HVAC Repair in Kingsport, TN
Homes here need heat from October through April and cooling from June through September. If your system quits, tell us what it's doing and a licensed contractor who covers Sullivan County will get in touch.
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Eleven months of running, in Sullivan County heat and cold
Your system works nearly all year here. Heat from October through April, cooling from June through September, only one month off in between. That is eleven months of parts turning on and wearing down.
Winter nights average 29°F, cold enough that the furnace cycles on and off for hours at a stretch, and each cycle puts a little more wear on the igniter and the parts that get it lit. Summer afternoons average 85°F, which keeps the compressor working long hours to keep up. Most homes here heat with electricity, so when the power goes out, the heat goes with it. Sullivan County has logged 29 winter storms and 58 damaging wind events over the past ten years, and in 2024, 20% of Tennessee households went at least 24 hours without power. When the system comes back on after an outage, it is often the strain of that restart that shows you what was already close to failing.
- 7 months
- October through April, your system heats
- 4 months
- June through September, it cools
- 29°F
- the average winter night it heats against
- 85°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's set to heat and the set temperature is above room temperature, since a setting bumped by accident is the simplest fix. If that's not it, check your breaker panel for a tripped breaker, since furnaces and heat pumps both run on electricity even when the heat itself comes from gas. If the breaker's fine and you still have no heat, and it's a gas furnace, listen for the igniter trying to light. A furnace that tries to start but shuts back down is often telling you the flame sensor needs cleaning or the igniter is failing, and that's a job for a contractor to diagnose.
- 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 air can't move past it the coil can ice over, which makes the problem worse the longer the system runs. Next check the thermostat is set to cool, not fan only, since fan only just moves air without cooling it. If the filter is clean and the thermostat is set right, the system may be low on refrigerant or the outdoor unit may be blocked by leaves or debris, and either of those needs a contractor to look at.
- What can I check before calling for HVAC repair?
- Check the thermostat first, since the wrong mode or a battery that's died accounts for a lot of no-heat and no-cool calls. Check your breaker panel next, since a tripped breaker will stop a furnace, heat pump, or air conditioner cold even though the rest of the house has power. Check the air filter and replace it if it's dark with dust, because restricted airflow causes problems in both summer and winter. If the system still isn't working after that, a contractor will need to look at it directly.