HVAC Repair in Sumter, SC
Homes here need heat from November through March and cooling from May through September. If your system quits, tell us what it's doing and a licensed contractor who covers Sumter County will get in touch.
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Ten months of work, most of it in the heat
Sumter County asks for cooling from May through September and heat from November through March. That's ten months a year your system is running, with only a short break in spring and fall. Summer afternoons average 90°F, and the compressor and fan motor carry that load day after day. That kind of steady run time wears on capacitors and contactors, the parts that get the compressor started and keep it running, and when one goes the air stops blowing cold with little warning.
Winter here is shorter but still real. Nights average 36°F from December through February, cold enough that a heat pump or furnace has to cycle through the night to keep up. Most homes in the county heat with electricity, so when a storm knocks out power, the heat goes with it. The area has seen 182 damaging wind events and 8 winter storms over the past ten years, and close to half of South Carolina households lost power for at least a day in 2024. A system that comes back on rough after an outage, or doesn't come back on at all, is worth a look before the next one hits.
- 5 months
- November through March, your system heats
- 5 months
- May through September, it cools
- 36°F
- the average winter night it heats against
- 90°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
- Why is my heat not working?
- Most often it is the thermostat, a tripped breaker, or a furnace that will not ignite. Check the thermostat is set to heat and above room temperature, and look at the breaker panel for anything tripped. Most homes here heat with electricity, so a tripped breaker will cut the system off completely. When those check out and you still have no heat, that points to something a contractor needs to look at, like an igniter or a control board.
- Why is my system running but not cooling the house?
- The system is moving air but not taking the heat out of it, which usually means the filter, the outdoor unit, or the refrigerant charge. A clogged filter starves the system of airflow, so check it first and replace it if it looks gray or packed with dust. Next look at the outdoor unit and clear away any leaves, grass clippings, or anything blocking the coil. If the air coming from the vents is only a little cool or not cool at all on a 90 degree afternoon, the system likely needs a contractor to check the refrigerant charge or the coil itself.
- What can I check before calling for HVAC repair?
- Start with the thermostat. Make sure it is set correctly, has fresh batteries if it takes them, and is actually calling for heat or cooling. Check the breaker panel for anything tripped, since a storm or a power blip can knock a breaker without you noticing. Look at the air filter and swap it if it is dirty, since a blocked filter can cause problems that look like bigger issues. If your system has an outdoor unit, walk out and make sure nothing is blocking it. If you have done all that and the system still is not working right, a contractor can take it from there.