Furnace Repair in Greeneville, TN
Furnaces here run from October through April. If yours quits, tell us what it's doing and a licensed contractor who covers Greene County will get in touch.
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Seven months of heat puts real wear on a furnace here
In Greene County your furnace runs from October through April. Winter nights average 30°F from December through February, so the burner is cycling on and off most nights for months at a time. Every cycle is a start, and the igniter and other parts that fire the burner take the wear from each one.
Most homes here heat with electricity, and Tennessee saw plenty of power interruptions last year. When the power blinks off and back on, a furnace that was already struggling to light can fail to start again. If your furnace runs rough some nights and won't fire on others, that pattern is worth paying attention to before a cold snap makes it worse.
- 7 months
- October through April, your furnace is on duty
- 30°F
- the average winter night it heats against
- 25 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 it should, or power to the furnace has been cut off somewhere. Check that the thermostat is set below room temperature and has fresh batteries if it uses 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 have failed, and that needs a contractor to check.
- Why is my furnace blowing cold air?
- If the air feels cool at first, that's normal. The furnace pushes air through the ducts before it's fully heated, so the first minute or two can feel cold. If the air stays cold the whole time it's running, the burners may not be lighting even though the blower is, and that points to an ignition problem or a gas supply issue. A dirty filter can also choke off airflow enough to trip the furnace's limit switch, which shuts the burners off but leaves the blower running. Either way, a contractor needs to look at it.
- Why won't my furnace pilot light stay lit?
- The thermocouple is the usual reason. It's a small sensor that sits in the pilot flame and tells the gas valve the pilot is lit. When it wears out or sits slightly out of position, it can't sense the flame anymore, so the gas valve shuts off the pilot supply. A draft blowing across the pilot, or a dirty pilot orifice, can cause the same thing. Since this involves the gas valve, a contractor should be the one to relight it and check the thermocouple.