Furnace Repair in Broomfield, CO
Furnaces here run from October through May. If yours quits, tell us what it's doing and a licensed contractor who covers Broomfield County will get in touch.
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Eight months of heat, and nights near 20 degrees
Broomfield needs furnace heat from October through May. That is most of the year, and on winter nights that average 20°F, the furnace is not just holding a room steady, it is running long cycles to keep up. The burner lights, runs, shuts off, and lights again, night after night, for eight months straight.
That many cycles wears on the igniter first. Most homes here heat with gas, and a worn igniter is the most common reason a gas furnace stops lighting. You will notice it as cold air coming from the vents, or the furnace running through its startup sequence and shutting down instead of lighting. Broomfield County has also logged 71 winter storms and 60 damaging wind events over the past ten years, and outages that follow a storm can shut a furnace down mid-cycle even when nothing inside it has failed.
- 8 months
- October through May, your furnace is on duty
- 20°F
- the average winter night it heats against
- 71%
- of homes here heat with gas, so most furnaces here burn gas
- 71 winter storms
- in ten years, the nights a failure hurts most
NOAA nClimDiv, 1991–2020 normals
A new furnace would cut about $90 a year off heating for a typical Broomfield County home.
Estimates for a typical Broomfield 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?
- Most often the thermostat isn't calling for heat the way it should, or the furnace isn't getting power, gas, or a signal from its safety switches. Check that the thermostat is set below room temperature and has fresh batteries if it uses them. A tripped breaker, a closed gas valve, or a switch left off at the furnace itself will also keep it from starting. If those check out, a flame sensor or igniter that's failed is a common next cause, and that's a job for a contractor to test and replace.
- Why is my furnace blowing cold air?
- Air that stays cold usually means the burners aren't lighting even though the blower is running. A dirty flame sensor is a frequent cause, since it can't detect the flame and shuts the gas off as a safety step. A clogged filter can also starve the burners of the airflow they need to stay lit. If the air only feels cool at first before turning warm, that's normal, since the furnace blows air before the heat exchanger is fully up to temperature.
- Why won't my furnace pilot light stay lit?
- A pilot light that keeps going out is almost always a sign the thermocouple isn't sensing the flame anymore. That small part is what tells the gas valve it's safe to stay open, and once it wears out or gets coated in soot, the valve shuts the gas off within seconds of you letting go of the knob. A draft blowing across the pilot can cause the same symptom, so check if a vent or door nearby is stirring air toward it. Either way, a furnace with a standing pilot that won't hold flame needs a contractor to test the thermocouple and gas valve before winter nights here, which average 20°F, put more demand on it.