Mt Pleasant Heating & Air · Lowcountry HVAC
Expert HVAC Services in Charleston, SC
Mt Pleasant Heating & Air provides heating and air conditioning repair, installation, replacement, maintenance, and emergency HVAC services for homeowners and businesses in Charleston and nearby Lowcountry communities.
Charleston’s Local HVAC Team
HVAC Services for Charleston Homes and Businesses
Mt Pleasant Heating & Air is a local HVAC contractor based in Mount Pleasant, South Carolina, serving Charleston and the surrounding Lowcountry for more than 20 years. Our technicians repair, install, and replace air conditioners, heat pumps, furnaces, and ductless mini-split systems, and we handle routine maintenance and emergency service for both homes and businesses.
Cooling problems are common in Charleston’s hot, humid summers, while heating repairs matter most during the cooler months. We provide AC repair and heating repair, new system installation and replacement, preventative maintenance, thermostat service, and 24/7 emergency HVAC service throughout Charleston and nearby communities.
When you call, you get upfront pricing, same-day appointments when available, and service on all major brands — with the quality and reliability of every job guaranteed.
What We Do
HVAC Services We Provide in Charleston
Complete heating and cooling care for Charleston homes and businesses — repair, installation, replacement, and maintenance on all major brands.
AC Repair
If your air conditioner is blowing warm air, short cycling, leaking water, or making unusual noises, our technicians diagnose and repair all major brands of cooling systems — with same-day appointments available in Charleston.
AC Installation & Replacement
We install new air conditioners sized for Charleston’s heat and humidity and replace aging systems that can no longer cool reliably. Every installation is set up to perform efficiently and matched to the home’s cooling needs.
Heating Repair
Furnace and heating system not warming the house? We repair furnaces, heat pumps, and other heating equipment across Charleston, so your home stays comfortable when temperatures drop in the Lowcountry.
Heating Installation
New heating systems installed and set up for dependable comfort in Charleston homes and businesses. We help you choose equipment suited to the property and get it running before cold weather arrives.
HVAC Maintenance
Seasonal maintenance helps catch developing issues, keep the system running as intended, and support reliable heating and cooling. Our preventative maintenance service covers AC and heating tune-ups for Charleston homeowners.
Emergency HVAC Service
Heating or cooling failure doesn’t wait for business hours. Mt Pleasant Heating & Air provides 24/7 emergency HVAC service in Charleston, so our team can respond when your home’s comfort is on the line — day or night.
Local HVAC Issues
Common HVAC Problems in Charleston
These are the heating and cooling issues Charleston homeowners call us about most often. Each one explains what to look for and when to get professional help.
AC Blowing Warm Air
An air conditioner that runs but never cools may have low refrigerant, a dirty coil, a failing compressor, or a thermostat problem. The cause is best identified with a professional inspection rather than guesswork.
When to call: the AC has not cooled properly for more than a few hours. Schedule AC repair in Charleston.
HVAC Not Turning On
A system that will not start can point to a tripped breaker, a faulty thermostat, a bad capacitor, or an electrical problem. Repeated failure to start is not something to keep resetting.
When to call: the system will not turn on after checking the thermostat and breaker.
Poor Airflow
Weak airflow from vents is often caused by clogged air filters, blocked ducts, or a blower issue. In Charleston’s climate, restricted airflow also makes cooling less effective and can strain the system.
When to call: airflow stays weak after replacing the air filter.
Uneven Temperatures
Hot and cold spots between rooms can come from undersized equipment, duct problems, or poor insulation. Zoned systems such as ductless mini-splits are one option, but a diagnosis comes first.
When to call: temperature differences between rooms are noticeable and consistent.
Short Cycling
An HVAC system that turns on and off in short bursts may be oversized, overheating, low on refrigerant, or sensing a faulty limit switch. Short cycling wears equipment out faster.
When to call: the system cycles on and off frequently without reaching the set temperature. See why AC short cycles.
Strange HVAC Noises
Banging, squealing, rattling, or hissing sounds can signal loose parts, a failing motor, a worn belt, or a refrigerant issue. Unusual noises usually mean something is wearing out.
When to call: the noise is new, loud, or getting worse.
Water Leaking from AC
Water around the indoor unit often means a clogged condensate drain line or a frozen coil. Left alone, leaks can damage walls, ceilings, and floors — common in humid Charleston summers.
When to call: water collects around the unit or you notice damp spots nearby. Learn about condensate drain clogs.
Thermostat Problems
A thermostat that shows the wrong temperature, ignores settings, or leaves the display blank can cause the whole system to misbehave. Sometimes the fix is programming; sometimes the thermostat needs replacing.
When to call: changing the settings does not change what the system does. Thermostat service can help.
Heating Not Working
No heat, weak heat, or a furnace that keeps shutting down can come from ignition problems, airflow issues, or a failing component. Getting heat restored quickly matters on cold Lowcountry nights.
When to call: the home is not reaching a comfortable temperature. See the furnace warning signs.
High HVAC Energy Usage
A sudden jump in energy use often points to a system working too hard — dirty coils, low refrigerant, leaking ducts, or an aging unit that has lost efficiency. A checkup can identify the cause.
When to call: energy bills rise sharply without a change in usage. Tips to lower cooling bills.
Why Choose Us
Why Charleston Homeowners Choose Mt Pleasant Heating & Air
Local Experience
A Lowcountry team with more than 20 years repairing and installing HVAC systems across South Carolina.
Fast Response
Same-day appointments when available, with upfront pricing before work begins.
24/7 Emergency Service
Emergency help for heating and cooling failures whenever they happen — including severe weather.
Heating & Cooling Expertise
Repair, installation, and maintenance for all major brands of AC, heat pumps, furnaces, and ductless systems.
How It Works
Fast, Straightforward HVAC Service
Three simple steps from phone call to comfortable home.
Call or Request Service
Reach us by phone or the contact page. We’ll listen to the problem and find the earliest appointment — same-day when available.
We Diagnose with Upfront Pricing
A technician inspects the system, explains what’s wrong, and gives you the price before any work begins.
We Fix It Right — Guaranteed
Repairs, installations, and maintenance are completed on all major brands, with the quality and reliability of every job guaranteed.
Repair or Replace
Repair or Replace Your HVAC System?
There is no single rule for when to repair an HVAC system and when to replace it. The right answer depends on the equipment, its age, and how it has been performing. Charleston homeowners typically weigh a few key factors with their technician before deciding.
If a repair makes sense and the system is otherwise healthy, repair is usually the straightforward choice. If the system is old, needs frequent repairs, or is no longer keeping the home comfortable, replacement may cost less over time than continuing to patch it.
You can also read our guide to repair versus replacement for your HVAC system for a closer look at the factors involved.
Not sure whether to repair or replace? A professional evaluation can give you a clear picture of the system’s condition and the options.
Factors Homeowners Typically Consider
- Equipment age — older systems are more likely to fail and less efficient
- Recurring repairs — how often the system has needed service recently
- System performance — whether it keeps the home comfortable
- Efficiency — rising energy use is a common sign of decline
- Repair cost — how the estimate compares to a replacement
- Parts availability — older equipment can be harder to source parts for
- Comfort problems — uneven temperatures or poor airflow across the home
Preventative Care
HVAC Maintenance in Charleston
Regular maintenance gives a technician the chance to inspect the system, catch developing issues early, and keep everything running as it should. For Charleston homeowners, that usually means a tune-up before the summer cooling season and another before winter heating.
Maintenance needs vary by equipment type, age, usage, and the property itself — so the right schedule depends on your specific system. Our HVAC preventative maintenance service is designed around those inspections. You can also read our overview of the benefits of HVAC maintenance.
What a Maintenance Visit May Help With
- Identifying developing issues before they turn into breakdowns
- Maintaining system performance so heating and cooling work reliably
- Supporting consistent heating and cooling through the season
- Spotting airflow or equipment issues while they are still small
Service Area
Serving Charleston and Nearby Communities
We provide HVAC service in Charleston and serve homeowners in surrounding Charleston-area and Lowcountry communities.
Common Questions
HVAC Questions from Charleston Homeowners
Direct answers to the questions we hear most from homeowners in Charleston and the surrounding area.
How much does HVAC repair cost in Charleston?
Repair costs vary with the problem, the system, and the parts involved, so there is no single price for HVAC repair in Charleston. Mt Pleasant Heating & Air provides upfront pricing before work begins, and a technician can give you an exact estimate after diagnosing the issue. Call (843) 714-0863 to describe the problem and arrange an appointment.
Do you provide emergency HVAC service in Charleston?
Yes. Mt Pleasant Heating & Air provides 24/7 emergency HVAC service in Charleston and the surrounding area. If your heating or cooling system fails at an inconvenient time — including severe weather — call (843) 714-0863 and our team will help you get comfort restored.
How quickly can an HVAC technician come to Charleston?
We offer same-day appointments when available, and because our team is based in nearby Mount Pleasant, Charleston is a short drive away. Call (843) 714-0863 to check the earliest opening and schedule service for your home or business.
What HVAC systems do you service?
We service all major brands of air conditioners, heat pumps, furnaces, and ductless mini-split systems, along with thermostats and related equipment. Whether the system needs repair, installation, replacement, or routine maintenance, we can usually handle it.
Do you install new air conditioners?
Yes. We install new air conditioners for Charleston homes and businesses, including replacement of aging systems. Our AC installation service sizes the equipment for the property and the local climate so it cools reliably through Lowcountry summers.
When should I replace my HVAC system?
There is no fixed age that forces a replacement. Homeowners usually start weighing it when a system is older, needs frequent repairs, uses more energy, or no longer keeps the home comfortable. A professional evaluation — like the one described above — can tell you whether repair or replacement makes more sense for your system. You can also read our repair versus replacement guide.
How often should HVAC systems be maintained?
Many Charleston homeowners schedule maintenance before the summer cooling season and again before winter heating, but the right frequency depends on the equipment type, age, usage, and property. A technician can recommend a schedule that fits your system during a preventative maintenance visit.
Do you service heat pumps?
Yes. Heat pumps are common in the Charleston area, and our heat pump repair service covers diagnosis, repair, and maintenance for all major brands.
Do you provide heating repair as well as AC repair?
Yes. We provide both heating repair and AC repair in Charleston, along with installation, replacement, maintenance, and emergency service for heating and cooling systems.
Which areas around Charleston do you serve?
We serve Charleston and surrounding Charleston-area and Lowcountry communities, including Mount Pleasant, West Ashley, James Island, Johns Island, and Daniel Island. See our service areas page for more, or call (843) 714-0863 if you are unsure whether your address is covered.
Need HVAC Service in Charleston?
Our local team is ready to help with heating and cooling problems when you need us.
Find Us
Based in Mount Pleasant, Serving Charleston
- 1400 Midtown Ave Ste 401, Mt. Pleasant, SC 29464
- (843) 714-0863
- Mon–Sun · 24/7