HVAC Repair in Sumrall, MS
Homes here need heat from November through March and cooling from May through October. If your system quits, tell us what it's doing and a licensed contractor who covers Lamar County will get in touch.
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Eleven months of work a year on your system in Sumrall
Your system in Sumrall gets almost no rest. Cooling runs May through October, and heat takes over from November through March, so eleven months out of the year something is cycling on. Summer afternoons averaging 91°F push the compressor hard, day after day, and that steady load wears on it over the years. Winter nights averaging 40°F are not brutal, but the system still cycles through the night to hold the house, and most homes here heat with electricity, often leaning on a heat strip or a heat pump to do it.
Sumrall has seen 101 damaging wind events and 3 winter storms over the past ten years, and across Mississippi about 3 in 10 households lost power for at least a day in 2024. Most systems restart on their own once power comes back, but a surge from the outage can be hard on the control board. If your thermostat is dark or the outdoor unit will not kick on after the lights come back, that is usually where to look first.
- 5 months
- November through March, your system heats
- 6 months
- May through October, it cools
- 40°F
- the average winter night it heats against
- 91°F
- the average summer afternoon it cools against

NOAA nClimDiv, 1991–2020 normals
Mississippi requires HVAC contractors to hold a state license.
The license comes from the State Board of Contractors, and Mississippi ties it to the contractor, not to each job. It is a record that this contractor holds a state license, not a check on any one repair.
For a heating and cooling repair in Lamar County, that license is what stands behind the person working on your system. It tells you the state has tested this contractor and keeps a record of them. It does not speak to any one job, only to the contractor doing it.
Source: Mississippi State Board of Contractors
- Why is my heat not working?
- Most often it is the thermostat, the power to the unit, or the igniter. Check that the thermostat is set to heat and the temperature is above room temperature. If you have a gas furnace, check that the pilot light or igniter is doing its job. If the breaker has tripped or a fuse is blown, that will also stop it cold. With most winter nights here dropping to 40°F, a furnace that will not start is worth checking the same day.
- Why is my system running but not cooling the house?
- The system is running but something between the unit and your rooms is not doing its job. A dirty filter blocks airflow and can freeze the coil, so check that first. Low refrigerant, a failing compressor, or blocked ducts can also keep cool air from reaching the house. Afternoons here can hit 91°F, so a system that runs without cooling needs attention fast.
- What can I check before calling for HVAC repair?
- Check the thermostat settings first, since a wrong setting or dead batteries can look like a bigger problem. Check the breaker panel for a tripped switch. Look at the filter and replace it if it is dirty. If the outdoor unit has power but is not running, check for debris or ice around it. A contractor will diagnose anything beyond these basics and price the repair for your system.

