Furnace Repair in Greeley, CO
Furnaces here run from October through May. If yours quits, tell us what it's doing and a licensed contractor who covers Weld County will get in touch.
Tell us about the job
It takes about a minute.
Eight months of heat a year, and nights near 16 degrees
Your furnace in Greeley works from October through May. On the cold nights, when the outside temperature drops to around 16°F, it runs long and cycles often to keep up. That kind of steady demand wears on the igniter and the burner assembly faster than a mild winter would.
Most furnaces here run on gas, and a gas furnace needs power to run its controls and blower even though the flame doesn't. Weld County has seen 42 winter storms and 172 damaging wind events over the past ten years, and statewide, about 13% of households lost power for a day or more in 2024. When the power drops mid-winter, a furnace that was running fine goes silent, and it's worth knowing whether the problem is the furnace or the outage before you call anyone out.
- 8 months
- October through May, your furnace is on duty
- 16°F
- the average winter night it heats against
- 73%
- of homes here heat with gas, so most furnaces here burn gas
- 42 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 Weld County home.
Estimates for a typical Weld 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 setting is above room temperature, since a setting bumped down or a dead battery will stop the call for heat before it starts. If the thermostat looks right, check the breaker and the furnace's power switch, which looks like a regular light switch near the unit. Furnaces also won't run if the air filter is badly clogged or if the flame sensor or igniter has failed, and those need a contractor to check.
- Why is my furnace blowing cold air?
- In most cases the furnace hasn't actually started heating yet. When it first kicks on, air moves through the ducts for a short while before the burners fire, so what you feel at first is air that hasn't warmed up. If cold air keeps blowing well after the cycle starts, the igniter or flame sensor may have failed, meaning the blower is running but no flame ever lit. It can also mean the thermostat fan setting is stuck on instead of auto, which runs the blower nonstop between heating cycles.
- 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 is lit, and the gas valve shuts off to be safe. A draft blowing across the pilot or a dirty pilot orifice can cause the same problem. A furnace with a standing pilot doesn't use electricity to run that flame, so a power outage won't be the cause here, but a contractor will need to check the thermocouple and clean or adjust the pilot assembly.