipated later in 2026. Once open, HEAR will provide up to $14,000 per household for electrification upgrades for households at or below 150% of county AMI (program rules).
The federal Section 25C Energy Efficient Home Improvement Credit was terminated for installations placed in service after Dec 31, 2025 by the One Big Beautiful Bill Act (Public Law 119-21). State HEAR rebates and utility programs remain in effect. See our HVAC financing options for what's still available.
Services & service area
What our network covers
- Emergency AC Repair in Charleston
- Furnace Repair & Heating Service in Charleston
- Heat Pump Installation & Dual-Fuel Systems
- Central Air Conditioning Installation & Replacement
- HVAC System Maintenance & Seasonal Tune-Ups
Where we connect homeowners
- South of Broad — ZIP 29407
- Mount Pleasant — ZIP 29412
- James Island — ZIP 29414
- West Ashley — ZIP 29403
- Harleston Village — ZIP 29406
Common HVAC repair costs in Charleston, SC
Typical 2026 ranges. Actual price varies by provider and complexity.
Diagnostic / service call
$65–$150
Often waived if you book the repair
Common AC repair
$90–$450
Capacitor, contactor, thermostat, drain line
Refrigerant recharge
$150–$600
R-410A per recharge; leak fix extra
After-hours surcharge
$100–$300
Added to repair cost on emergency calls
See full repair, install, and replacement ranges in our 2026 HVAC Cost Guide →
Ready to talk to a Charleston HVAC pro?
Independent technicians · 24/7 dispatch · SC LLR Residential Builder or Contractor License-verified network
Call Now — (844) 582-1795Disclosure: We are a referral service and may receive compensation for qualified calls. Calls may be routed to an independent provider network and may be recorded. Pricing and availability vary by provider and location.
Frequently Asked Questions — Charleston, SC
Yes, ensure your contractor files a mechanical permit with the City of Charleston Permit Center. Pulling the correct permits protects you as a homeowner and ensures work is inspected to code.
Homeowners may qualify for savings through Dominion Energy South Carolina. Check with Dominion Energy SC Rebates ($400–$500 on ENERGY STAR units) for current offers. The federal Section 25C credit was terminated for installations after Dec 31, 2025 (OBBBA, P.L. 119-21); check current state and utility programs for 2026.
Our network covers Charleston and surrounding areas including 29407, 29412, 29414, 29403, 29406. Call (844) 582-1795 to verify service availability for your specific ZIP code.
A standard AC replacement in Charleston typically costs $3,500–$8,000, and furnace installations run $3,500–$7,000. Costs vary based on system size, efficiency rating, and installation complexity. In South Carolina, new AC units must meet a minimum SEER2 14.3 (Southeast Region) rating.
In South Carolina, HVAC contractors should hold a SC LLR Residential Builder or Contractor License. Always verify your contractor's credentials before authorizing work. For Charleston residents, permits are filed through the City of Charleston Permit Center.