Furnace Repair in Lebanon, TN
Furnaces here run from October through April. If yours quits, tell us what it's doing and a licensed contractor who covers Wilson County will get in touch.
Tell us about the job
It takes about a minute.
Your furnace works seven months a year here
Lebanon needs heat from October through April. On winter nights averaging 31°F, the burner cycles on and off again and again to hold the temperature, and every one of those cycles puts wear on the igniter. When the igniter finally goes, the furnace won't light at all, and the house starts to cool.
Most homes in Wilson County heat with electricity, so a furnace here depends on the power staying on. Twenty percent of Tennessee households lost power for at least 24 hours in 2024, and the region has seen 11 winter storms and 260 damaging wind events over the past ten years. When the power drops mid-winter, a furnace that was already struggling to keep up may not come back on the way it should.
- 7 months
- October through April, your furnace is on duty
- 31°F
- the average winter night it heats against
- 11 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, or the furnace isn't getting power. Check that the thermostat is set to heat and the temperature is above room temperature. Check the furnace switch, which looks like a light switch near the unit, and check the breaker. If those are fine, the igniter or the flame sensor may have failed, and a contractor will need to test them.
- Why is my furnace blowing cold air?
- The furnace may be running the blower without the burners on, which pushes air that hasn't been heated yet through the vents. This happens for a few seconds at the start of every cycle and is normal. If it lasts longer than that, the igniter or the flame sensor may be failing, so the blower runs but the burners never light. A dirty filter can also cause the furnace to overheat and shut the burners off while the blower keeps running.
- Why won't my furnace pilot light stay lit?
- A pilot light that won't stay lit usually means the thermocouple has worn out. That's the small metal rod next to the flame that senses it's burning and keeps the gas valve open. When it fails, the valve shuts the gas off even though the pilot is lit, or shuts it off soon after. A draft blowing across the pilot or a dirty pilot orifice can also put it out, but a thermocouple that needs replacing is the most common cause.