Furnace Repair in Hendersonville, TN
Furnaces here run from October through April. If yours quits, tell us what it's doing and a licensed contractor who covers Sumner County will get in touch.
Tell us about the job
It takes about a minute.
Seven months of heat, and power that doesn't always stay on
Your furnace works from October through April in Hendersonville. Winter nights average 30°F from December through February, so the burner is lighting and shutting off night after night for months. Each cycle puts a little more wear on the igniter and the flame sensor, the parts that have to work every time the thermostat calls for heat.
Most homes here heat with electricity, and the power does not always stay on. 20% of Tennessee households went at least 24 hours without power in 2024, and Sumner County has seen 13 winter storms and 151 damaging wind events over the past ten years. When the power drops, the furnace stops with it, and it needs to come back on correctly once the lights do.
- 7 months
- October through April, your furnace is on duty
- 30°F
- the average winter night it heats against
- 13 winter storms
- in ten years, the nights a failure hurts most
NOAA nClimDiv, 1991–2020 normals
- Why won't my furnace turn on?
- Most often the thermostat isn't calling for heat the way you think it is, or power isn't reaching the furnace. Check that the thermostat is set above room temperature and has fresh batteries if it takes them. Next check the furnace switch, which looks like a light switch near the unit, and the breaker at your panel. If those are fine, the igniter or a safety switch inside the furnace may be the problem, and that's a job for a contractor to diagnose.
- Why is my furnace blowing cold air?
- A furnace blows cold air for a few seconds when it first starts, while it clears old air from the ducts before the burners kick in. If it keeps blowing cold the whole time it runs, the igniter may be failing to light the burners, or the flame sensor is shutting the burners off right after they start. Check your air filter too, since a clogged one can starve the burners of the airflow they need to stay lit. A furnace that runs but never warms up needs a contractor to look at the burner assembly.
- Why won't my furnace pilot light stay lit?
- If the pilot lights but goes out again, the thermocouple is usually the cause. It's the small sensor that sits in the pilot flame and tells the gas valve the flame is real. When it wears out or sits out of position, the gas valve shuts off the pilot supply as a safety measure. A contractor can test and replace it. If your furnace doesn't have a pilot light at all, it uses an electronic igniter instead, and a different repair applies.