Skip to main content

Free second opinion

Heating

Heating Repair & Installation in Charleston, SC

Charleston winters are short, but a January cold snap with no heat is miserable in any climate. Holy City Heating & Air repairs, maintains, and replaces furnaces and heating systems across the Lowcountry, with call support until 9 PM when the heat quits at the wrong time.

Holy City technician working on a heating system at a Charleston-area home
On the job: our technicians photograph and explain what they find.

What this service covers

Heating service in the Lowcountry covers gas furnaces, electric heat, heat pumps in heating mode, and hybrid (dual-fuel) setups. Repair work ranges from ignition and airflow faults to blower motors, control boards, and safety components.

Because our heating season is brief, problems often hide until the first real cold morning — the system that 'worked fine last year' sat idle for eight months. A pre-season inspection catches those surprises early.

Why it matters in the Lowcountry

Safety is the first reason: gas furnaces need intact heat exchangers and proper venting, and any combustion appliance deserves periodic professional inspection.

Comfort and cost are the second: heating a poorly maintained system through even a short Charleston winter costs more than it should, and moisture problems can develop in homes that stay cold and damp.

Signs it’s time to call

  • The system blows cool or lukewarm air in heating mode
  • Short bursts of heat followed by long pauses
  • A burning or musty smell when the heat first kicks on that doesn't fade
  • Rising bills without a change in the weather
  • Frequent breaker trips or the furnace failing to ignite

How the visit works

  1. Diagnose

    We test ignition, airflow, electrical components, and safety controls to isolate the fault — and inspect the heat exchanger on gas systems.

  2. Explain

    You get a plain-language explanation of what failed and a written estimate before any repair begins.

  3. Repair or replace

    Most heating repairs are completed the same visit. If the system is at end of life, we'll price a replacement honestly alongside the repair.

  4. Verify

    We confirm heat rise, cycling behavior, and safety operation before we leave.

What affects the price

Every home is different, so we quote in writing before work begins. The main factors:

  • Fuel type — gas furnace, electric, or heat pump components
  • The failed part and its availability for your model
  • Age of the system and refrigerant type (for heat pumps)
  • Venting, gas-line, or electrical corrections needed for safety or code

Repair or replace?

Furnaces in our mild climate often last a long time — but a cracked heat exchanger is a replacement conversation, not a repair.

If you're heating with aging electric resistance heat, a modern heat pump usually costs far less to run in a Charleston winter — and upgrades your cooling at the same time.

Keeping it running

  • Schedule a heating tune-up in the fall, before the first cold snap fills every service calendar in town.
  • Replace filters going into winter — heating airflow matters as much as cooling airflow.
  • If you smell gas or suspect a venting problem, shut the system down and call immediately.

Heating Repair & Installation: common questions


Do Charleston homes really need heating service?

Yes — precisely because the season is short. Systems sit unused for most of the year, and faults appear on the first cold morning. A fall inspection is inexpensive insurance against a no-heat call in January.

Should I replace my furnace with a heat pump?

In the Lowcountry's mild winters, heat pumps are an excellent fit for many homes — one system handles both seasons efficiently. We'll assess your home, your ductwork, and your current equipment and give you an honest comparison.

What if my heat goes out at night or on a weekend?

Call (843) 790-6504. We provide call support until 9 PM, so you'll reach a person and we'll get help moving.

Rainbow Row's pastel historic houses on East Bay Street in Charleston, South Carolina

Y’all deserve to be comfortable.

Schedule an appointment with us today — or call and talk to a real person, until 9 PM.