AC Replacement in Rock Hill, SC
There are 28 HVAC companies listed in Rock Hill, SC. When to replace an AC, what a good install includes, permits, and every company with tap-to-call.
When replacement makes sense
- The compressor or evaporator coil has failed, or the system needs repeated refrigerant top-ups.
- Repairs are getting frequent and the system is near the end of its service life.
- The system uses R-410A and has a leak. New residential systems have used lower-GWP refrigerants since Jan 1, 2025, so parts and refrigerant for the old system are a shrinking market (details in the cost guide).
- The house has grown, cooling is uneven, or bills keep climbing with no change in use.
What a good replacement job includes
- A load calculation (ACCA Manual J) to size the new system, not a copy of the old tonnage.
- Matched indoor and outdoor units with an AHRI certificate, meeting the Southeast minimum of 14.3 SEER2 for systems under 45,000 BTU/h (13.8 SEER2 at 45,000 and above).
- Refrigerant lines flushed or replaced, a new pad, disconnect, drain line and thermostat as needed, and the ductwork inspected for leaks and sizing.
- A permit and inspection where required, and the manufacturer's warranty registered in your name.
Permits in Rock Hill
York County Permit Services says a permit is required to install, alter or replace mechanical systems, and that all contractors must be licensed through SC LLR. The county issues permits for unincorporated addresses; if your home is inside town limits, the town's own building department handles it. Ask the installer who pulls the permit and who schedules the inspection, and get that in the quote (York County residential permits).
How to compare quotes
Get at least two written quotes that name the exact model numbers, SEER2 rating, refrigerant, what happens to the ductwork and the thermostat, permit handling and the labor warranty. The AC replacement cost guide walks through what drives the price and the national ranges published by the sources we checked.
Rock Hill notes
Rock Hill is in York County, SC, and the companies below are based there. For a repair instead of a replacement, see AC repair in Rock Hill. Ratings shown are Google's as of Oct 2026; we rank by rating, then review count, and never sell placement.
HVAC companies in Rock Hill
There are 28 HVAC companies listed in Rock Hill, each with tap-to-call. We list companies, not services, and we have not checked which jobs each one takes. Call to confirm a company works on your type of system before you book.
1 Tru Blu Heating and Cooling
Open 24 hours, every day
1582 Hagler Rd, Rock Hill, SC 297302 Andrews Heating & Cooling
Mon–Fri 8:00 AM – 7:00 PM
920 Albright Rd, Rock Hill, SC 29730
Sat 9:00 AM – 5:00 PM
Sun 9:00 AM – 4:00 PM3 Adams Services, LLC
928 E Main St, Rock Hill, SC 297304 IRV Plumbing, Electric & HVAC
Mon–Fri 7:00 AM – 6:00 PM
220 W White St Ste 220, Rock Hill, SC 29730
Sat 10:00 AM – 4:00 PM5 Brothers Air, Heat & Plumbing
1320 E Main St, Rock Hill, SC 297306 B & G Heating & Air Conditioning
630 E White St, Rock Hill, SC 297307 Accurate Heating and Cooling
Mon–Fri 7:00 AM – 8:00 PM
715 Dave Lyle Blvd, Rock Hill, SC 29730
Sat 9:00 AM – 7:00 PM
Sun 9:00 AM – 7:00 PM8 Airington Heating & Cooling
Mon–Fri 9:00 AM – 6:00 PM
635 S Jones Ave, Rock Hill, SC 297309 All Day Heating and Cooling
1051 Albright Rd Ste 213, Rock Hill, SC 2973010 Amaro Mechanical
Mon–Sat 8:00 AM – 6:00 PM
2236 Tuckaway Rd, Rock Hill, SC 2973011 Atlas Heating & Cooling
Mon–Fri 8:00 AM – 5:30 PM
3290 India Hook Rd, Rock Hill, SC 2973212 B B & T Refrigeration Inc
Mon–Fri 8:00 AM – 5:00 PM
252 Trexler Ln, Rock Hill, SC 2973213 Comfort Systems of York County
5010 Old York Rd, Rock Hill, SC 2973214 Contentment Heating and Air Conditioning
Mon–Fri 8:00 AM – 8:00 PM
350 Pickens St, Rock Hill, SC 2973015 Custom Air Heating & Cooling
1510 Yorkston Dr, Rock Hill, SC 2973016 Dynamic Comfort Mechanical
824 Bumpy Hollow Trail, Rock Hill, SC 2973217 Elite Air and Heat
2175 Mt Gallant Rd, Rock Hill, SC 2973218 Howell's Heating & Cooling
Every day 7:00 AM – 7:00 PM
860 Arlington Ave, Rock Hill, SC 2973019 Langford's Mechanical Services
Open 24 hours, every day
1010 E White St, Rock Hill, SC 2973020 Mabreeze HVAC
Mon–Fri 7:00 AM – 6:00 PM
3050 Denali Way, Rock Hill, SC 2973221 Melton Heating & Air Conditioning
1003 E Main St, Rock Hill, SC 2973022 Mericle Mechanical LLC
Mon–Fri 8:00 AM – 5:00 PM
121 S Wood St, Rock Hill, SC 29730
Sat 9:00 AM – 5:00 PM23 Panther Heating & Cooling
Open 24 hours, every day
722 Corporate Blvd Ste 105, Rock Hill, SC 2973024 Parker Heating & Air Conditioning
Mon–Sat 8:00 AM – 8:00 PM
454 Anderson Rd S, Rock Hill, SC 2973025 Robertson Heating & A/C Inc
718 Greenbriar Ave, Rock Hill, SC 2973026 Sam Robinson Heating & Air Conditioning
Mon–Fri 9:00 AM – 5:00 PM
224 Brice St, Rock Hill, SC 2973027 Taylor's Heating & Cooling
3398 Tanglewood Dr, Rock Hill, SC 2973228 US Air Heating and Cooling
4080 Homestead Rd, Rock Hill, SC 29732
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