Furnace Repair in Sioux Center, IA
Furnaces here run from October through May. If yours quits, tell us what it's doing and a licensed contractor who covers Sioux County will get in touch.
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Eight months of heat, nights near 11 below zero
Your furnace works October through May here, eight months of the year. On winter nights that average 11°F, it runs long and often, and the burner cycles on and off for hours at a stretch. That kind of run time wears on the igniter and the flame sensor first, since those are the parts working every time the burner fires.
Sioux County has had 37 winter storms in the last ten years, along with 67 damaging wind events. Storms like that knock out power, and across Iowa, 15% of households lost power for at least 24 hours in 2024. When the power comes back, a furnace with a bad igniter or a failed control board will not restart on its own. If your house is cold and the furnace will not fire back up after an outage, that is usually where to look.
- 8 months
- October through May, your furnace is on duty
- 11°F
- the average winter night it heats against
- 37 winter storms
- in ten years, the nights a failure hurts most
NOAA nClimDiv, 1991–2020 normals
A new furnace would cut about $120 a year off heating for a typical Sioux County home.
Estimates for a typical Sioux County home, compared with an older unit built to the previous federal minimum, from EIA household energy data, Iowa fuel prices and NOAA climate normals. Your home will differ.
Repair makes sense when one part has failed and the heat exchanger is sound.
Replacement makes sense when the heat exchanger is cracked or the furnace keeps needing parts.
Iowa requires HVAC contractors to hold a state license.
That license comes from the Iowa Plumbing and Mechanical Systems Board, and it covers the contractor, not the individual job. The board puts the contractor on record, and that record follows them across every job they take, not just this one.
Because Iowa licenses at the contractor level, that license is the thing accountable for the repair on your furnace. Furnace repair means gas connections, and a bad one is the dangerous part of the job. In Sioux County, close to half of homes heat with gas, so this is the kind of work the state's licensing exists to stand behind.
Sources: Iowa Legislature · Iowa Department of Inspections, Appeals and Licensing
- Why won't my furnace turn on?
- Most often the thermostat isn't calling for heat, a safety switch has tripped, or power isn't reaching the unit. Check that the thermostat is set below room temperature and has working batteries. If the furnace still won't start, look at the breaker panel and the furnace's own power switch, which is often mistaken for a light switch near the unit. A clogged filter can also cause the furnace to shut itself off before it starts a heating cycle, since it trips a safety switch meant to protect the heat exchanger.
- Why is my furnace blowing cold air?
- If air is blowing but it's not warm, the burners may not be igniting even though the blower is running. The blower and the burners are controlled separately, so the fan can run on its own while the heating part fails. A dirty flame sensor or a bad igniter are common reasons the burners won't light. It can also mean the furnace is in the middle of its startup sequence, when a few seconds of cool air is normal before the burners catch.
- Why won't my furnace pilot light stay lit?
- This usually points to the thermocouple, the small sensor that tells the gas valve a flame is present. When it wears out or sits out of position, it reads no flame even when one exists, and the gas valve shuts off to protect the home. A draft near the pilot or a dirty pilot orifice can cause the same problem. Since this involves the gas valve, it's worth having a licensed contractor check it rather than repeatedly relighting it.