Commercial HVAC Repair in Charleston, SC
A warm dining room or a dead suite costs you more than comfort. Tell us what the space is doing and when the building is empty, and we will plan around it.
- 4.9★ on Google (16 reviews)
- Open 24 hours, 7 days
- Clear, upfront quotes
Commercial HVAC repair in Charleston starts with one practical question: what has to stay open while the fault gets found? Aero Air Techs is an HVAC contractor serving homes and small businesses, and this page covers the light commercial equipment in offices, shops, restaurants, churches and small multi-tenant buildings.
The heat gives these systems little rest. North Charleston reached 90°F or higher on 71 days in 2025, by the National Weather Service count. A package unit that struggled in May tends to fail in July, with customers in the room.
One note on scope. If your building runs on a central chiller, cooling tower or boiler plant, this page is not written for you, and you need a firm set up for large mechanical plants.
Office HVAC repair, retail and restaurant calls: what fails where
The building tells you a lot before anyone opens a panel. Each type has its own pattern.
| Building | What people notice | Where the search starts |
|---|---|---|
| Office | One suite warm, the rest fine | Thermostat, zone damper, branch duct, then the unit serving that suite |
| Retail | Front of the store warm by mid-afternoon | Door traffic, dirty coil, loose belt, failing fan motor |
| Restaurant | Stuffy dining room, doors that pull hard | Air balance with the hood, loaded filters, greasy coils |
| Church | Sanctuary slow to cool on Sunday morning | Thermostat start time, filters, capacity against a full room |
| Small multi-tenant | One tenant out, or two arguing over the setting | Which unit serves which space, shared controls, breakers |
Restaurants deserve a closer look. Greenheck, a ventilation manufacturer, says a hood without enough make-up air leaves the room under negative pressure, which can cut exhaust and let grease and smoke drift into the seating area. So restaurant HVAC trouble is often an air balance problem that looks like a broken AC. We check what the hood is doing before we blame the rooftop unit.
What a commercial AC repair visit includes
You should finish a service call knowing what failed, what it will take and what happens next. A visit covers these items.
- A symptom history. Who noticed it, when it started and what else changed in the space
- Electrical testing. Contactors, capacitors, fan motors, control voltage and safeties
- Airflow checks. Filters, belts, blower, coils and supply temperatures at the space
- Refrigerant readings. Pressures and temperatures where the symptoms point that way
- Drain check. Pans, traps and condensate lines, which clog hard in our humidity
- A clear finding. The cause, the options and a quote you can forward
Commercial heating repair follows the same order. Around here that usually means a gas heat section, a heat pump or electric strips in a package unit, and we test the ignition, safeties or strip circuits the same way we test the cooling side.
What to have ready before you call
A few details shorten the visit and help a technician bring the right parts.
- The number of units and where each one sits: roof, side yard or closet
- Which spaces are affected, and which units serve them, if you know
- Model numbers, or a phone photo of the nameplate if it is easy to reach
- Anything that changed lately, such as a tenant build-out, new kitchen equipment or a storm
- Who holds the keys, and who can approve a quote
Do not send staff onto a roof or into a live panel to find any of this. A rough answer is enough for the first call.
How commercial HVAC repair in Charleston runs, call to restart
A repair in an occupied building needs more planning than one in a house. This is the order we work in.
- Call with the basics. Your address, the type of business, how many units and how the equipment is reached.
- Agree on timing. We tell you when a technician can reach you, and you tell us which hours to avoid.
- Diagnose on site. Testing comes first, because swapping parts in a working restaurant is a costly way to guess.
- Quote before work. You get a line-itemed quote and time to pass it along for approval.
- Make the repair. Parts on hand can often go in on the first visit. Others are ordered by model.
- Restart and check. We run the unit, confirm supply temperatures and go over what we found.
Request a quote
Calling is the fastest way to reach us: (831) 461-3437. If you would rather write it down, send the details here.
Fix it now, nurse it through summer or plan a replacement?
Not every fault deserves the same answer. Here are the three paths we lay out, and when each one fits.
| Path | Fits when | Watch for |
|---|---|---|
| Permanent repair | One failed part on a sound unit | Confirm the coil and compressor are healthy first |
| Stopgap for the season | A larger fault in August, with replacement planned for a slower month | Get the plan in writing so a patch does not become the plan |
| Planned replacement | Repeat failures, a tired compressor or a salt-worn coil | Permits, curb fit, roof work and lead time |
The right call also depends on who owns the risk. A tenant with a year left on a lease and an owner planning to hold for ten will read the same quote differently. We give the facts, and you make that decision.
What moves the price of a business service call?
Several things change the quote more than the size of the building does.
- Access. A roof hatch, a tall ladder or a tight mechanical closet adds time.
- The failed part. A contactor and a compressor are very different jobs.
- Parts lead time. Commercial boards and motors are often ordered by model.
- Number of units. Tracing a fault across several units takes longer than one.
- Timing. If the work has to happen after closing, ask about pricing for that window.
Rules and paperwork that apply to any commercial job
Three items are worth knowing before you hire anyone.
Licensing. South Carolina's LLR oversees contractors, and its Contractor's Licensing Board covers commercial mechanical work. Before work starts, get the license number from whoever you hire and run it through the state lookup.
Refrigerant. Federal law under EPA Section 608 prohibits venting refrigerant, and anyone who handles it must hold a technician certification. Ask to see that card from whoever services your equipment.
Warranties. If a unit is fairly new, pull the model and serial number and ask the manufacturer what the parts coverage says, including whether labor is included. Replacement work may need a permit, and each town and county sets its own process.
Regular visits catch much of this early. See commercial HVAC maintenance and our preventive maintenance checklist for property managers.
Why business owners call Aero Air Techs
Judge us by what customers wrote and how the first call goes.
- Rated 4.9 on Google across 16 reviews, checked in October 2026.
- Open around the clock, going by our Google Business Profile.
- A quote before the work, so your owner or board sees the number first.
- Repeat work. Tiffany F. wrote, "We will continue to use him at Abyssinia Baptist Church."
“We have used Rodriquez Washington and the company several times and he does an awesome job! He is honest and takes his time with us. We will continue to use him at Abyssinia Baptist Church.”
“Chris came out to check out my ac unit And found the problem in 5 min and fixed It now I'm back cool, price was affordable He's my guy from now on, Thanks Chris”
“We called Cris and he came right over. He was knowledgeable about our unit and fixed it in a matter of minutes. His professionalism was top notch and we will be calling him for any AC issues moving forward. Highly recommended. I wish I could give more than 5 stars!”
4.9 out of 5 from 16 Google reviews (checked October 2026). Read more reviews · Leave a review
Our base is Charleston, and our commercial calls reach places such as North Charleston, Hanahan, Goose Creek and Summerville. If a unit has quit outright, go to emergency AC repair. Equipment on the roof has its own page, rooftop unit service.
Business hours, access and trip time all change with the address. Have the unit tag ready when you call.
- North Charleston: about 22 minutes, and the city runs its own mechanical permits if a repair becomes a change-out.
- Hanahan: about 18 minutes, the shortest trip when a shop or office cannot wait.
- Goose Creek: about 30 minutes. Keep your city business details handy for any permit work.
- Summerville: about 34 minutes, with I-26 setting the pace at shift change.
- Mount Pleasant: about 25 minutes. Roof units near the water may show salt damage before age.
- James Island: about 20 minutes. Ask us to check whether the building is in the Town, the city or the county.
- Johns Island: about 28 minutes, so a closing-time repair needs an early call.
- Ladson: about 26 minutes from Exit 203 on I-26, and the county line matters for paperwork.
Questions about this service
Can a repair happen around our business hours?
Often, and the first call is where that gets sorted out. Tell us when you open, when the building empties and which space is affected. Google lists us as open 24 hours, so an early or late visit may be possible. Ask about pricing and timing for that window before you book, because a Charleston restaurant and a downtown office have very different quiet hours.
Do you repair rooftop units on small commercial buildings?
Yes. Package units on strip retail and small office roofs are part of rooftop unit service. Before the visit, let us know how the roof is reached, who holds the hatch key and how many units serve the space. That detail tells us what to bring and how long the access will take on your building.
Do you work on chillers or large central plants?
Those sit outside the scope of this site. Our commercial pages cover light commercial equipment such as package units, split systems and ductless systems. Chillers, cooling towers and boiler plants are a separate specialty. If your building runs on one of those, look for a mechanical firm set up for that work, and check its record through the state's Contractor's Licensing Board lookup.
Who pays for the repair, the landlord or the tenant?
Your lease decides that, and small commercial leases around Charleston vary a lot. Read the HVAC clause before the service call if you can, since some leases move repairs to the tenant and keep replacement with the owner. Tell us who approves the work so the quote goes to the right person the first time.
How do I check a commercial HVAC contractor in South Carolina?
Ask for the license number and look it up on the SC LLR lookup. LLR's Contractor's Licensing Board oversees commercial mechanical work, so confirm the record fits the job in front of you. Our guide on choosing an HVAC contractor lists more questions to ask any company before you sign.
How much does commercial HVAC repair cost?
It depends on the failed part, the unit's size, how hard the roof or mechanical room is to reach and when the work happens. We do not post prices, because two units that look alike can have very different faults. You get a clear, upfront quote before work begins, which you can pass to your owner or board.
