Overhead view of an outdoor AC condenser unit on a concrete pad next to a house with a dark shingle roof.

AC Maintenance in Charleston, SC

Air conditioners here run from May through October, so April is the time for a tune-up. Tell us about your system, and a licensed contractor who covers Charleston County will get in touch.

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment

What kind of equipment?*

Aerial view of a gray outdoor air conditioning condenser unit mounted on a concrete pad next to a house with vinyl siding.

Six months of Charleston heat wears on a system that never gets to rest

From May through October your air conditioner is working almost every day, and on afternoons that average 89°F it runs long stretches just to hold the house steady. That kind of runtime adds up on the parts that keep the system cool and moving, the condenser coil and the fan that pulls air across it.

A tune-up before the season gets going checks the parts summer leans on hardest. A coil caked with pollen or dust cannot shed heat the way it should, and a fan motor under strain runs hotter than it needs to. Catching that early is the difference between a system that gets through October fine and one that fails partway there.

6 months: May through October, your air conditioner is on duty
89°F: the average summer afternoon it cools against
61 hail events: in ten years, and hail bends the fins on outdoor coils
304 wind events: in ten years, and wind drives debris into outdoor units

Isometric line illustration of a cutaway house showing interior rooms with furniture, ceiling ductwork, an indoor air handler, and an outdoor condenser unit connected by lines.

Your air conditioner works hardest from June through September.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

NOAA nClimDiv, 1991–2020 normals

An overhead view of a residential air conditioning condenser unit mounted on a concrete pad next to a house with vinyl siding.

Book your AC tune-up in April, before homes here start needing cooling in May.

A tune-up checks the refrigerant charge, cleans the coils, tests the capacitor and tightens the electrical connections.

What does AC maintenance include?: A contractor checks refrigerant pressure, cleans the outdoor coil, tests the capacitor, and inspects electrical connections for wear. They will also change or check the filter and look at the condensate drain, since a clogged drain can back up and cause water damage. Each of these can cause a breakdown on its own, which is why a real inspection covers all of them rather than just one.
How often does an air conditioner need maintenance?: Once a year, ideally before the cooling season starts. Homes here run the AC May through October, six months straight, so getting it checked in spring gives a contractor time to catch a weak capacitor or low refrigerant before the system has to work through an 89°F afternoon.
Is AC maintenance worth it?: Yes, because it catches small problems before they become breakdowns. A worn capacitor or a dirty coil makes the system work harder, and that strain adds up over a six-month cooling season. It also gives a contractor a chance to check the electrical connections, which matters here since this area sees frequent storms and wind that can loosen or damage outdoor units.

Find a contractor