HVAC Repair in Lexington, 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 Lexington County will get in touch.
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Ten months of work a year, with hard summers and cold nights
Your system in Lexington County works most of the year. Heat runs November through March, and cooling runs May through September, leaving only a short stretch when it gets to rest.
Summer afternoons here average 91°F, so the compressor runs long hours to keep the house down. Winter nights average 36°F, cold enough that the heat cycles on and off through the night to hold steady. Most homes here heat with electricity, so a failing heat strip or a struggling heat pump shows up as a house that will not warm up. The area also sees a lot of wind, 325 damaging wind events over the past ten years, and the outdoor unit sits through all of it. When the power drops, as it did for close to half the households in the state last year, the system needs to come back on its own once it's restored.
- 5 months
- November through March, your system heats
- 5 months
- May through September, it cools
- 36°F
- the average winter night it heats against
- 91°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
- Why is my heat not working?
- Start with the thermostat. Make sure it is set to heat and set a few degrees above the room temperature, and check that it has power if it uses batteries. If the thermostat looks right, check your breaker panel for a tripped switch, since a furnace or heat pump that loses power will not run at all. With winter nights here dropping to 36°F on average, a system that sits dead for even a few hours can let a house get cold fast, so if the breaker is fine and you still have no heat, it is worth getting a contractor out rather than waiting.
- Why is my system running but not cooling the house?
- Check the air filter first. A filter clogged with dust blocks airflow across the coil, and when that happens the coil can freeze up and stop cooling the air even though the blower keeps running. Look at the outdoor unit too. If the fan outside is not spinning or the coil is covered in ice, that points to the same airflow problem or a refrigerant issue, and running the system longer will not fix it. On a 91°F afternoon a struggling system falls behind quickly, so if the filter is clean and the outdoor unit still is not doing its job, have someone look at the refrigerant charge and the coil.
- What can I check before calling for HVAC repair?
- Check the thermostat settings and batteries, then check the breaker panel for anything tripped. Look at the air filter and replace it if it is gray or clogged, since a dirty filter causes problems in both winter and summer. For a furnace, see if the pilot light or igniter display shows an error code, and for an outdoor unit, check that nothing is blocking the airflow around it, like leaves or a fence panel too close to the coil. If your power went out recently, some systems need the thermostat reset even after power comes back, so try that before assuming the equipment itself failed. Beyond these checks, a contractor will need to look at the equipment directly to diagnose anything further.