Get Local AC Repair and Replacement Relief In Mount Pleasant
My Three Sons HVAC provides AC repair, heat pump service, ductless mini-splits, and HVAC replacement and maintenance for homes in Mount Pleasant, SC, including the 29464, 29466 and 29429 zip codes and neighborhoods such as the Old Village, I'On, Dunes West, Carolina Park, Rivertowne and Hamlin Plantation. The company is locally owned, based in nearby Hanahan, licensed under SC License CLM.117596, and reachable at (843) 353-3135.
HVAC Problems We See in Mount Pleasant Homes
Mount Pleasant sits between the harbor, the marsh and the ocean, and that shapes what goes wrong with heating and cooling systems here.
Salt air and outdoor unit corrosion
Homes near Shem Creek, the harbor, the marsh and out toward the beaches see salt air eat at outdoor coils, fins and electrical connections faster than inland. A coil that's corroded through can leak refrigerant and leave your AC blowing warm air. We check for it on every visit and can talk you through coastal-grade options when it's time to replace.
Humidity that the AC can't keep up with
If your home feels cool but sticky, the system may be oversized, the drain may be clogged, or the ductwork may be pulling in humid attic air. We look at the whole system, not just the thermostat reading.
Older homes and newer builds
Mount Pleasant runs from older homes in the Old Village to newer neighborhoods like Carolina Park and Dunes West. Older homes often need duct repairs or a ductless system for rooms the central unit can't reach. Newer homes often have builder-grade equipment in a hot attic that benefits from a good tune-up and a close look at airflow.
A Recent Job in Mount Pleasant
Leaking TXV replacement
On a recent call in Mount Pleasant (29464), we replaced a leaking TXV on a 2015 Trane 2.5-ton heat pump. The TXV is the valve that meters refrigerant into the indoor coil, and a leak there slowly drains the system's charge.
- Step 1Installed a new TXV with a new Teflon seal
- Step 2Pressure tested the system and passed a vacuum decay test
- Step 3Recharged it to Trane's specifications
- ResultTemperature split back in the normal range, house down 3 degrees before we left
HVAC Services for Mount Pleasant Homes
Repair, replacement, installation, maintenance and ductless service for every kind of Mount Pleasant home, from historic Old Village houses to new builds in Carolina Park.
HVAC Repair Services
Warm air, weak airflow, a frozen line or a system that won't turn on. We find the actual cause and give you options before we start.
AC Repair in Mount Pleasant
When your AC quits on a humid afternoon, we track down the real cause, whether it's a failed part, a clogged drain or a salt-worn coil, and give you a price before we fix it.
AC repairHeat Pump Repair
Most homes from the Old Village to Dunes West heat and cool with a heat pump. We repair ducted and ductless systems, including the problems that show up when a heat pump runs almost all year.
Heat pump repairFurnace Repair
For Mount Pleasant homes with a gas furnace, we diagnose what's keeping the heat from coming on so your family stays warm on the coldest Lowcountry nights.
Furnace repairHVAC Replacement Services
When a system is past its useful life, we size a new one to your home and back it with the MTS Installation Advantage: a quality control inspection, an extended labor warranty and one year of free maintenance.
AC Replacement
Salt air near the harbor, Shem Creek and the marsh can wear an outdoor unit out early. When repairs stop making sense, we replace it and talk you through coastal-grade options.
AC replacementHeat Pump Replacement
A heat pump that runs nearly year-round eventually wears out. We replace it with a system sized to your home, so it handles both a Lowcountry summer and a cold snap.
Heat pump replacementFurnace Replacement
Upgrade an aging gas furnace before winter and get relief from the chill without worrying about whether it will start.
Furnace replacementHVAC Installation Services
Building, adding on or putting in a system for the first time? New installations keep you cool in summer, warm in winter, and are backed by the MTS Installation Advantage.
AC Installation
From new construction in Carolina Park to an addition on an older home, we install AC sized for the space and for Mount Pleasant's humidity.
AC installationHeat Pump Installation
One system for both seasons. A heat pump suits Mount Pleasant's long cooling season and mild winters, beating the summer heat and the winter chill.
Heat pump installationFurnace Installation
Get a new gas furnace installed and fend off the winter chill in your Mount Pleasant home.
Furnace installationHVAC Maintenance Services
Keep a good system from going bad. Our Family Maintenance Program includes two visits a year, 15% off repairs, and priority scheduling.
AC Maintenance
Salt air and humidity are hard on cooling systems. A tune-up before summer catches early coil corrosion and clogged drains before they turn into a no-cool call.
AC maintenanceHeat Pump Maintenance
Twice-a-year visits for a system that works almost every day of the year, so it lasts longer and runs efficiently.
Heat pump maintenanceFurnace Maintenance
A check before the first cold snap, so your furnace is ready when Mount Pleasant temperatures drop.
Furnace maintenanceDuctless Air Conditioning Services
Gone ductless in Mount Pleasant? We have you covered. Ductless mini-splits are a good fit for bonus rooms, additions, porches that were enclosed, and older homes without ducts.
Ductless Mini-Split Installation
Comfort for rooms the central system can't reach, like a bonus room over the garage or an Old Village home without ductwork.
Ductless servicesDuctless Mini-Split Repair
Honest, local repair for ductless units in Mount Pleasant, from no-cool calls to drain and airflow problems.
Ductless servicesDuctless Mini-Split Replacement
Replacing an aging mini-split made easy for Lowcountry families, with a new unit sized to the room.
Ductless servicesDuctless Mini-Split Maintenance
Regular cleaning and checks keep a good ductless unit from going bad, especially through the humid months.
Ductless servicesNot sure what you need?
Tell us what your system is doing and we'll give you an honest diagnosis and a clear price first.
Mount Pleasant Zip Codes and Neighborhoods We Serve
We serve all of Mount Pleasant, including the 29464, 29466 and 29429 zip codes and neighborhoods like Rivertowne, Hamlin Plantation, Oyster Point, Brickyard Plantation, Dunes West, Carolina Park, I'On and the Old Village, plus the rest of the town and nearby Sullivan's Island and Isle of Palms.
Also nearby: HVAC on Sullivan's Island and HVAC on Isle of Palms.
How Fast Can You Get to Mount Pleasant?
Our Hanahan shop is a short drive from Mount Pleasant by I-526, so the town is part of our regular route. Call (843) 353-3135 early in the day for the best chance at a quick appointment. Family Maintenance Program members get priority scheduling. AC out completely? See our emergency AC repair page for what to check while you wait.
What Does AC Repair Cost in Mount Pleasant?
Our diagnostic fee is $85 to $150 per system, depending on the appointment date and time, the type of system and the property. The price of the repair depends on the part and labor involved, and you'll have the full price before we begin. Military, first responder and educator discounts apply.
Depends on the appointment date and time, the type of system and the property. You get the full repair price before any work begins.
Our Guarantee & What to Expect
When you book HVAC with My Three Sons HVAC, you get a clear, upfront price before any work begins. No surprises and no pressure.
Service work is covered by a one-year workmanship warranty from the date of service: if anything related to our workmanship needs attention, we take care of it at no cost to you (it doesn't cover misuse, lack of maintenance or outside causes).
New system installations are backed by the MTS Installation Advantage, which includes an extended labor warranty. We stand behind our work.
What Your Neighbors Say
"Our technician, Dale, was prompt, friendly, extremely knowledgeable, and highly professional. He took the time to thoroughly troubleshoot our air conditioning system, clearly explained what was causing the problem, made the necessary repairs, and then carefully verified that everything was working properly before he left."
"We needed a complete replacement of our duct work, and My Three Sons were outstanding. The crew was organized and courteous and tried to leave a minimal footprint around the house. The job was done well and priced very fairly."
"3 Sons is my go to for my home and our rental properties. This team is the best I've used in the Charleston area and I wouldn't go anywhere else."
Why Charleston families trust My Three Sons HVAC
Ready for relief? Let's get your home comfortable again.
Honest AC repair, heat pump service and replacement for Mount Pleasant homes, from a local, family-owned team.
Mount Pleasant HVAC FAQ
Do you offer AC repair in Mount Pleasant, SC?
Yes. My Three Sons HVAC provides AC repair, heat pump service, ductless mini-splits and system replacement throughout Mount Pleasant, including the 29464, 29466 and 29429 zip codes.
Why does salt air matter for my AC in Mount Pleasant?
Salt air speeds up corrosion on outdoor coils, fins and electrical connections, especially near the harbor, the marsh and the beaches. Corroded coils can leak refrigerant and reduce cooling, so they're worth checking during regular maintenance.
Why does my Mount Pleasant home feel humid even with the AC on?
The most common causes are an oversized system that shuts off before removing moisture, a clogged condensate drain, or leaky ductwork pulling in humid attic air. A technician can check all three.
Which Mount Pleasant neighborhoods do you serve?
All of them, including Rivertowne, Hamlin Plantation, Oyster Point, Brickyard Plantation, Dunes West, Carolina Park, I'On and the Old Village.
Where is My Three Sons HVAC located?
Our shop is at 5809 N Rhett Ave in Hanahan, SC, a short drive to Mount Pleasant by I-526. We're locally owned and serve the whole Charleston area.
My Three Sons HVAC Around The Lowcountry
We love working in the Lowcountry and keeping Charleston area families cool & comfortable year round.
Why My Three Sons Heating And Air?
HVAC installations, repairs, replacements and most maintenance aren't something the average homeowner near Mount Pleasant should perform themselves.
Built upon our core values of honesty, integrity and kindness, we aim to be your trusted, local heating and air company for all of your residential heating and air conditioning needs.
