Furnace Repair in Morristown, TN
Furnaces here run from October through April. If yours quits, tell us what it's doing and a licensed contractor who covers Hamblen County will get in touch.
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Seven months of heat puts real wear on a furnace here
From October through April your furnace is what stands between you and a 30°F night. It cycles on and off over and over through those months, and most homes in Hamblen County heat with electricity, so when the power goes out, the furnace goes with it. In 2024, that happened to 20% of Tennessee households for at least a day.
Hamblen County has seen 19 winter storms and 59 damaging wind events over the past ten years. Storms like that cut power and put ice and wind on the outside unit. When a furnace comes back on after an outage, that is often when a worn part finally gives out. If yours will not restart, will not stay lit, or blows cold air, that is usually what you are dealing with.
- 7 months
- October through April, your furnace is on duty
- 30°F
- the average winter night it heats against
- 19 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 to the furnace has been interrupted. Check that the thermostat is set below room temperature and has working batteries, and check the breaker for the furnace along with any switch that looks like a light switch near the unit itself. If those are fine, the igniter may have failed or the flame sensor may be dirty, and either one will keep the furnace from firing even though power is reaching it. With winter lows around 30°F here, it's worth having this looked at quickly rather than waiting.
- Why is my furnace blowing cold air?
- If the blower is running but the air isn't warm, the furnace may be stuck on fan-only mode, so check that the thermostat is set to heat and not just fan. A clogged filter can also starve the burner of airflow and trip a safety switch that shuts off the flame while the blower keeps running. If the filter is clean and the setting is right, the igniter or gas valve may not be working, and that calls for a contractor to check it directly.
- Why won't my furnace pilot light stay lit?
- A pilot light that won't stay lit is usually a sign the thermocouple has worn out and is no longer sensing the flame correctly, so the safety valve shuts the gas off. It can also mean a draft is blowing the flame out, or the pilot orifice is partly clogged. Most newer furnaces don't use a standing pilot at all, so if yours has one, it's likely an older unit and the thermocouple is a common wear part worth having replaced.