Colorado Heating Pros
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Furnace Repair in Greeley, CO

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Step 1 of 3: Equipment

Weld County saw 637 severe weather events between 2015 and 2024. That includes 388 hail events, 172 damaging wind events, and 34 tornadoes. A furnace shares a flue or an electrical panel with systems that take the brunt of that kind of weather, and a nearby lightning strike or power surge can damage its control board even when nothing outside looks touched. Statewide, 13% of Colorado households lost power for a day or more in 2024. A furnace needs electricity to run its blower and ignition even on gas heat, so when the power is out, so is the heat, no matter how much fuel is in the line.

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
Isometric line illustration of a cutaway building interior showing a furnace unit with a flue pipe and ductwork running along the ceiling, plus adjacent rooms with simplified furniture.
Your furnace works hardest from November through March.

NOAA nClimDiv, 1991–2020 normals

Furnaces here start working in October and keep going through May.

A weak part that made it through last winter is the one that fails in the first cold week of this one.

Half the homes here were built in 2001 or later, and a young furnace is usually worth fixing

Half the homes here were built by 2001
Heat runs October through May
Winter nights average 16°F
Built for eight months of workFurnace here runs October through May, and Weld County saw 42 winter storms between 2015 and 2024

If your furnace came with the house and the house is newer, get it repaired rather than planning around a replacement. A control board or blower motor damaged by a power surge is a part failure, not a sign the whole unit is near the end. Half the homes in Weld County were built in 2001 or later, so a lot of furnaces here still have years of service ahead of them. Mobile homes are the exception worth asking about. They make up a small share of housing here, and their furnaces often run on a different setup than a house furnace, so check with the contractor about parts before you assume the repair will be quick.

If the last storm left your furnace acting up, get it looked at

A lightning strike or a power surge can take out a control board without leaving a mark outside. If your furnace has been acting up since the last storm, that's worth having someone look at before the next cold snap tests it.

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A gas furnace with attached ductwork, gas piping, and condensate lines installed in a concrete-block basement.

Eight months of running time wears down real parts

Eight months of work a year adds up, and the storms stack more hours on top of that. If your furnace has been running rough, short cycling, or struggling to keep up, that's wear talking, not a sign something was installed wrong. Have the actual part checked before any of it gets replaced. A blower motor or igniter that's worn out can usually be swapped on its own, and there's no reason to pay for a new system when the fix is smaller than that.

Check the simple things first

Make sure the thermostat is set to heat and the setpoint is above room temperature, and check that its batteries aren't dead. Look at the furnace switch, the one that looks like a light switch near the unit, and make sure it's on. Check the breaker for the furnace in the electrical panel, since a tripped breaker will cut power to the blower and ignition even when the gas is fine.

Know what you can and can't check yourself

You can check the air filter and swap it if it's clogged, since a blocked filter can starve the system of airflow and trip a safety switch. You can confirm the gas valve at the furnace is open. Past that, leave it alone. The flame sensor, igniter, control board and heat exchanger take tools and training to test safely, and opening the cabinet on a furnace that's throwing an error code is a job for someone who knows what that code means.

An unfinished basement featuring concrete block walls, exposed floor joists, and a metal forced-air furnace with ductwork near a central pillar.

A new furnace would cut about $100 a year off heating for a typical Weld County home.

  • A new high-efficiency furnace$410 a year
  • An older furnace$510 a year

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.

A diagnostic visit starts with the error code if the control board is flashing one, since that narrows down where to look before any panel comes off. The tech checks for flame and watches how long it takes to light, because a delayed ignition points at the flame sensor or the igniter even before either one gets tested directly. Airflow gets checked too, since a blower pulling too little air or too much can trip the limit switch and shut the whole system down as a safety measure, not a failure on its own. They'll test the gas pressure at the valve and check that the heat exchanger isn't cracked, because a cracked exchanger is a safety issue, not a repair you patch. Most of this gets sorted out with a meter and a combustion analyzer rather than guesswork, and a tech who's seen the code before usually knows which part to check first.