Furnace Repair in Danville, IL
Furnaces here run from October through May. If yours quits, tell us what it's doing and a licensed contractor who covers Vermilion County will get in touch.
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Eight months of heat in Danville takes its toll
Your furnace runs from October through May here, eight months a year. On winter nights that average 21°F, it cycles on and off for hours to keep the house warm, and every start puts wear on the igniter and the parts that control the flame. Older units feel that wear first, usually as a slow start or a burner that will not light at all.
Vermilion County has had 7 winter storms and 163 damaging wind events over the past ten years, and statewide, 16% of households lost power for a day or more in 2024. A furnace that loses power mid-cycle does not always come back on by itself. If yours has been slow to light, cycling short, or not starting after the power blinks, that is what this season does to a furnace here.
- 8 months
- October through May, your furnace is on duty
- 21°F
- the average winter night it heats against
- 54%
- of homes here heat with gas, so most furnaces here burn gas
- 7 winter storms
- in ten years, the nights a failure hurts most
NOAA nClimDiv, 1991–2020 normals
A new furnace would cut about $140 a year off heating for a typical Vermilion County home.
Estimates for a typical Vermilion County home, compared with an older unit built to the previous federal minimum, from EIA household energy data, Illinois 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.
In Illinois, HVAC licensing for homes is left to the cities and towns.
Illinois doesn't test or license HVAC contractors at the state level, so whatever protection exists depends on the town. Some cities in Vermilion County may require something of a contractor doing furnace work, others may not. There's no statewide list to check and no state exam behind the person showing up at the door.
What actually matters on a gas furnace repair is the gas connection itself, since that's the dangerous part if it's done wrong. Illinois doesn't put a state body behind checking that, so whether anyone does depends entirely on the town the house sits in. Just over half of Vermilion County homes heat with gas, so this is a repair a lot of households here will need at some point, with oversight that changes from one town to the next.
Source: Illinois General Assembly
- Why won't my furnace turn on?
- Most often the thermostat isn't calling for heat the way it should, or power isn't reaching the furnace. Check that the thermostat is set below room temperature and has fresh batteries if it uses them. Next check the furnace switch, the one that looks like a light switch near the unit, and the breaker for it in your panel. If those are fine, the igniter or the flame sensor may have failed, and that's a job for a contractor to test and replace.
- Why is my furnace blowing cold air?
- Usually this means the blower is running before the burners have caught, which is normal for a short stretch after the furnace starts. If cold air keeps coming for more than a few minutes, the igniter may not be lighting the burners at all, or the gas valve isn't opening. A dirty filter can also starve the burners of airflow and trip a safety switch that stops the flame while the blower keeps going. Check the filter first, and if it's clean, have a contractor look at the ignition system.
- Why won't my furnace pilot light stay lit?
- This usually means the thermocouple, the small sensor that tells the gas valve a flame is present, has worn out or is out of position. It can also happen if there's a draft near the pilot or a partial blockage in the pilot tube. A standing pilot doesn't use electricity, so a power outage isn't the cause. This is a gas component, so have a contractor check and replace the part rather than trying to adjust it yourself.