Furnace Repair in Aurora, CO
Furnaces here run from October through May. If yours quits, tell us what it's doing and a licensed contractor who covers Arapahoe County will get in touch.
Tell us about the job
It takes about a minute.
Eight months of heat, nights near 16 degrees
Your furnace runs from October through May here, eight months of the year. On nights that average 16°F, it fires on and off all night to hold the house steady, and every cycle puts another start on the igniter and the burner. That kind of use wears those parts down faster than a mild winter ever would, and when the igniter finally gives out, the furnace stops lighting and the house goes cold.
Colorado has also seen its share of winter storms and wind events strong enough to knock out power, and 13% of households across the state lost power for a full day or more in 2024. When that happens on a night this cold, a furnace that was already working hard to keep up may not restart on its own once the power comes back.
- 8 months
- October through May, your furnace is on duty
- 16°F
- the average winter night it heats against
- 65%
- of homes here heat with gas, so most furnaces here burn gas
- 78 winter storms
- in ten years, the nights a failure hurts most
NOAA nClimDiv, 1991–2020 normals
A new furnace would cut about $100 a year off heating for a typical Arapahoe County home.
Estimates for a typical Arapahoe County home, compared with an older unit built to the previous federal minimum, from EIA household energy data, Colorado 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.
- Why won't my furnace turn on?
- Start with the thermostat. Check that it's set to heat and the temperature is above room temperature, and check that the batteries aren't dead. If the thermostat looks right, check the breaker and the furnace's own power switch, which looks like a light switch near the unit. Furnaces built with a standing pilot need that flame lit to run, but most newer ones use an igniter instead, and a failed igniter is a common reason the furnace won't start at all. If power and the thermostat check out and it still won't fire, a contractor will need to look at the ignition system.
- Why is my furnace blowing cold air?
- Most often this means the blower is running but the burners haven't lit. That points to an ignition problem, a clogged filter that's making the furnace overheat and shut down its burners, or a flame sensor that's cutting off fuel too soon. It can also mean the thermostat fan setting is on instead of auto, which pushes air through the ducts even when the furnace isn't heating. With winter lows here averaging 16°F, a furnace stuck blowing cold air needs attention fast. Check the filter and the fan setting first, then have a contractor check the burners and sensor if the problem continues.
- Why won't my furnace pilot light stay lit?
- A pilot light that won't stay lit is almost always a bad thermocouple, the small sensor that tells the gas valve the flame is burning. When it wears out or sits out of position, it reads no flame even when one is there, so the gas valve shuts off. A draft blowing across the pilot or a dirty pilot opening can cause the same thing. This part wears out over years of use, so replacing it is a normal repair rather than a sign of a bigger problem, but it does take a contractor to fit and adjust the new one correctly.