Furnace Repair in Maryville, TN
Furnaces here run from October through April. If yours quits, tell us what it's doing and a licensed contractor who covers Blount County will get in touch.
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Seven months of winter work on your furnace
Your furnace in Blount County runs from October through April, seven months of the year. On nights that average 31°F through December through February, it cycles on and off for hours at a stretch to keep the house warm. Each cycle puts a load on the igniter and the parts that get the burner started, and that is usually where trouble shows up first, as a furnace that will not light or shuts off partway through a cycle.
Most homes here heat with electricity, and the county has seen 20 winter storms and 107 damaging wind events over the past ten years. When wind takes down power in the middle of a cold night, a furnace that was already struggling has one more reason to fail right when you need it most.
- 7 months
- October through April, your furnace is on duty
- 31°F
- the average winter night it heats against
- 20 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 it's the thermostat, the power supply, or the igniter. Check that the thermostat is set to heat and above room temperature, and check the breaker for the furnace. If those are fine, the igniter may have failed, or a safety switch may be holding the furnace off because of an airflow or venting problem. A contractor can test each part and find which one it is.
- Why is my furnace blowing cold air?
- The furnace may just be starting a cycle. Furnaces push out cool air for a short stretch while the heat exchanger warms up, so if it turns warm within a minute or two, that's normal. If the air stays cold, the igniter or gas valve may not be lighting the burners, or the thermostat fan setting may be stuck on. A dirty filter can also block warm air from reaching the vents. A contractor can check the burners and the filter to find the cause.
- Why won't my furnace pilot light stay lit?
- A weak or dirty thermocouple is the usual reason. The thermocouple senses the pilot flame and keeps gas flowing to it. If it's worn out or coated in residue, it shuts the gas off even with the pilot burning. A draft blowing across the pilot or a clogged pilot orifice can cause the same problem. This isn't something to keep relighting on your own. A gas furnace with a repeat pilot problem needs a contractor to look at the thermocouple and the gas line.