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Furnace Repair in Littleton, CO
We find the cause, show you the price, and you decide.
- HVAC diagnostic: $99.95
- Price before any work starts
- Written guarantees
Furnace Repair in Littleton From Our Shaffer Parkway Shop
Summit Heating, A/C, Plumbing & Electrical repairs gas furnaces for homeowners in Littleton from our shop at 8091 Shaffer Pkwy, Suite C. It’s for the furnace that runs but blows cold, starts and stops every few minutes, or won’t light at all. Your technician finds what failed, explains it in plain words, and gives you the price before any work starts, so you decide between a repair and a replacement with the facts in front of you.
HVAC diagnostic: $99.95. Your technician reviews the estimate with you. You can approve it on the spot or later through a link to the estimate.
Columbine, around West Coal Mine Avenue and South Pierce Street, is about 3 miles from the shop. The 80128 homes toward Chatfield State Park, off C-470 and South Wadsworth Boulevard, are about the same distance. Homes near West Mineral Avenue and South Santa Fe Drive in 80120 are closer to 6 miles.
HVAC diagnostic: $99.95. Your technician reviews the estimate with you. You can approve it on the spot or later through a link to the estimate.
Columbine, around West Coal Mine Avenue and South Pierce Street, is about 3 miles from the shop. The 80128 homes toward Chatfield State Park, off C-470 and South Wadsworth Boulevard, are about the same distance. Homes near West Mineral Avenue and South Santa Fe Drive in 80120 are closer to 6 miles.
How a Furnace Repair Visit Works
- Call (720) 870-1580 or request service online. Hours are Monday to Friday 7am to 6pm and Saturday and Sunday 8am to 3pm. After hours: our answering service takes your call and we call back the next business day.
- Your technician runs the HVAC diagnostic ($99.95) and shows you what failed.
- If a repair is the honest answer, you hear that first.
- Your technician reviews the estimate with you. Approve it on the spot, or later from the link after you’ve talked it over.
- We make the repair, check that the furnace heats, and clean up the work area.
Gas Furnace Problems We Diagnose
No heat
The furnace won't light, or the blower runs and the house keeps getting colder.
Cold air from the vents
The fan moves air, but the burners shut off early or never come on.
Short cycling
The furnace starts and stops every few minutes instead of finishing a cycle.
Thermostat calls, nothing happens
Sometimes the furnace is fine and the thermostat or its wiring is the fault.
New noises
Squeals, rattles or a bang at startup that weren't there last winter.
Each symptom has more than one possible cause, which is why the diagnostic comes before the price.
Furnace Repair Cost and the $99.95 HVAC Diagnostic
Every repair visit starts with the $99.95 HVAC diagnostic. We don’t post repair prices for furnace parts, because the price depends on what failed, and nobody knows that until the furnace has been tested. You see the repair price before any work starts, and nothing happens until you approve it.
What changes the repair price:
What changes the repair price:
- The part that failed and what it costs.
- Your furnace’s make and age.
- How much labor the repair takes.
- Whether the fault points to a repair or to a furnace near the end of its life.
Furnace Repair First, Replacement When It's the Better Call
We look at repair first. Colorado’s low-NOx law doesn’t change that: new gas furnaces sold in Colorado since Jan 1, 2026 must meet ultra-low-NOx limits (or be ENERGY STAR), but the rule covers new equipment, not fixing the furnace you have. (HB23-1161, checked Nov 2026.)
If the furnace is worn out, your technician says so and explains why. You can then price a new one on our furnace replacement page and approve that estimate now or later.
If the furnace is worn out, your technician says so and explains why. You can then price a new one on our furnace replacement page and approve that estimate now or later.
Littleton Altitude, Permits and Furnace Work
Littleton sits at roughly 5,320 to 5,360 feet (City of Littleton historic survey). Gas furnaces here are set up to the manufacturer’s high-altitude instructions, and those differ by model, so when a repair touches the gas valve or burners we work from the manual for your unit.
Heating carries most of the load here. NOAA’s 1991-2020 normals for Denver International Airport show about 5,863 heating degree days a year and January lows averaging 18.7°F.
Colorado has no statewide HVAC license, so Littleton licenses mechanical contractors itself under a Class D-11 HVAC registration. The City of Littleton Building Division, at 2255 W. Berry Ave, takes every permit through its eTRAKiT portal, and its permit list names furnaces. That matters when a repair turns into a replacement. Some 80128 addresses around Columbine carry a Littleton mailing address but sit in unincorporated Jefferson County, which has its own Division of Building Safety. (City of Littleton and Jefferson County, checked Nov 2026.)
Heating carries most of the load here. NOAA’s 1991-2020 normals for Denver International Airport show about 5,863 heating degree days a year and January lows averaging 18.7°F.
Colorado has no statewide HVAC license, so Littleton licenses mechanical contractors itself under a Class D-11 HVAC registration. The City of Littleton Building Division, at 2255 W. Berry Ave, takes every permit through its eTRAKiT portal, and its permit list names furnaces. That matters when a repair turns into a replacement. Some 80128 addresses around Columbine carry a Littleton mailing address but sit in unincorporated Jefferson County, which has its own Division of Building Safety. (City of Littleton and Jefferson County, checked Nov 2026.)
Our Written Guarantees on Every Furnace Repair
Google Reviews of Summit Heating, A/C, Plumbing & Electrical
Summit holds a 4.7 rating from 432 Google reviews.
"Our first encounter was a heating issue - they were able to apply a simple fix, and recommended a new thermostat."
John
Related Heating and Cooling Services Near Littleton
HVAC Services Related to Furnace Repair
Furnace Replacement, Tune-Ups and Heat Pump Repair
If the furnace needs more than a repair, see furnace replacement in Littleton. To keep it running through winter, book a furnace tune-up. Homes heated by a heat pump or a hot-water boiler have their own pages: heat pump repair and boiler repair and replacement. For summer, there’s AC repair in Littleton.
Everything we do for Littleton homes is on the Littleton HVAC page. Next door, we also cover Ken Caryl, and the Denver furnace repair page covers the wider metro.
Everything we do for Littleton homes is on the Littleton HVAC page. Next door, we also cover Ken Caryl, and the Denver furnace repair page covers the wider metro.
Furnace Repair Questions from Littleton Homeowners
How much does furnace repair cost in Littleton?
The visit starts with the $99.95 HVAC diagnostic. Once your technician finds the fault, you see the repair price before any work starts. You can approve the estimate on the spot or later through a link.
Is my furnace worth repairing, or should I replace it?
Your technician tells you which way the facts point and why. Repair comes first when it’s a real fix. If the furnace is near the end, you get a replacement estimate to approve now or later, with no pressure to decide on the spot.
What happens if my furnace quits after hours?
We’re open Monday to Friday 7am to 6pm and Saturday and Sunday 8am to 3pm. After hours, our answering service takes your call and we call back the next business day. We don’t promise overnight dispatch, because we don’t staff it.
Will Colorado's low-NOx rule force me to replace my furnace?
No. The rule says new gas furnaces sold in Colorado since Jan 1, 2026 must meet ultra-low-NOx limits or be ENERGY STAR. Repairing the furnace you already have isn’t affected.
Does Littleton's altitude matter for a furnace repair?
It can. Littleton sits at about 5,320 to 5,360 feet, and gas furnaces are set up to the manufacturer’s high-altitude instructions. When a repair involves the gas valve or burners, we follow the manual for your model.
Do you repair furnaces in Columbine and other areas with a Littleton address?
Yes. Columbine is about 3 miles from our Shaffer Parkway shop. Unincorporated Jefferson County addresses follow county permit rules instead of the City of Littleton’s, which matters only if a repair turns into a replacement.
Schedule Furnace Repair in Littleton
Book a furnace diagnostic Call (720) 870-1580 to book a heating diagnostic. Or request service at /get-a-quote/.