AC Repair in Hattiesburg, Mississippi
AC repair in Hattiesburg starts near $140 for a simple fix and can reach $640 for after-hours calls or major parts. A typical bill is closer to $420.
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Hattiesburg Weather and HVAC Load
NOAA's 1991-2020 climate normals put Hattiesburg at 1,922 heating degree days and 2,439 cooling degree days per year. Neither season dominates in Hattiesburg. That balance is a big reason heat pumps and dual-fuel systems sell well in Mississippi. A normal year brings 32 nights at or below freezing and 85 days over 90°F. On the cooling side, a 2,000 sq ft house here usually needs around 3.5 tons. A tight, well-insulated house may get by with half a ton less.
| Heating degree days / year | 1,922 |
|---|---|
| Cooling degree days / year | 2,439 |
| Nights at or below 32°F | 32 |
| Days above 90°F | 85 |
| Average low / high | 55.4°F / 77.3°F |
Hattiesburg Housing Stock
Half the homes in Hattiesburg were built before 1980 (Census ACS median), so the typical house is about 46 years old. A lot of these homes are on their second or third system by now. The ductwork is usually original, and leaky joints are common. Hattiesburg has roughly 7,400 owner-occupied homes, or 36.5% of households. The median home value is $153,600, and median household income is $44,140. We use both figures to adjust labor and pricing for this page.
Forrest County had 13 hail days and 32 days with damaging thunderstorm winds from 2020 through 2025, according to NOAA storm records. The largest hail reported was 1.75 inches across. Hail flattens the thin aluminum fins on condenser coils and cuts airflow. After a big storm, take a look at the outdoor unit; homeowners insurance often covers the damage. Forrest County also had 5 tornado days in that period.
Symptoms Worth a Service Call
- The outdoor unit hums, but the fan doesn't spin
- Water pooling around the indoor unit
- The AC runs, but the air coming out is warm
- The system cycles on and off every few minutes
- Ice on the refrigerant lines or the indoor coil
What Moves the Price
- Whether the equipment sits in a tight attic or on a roof
- The service call or diagnostic fee
- Nights, weekends and holidays
- The part: a capacitor costs a fraction of a fan motor, and a compressor costs far more than both
- Refrigerant type and how many pounds it takes
For Hattiesburg we lowered the national figures about 8%, based on local income, home values and climate-based equipment sizing. Get at least three written quotes; real bids can land outside this range.
What the Quote Should Cover
- Replacing the failed part
- Clearing the drain line if it's clogged
- Checking refrigerant pressures
- A test run
- Diagnosis and electrical testing
Mississippi Licensing and Efficiency Rules
Mississippi is in the DOE's Southeast region, where new split central air conditioners need at least 14.3 SEER2 (13.8 SEER2 for systems of 45,000 BTU/h and up). Most repairs don't need a permit. Anyone who opens the refrigerant circuit does need EPA Section 608 certification, and in Mississippi the company should carry a state license or registration. Ask for both.
Before You Hire
- Swap the air filter and check the breaker before you call anyone.
- If the compressor is gone on an older unit, get a replacement quote before you pay for the repair.
- Ask for the per-pound refrigerant price before any work starts.
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AC Repair Questions from Hattiesburg Homeowners
What does AC repair cost in Hattiesburg?
Most bills land between $140 and $640, including the service call. A typical visit is about $420. Night and weekend calls cost more.
Why is my AC freezing up?
Usually poor airflow, from a dirty filter or coil, or low refrigerant from a leak.
What is the most common AC repair?
A failed run capacitor. The part is cheap, and the swap usually takes less than an hour.
AC Repair Near Hattiesburg
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Hattiesburg; NOAA Storm Events Database 2020-2025, Forrest County. Prices are our estimates, not contractor quotes. Updated 2026.