Heat Pump Repair in Biloxi, Mississippi
Heat pump repair in Biloxi starts near $170 for a simple fix and can reach $850 for after-hours calls or major parts. A typical bill is closer to $540.
Biloxi Weather and HVAC Load
Biloxi logs 1,457 heating degree days and 2,754 cooling degree days in a normal year, based on the closest NOAA weather station. Cooling carries most of the load, which is why compressors and condenser fan motors wear out faster here than in northern cities. A normal year brings 11 nights at or below freezing and 52 days over 90°F.
| Heating degree days / year | 1,457 |
|---|---|
| Cooling degree days / year | 2,754 |
| Nights at or below 32°F | 11 |
| Days above 90°F | 52 |
| Average low / high | 60.6°F / 76.3°F |
Biloxi Housing Stock
The median Biloxi home dates to 1990, according to the Census ACS. That makes the typical house about 36 years old. Plenty of houses from this period still run original 1990s or early-2000s equipment, which is past its expected service life. Biloxi has roughly 9,600 owner-occupied homes, or 48.6% of households. Homes here have a median value of $203,200 and households a median income of $55,958. Those two numbers drive the labor adjustment in our estimate.
Between 2020 and 2025, NOAA's Storm Events Database logged 10 hail days and 21 days with damaging thunderstorm winds in Harrison County. The largest hail reported was 2 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. Harrison County also had 9 tornado days in that period.
Symptoms Worth a Service Call
- Grinding or loud buzzing from the outdoor unit
- Cool air coming out in heating mode
- The backup heat runs nonstop
- Ice builds up on the unit and doesn't melt off
What Moves the Price
- Emergency or after-hours service
- Finding and fixing a refrigerant leak, then recharging
- Which part needs replacing: a reversing valve, defrost board or sensor
- Whether the parts warranty still covers it
- The diagnostic fee
For Biloxi we kept the national figures close to unchanged, 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
- Checking refrigerant pressures
- A full test run
- Replacing the failed parts
- A defrost cycle test
- Diagnosis in both heating and cooling mode
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
- Book maintenance twice a year, once before summer and once before winter.
- Light frost on the outdoor unit in winter is normal. A solid block of ice is not.
- Many heat pumps carry a 10-year parts warranty if they were registered. Find out whether yours was.
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Heat Pump Repair Questions from Biloxi Homeowners
What does heat pump repair cost in Biloxi?
Most bills land between $170 and $850, including the service call. A typical visit is about $540. Night and weekend calls cost more.
Is it normal for a heat pump to freeze?
A thin layer of frost in winter is normal, and the defrost cycle should clear it. Heavy ice that stays usually means a defrost control or airflow problem.
Why is my heat pump blowing cold air?
For a few minutes during a defrost cycle, that's normal. If it keeps going, the usual causes are a stuck reversing valve, low refrigerant or a thermostat set to the wrong mode.
Heat Pump Repair Near Biloxi
- Gulfport $170 to $800
- Hattiesburg $160 to $780
- Southaven $180 to $880
- Jackson $160 to $790
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Biloxi; NOAA Storm Events Database 2020-2025, Harrison County. Prices are our estimates, not contractor quotes. Updated 2026.