Serving Littleton since 2020
Furnace Service in Littleton, CO
Furnace running, but something is off? Book a service call.
Some furnaces do not fail. They just stop being right. The back bedroom never warms up. There is a noise you have started listening for. The gas bill went up and the house did not.
Mon–Fri 7am–9pm · Sat–Sun 8am–6pm · Emergency line 24 hours
- Starts with a symptomRuns, but not right
- Full heating cycleWe watch what the furnace does
- Price before workNothing is touched until you say go
- Licensed and insuredThe technician who runs your system
Service call
What we mean by a service call
That is what a service call is for. The furnace works: we find out why it is not working properly.
A service call is a diagnostic visit on a running furnace. A technician puts the system through a full heating cycle, watches what it does, and tells you what is causing the symptom you called about.
It is not the annual tune-up. That is scheduled maintenance on a furnace that is behaving, booked before the season starts. If that is what you want, book a furnace tune-up instead. A service call starts with a complaint. Something changed, and you noticed.
If you have no heat at all, that is a different call: emergency furnace repair.
Runs, but not rightWhat a service call is for
Symptoms
Symptoms worth a service call
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Some rooms never get warm
Uneven heat usually points at airflow rather than the furnace itself: a closed or crushed duct run, a blocked return, a filter nobody has changed, or a blower moving less air than it should. We check the ductwork, the returns, the filter and the blower before telling you whether the furnace itself is the problem.
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A noise you have started listening for
A squeal normally points to the blower motor or its bearings. A bang on startup often means delayed ignition. A rattle can be a loose panel, or a draft inducer on its way out. Noises like these get worse rather than better, so we trace it to the part before anything is replaced.
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The gas bill climbed and the house did not
If the gas bill climbs with no obvious change in usage or weather, a furnace running longer than it should is one thing worth checking. Dirty burners, a restricted flue, a failing blower, or a system never set up for this elevation can all do it. We check the burner condition, the flue, the blower and the input setting against the manufacturer's manual.
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It runs in short bursts
Starting, stopping and starting again is short cycling, usually a clogged filter, a blocked flue or a limit switch shutting the unit down on overheat. We find which one and clear the cause, rather than resetting it and leaving you to call again.
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Cool air part of the time
Heat that comes and goes, or a blower still running after the burners drop out, is often a flame sensor, an igniter or a control board issue. We test all three and tell you which one is dropping out before anything is replaced.
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A smell that keeps coming back
Dust burning off on the first cold day clears within an hour. A smell that returns every cycle does not. A gas smell is not a service call. Leave the house and call the gas company first.
5,400 ftLittleton elevation, roughly
Why "it can't keep up" is common at this elevation
Littleton sits at roughly 5,400 feet, and a furnace that was never set up for that runs at a lower input rate than its label suggests. It is one of the things we separate from a genuine fault on a service call, before anyone suggests a bigger furnace.
Setting the input rate is the installer's job, not something the furnace sorts out for itself. When we find a unit that was never converted, we tell you.
Which call
Which call do you need?
| Your situation | The call to book |
|---|---|
| No heat, or a gas or CO concern | Emergency furnace repair |
| It runs, but something is wrong | Furnace service: this page |
| Nothing wrong, pre-season check | Annual tune-up |
| Repairs stacking up on an old unit | Repair or replace |
On the visit
What happens on the visit
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You describe the symptom.
Not the diagnosis, the symptom. "Upstairs never warms up." "It squeals for the first minute." That sentence tells us what to bring.
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We run the system.
A licensed and insured technician takes the furnace through a full cycle and checks the parts behind your symptom: burners, flame sensor, igniter, limit and pressure switches, gas valve, blower motor, capacitor, draft inducer, flue, filter and ductwork.
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The finding and the price first.
What has failed, what it takes to fix, what it costs. Nothing is touched until you say go.
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We fix what we can that day.
Where the part is one we carry (igniters, flame sensors, capacitors, limit switches, thermostats), it is done on the visit. A blower motor or control board may need ordering, and you get told that day, with a date.
Sometimes the finding is that nothing has failed: the ductwork, the thermostat placement or the original sizing is the problem. We say that too.
Pricing
What it costs
- Diagnostic call$89–$150Credited against the repair if you go ahead
- Most repairs in this area$150–$800Wide because the parts are
- Before any workPrice firstNothing is touched until you say go
Most furnace repairs in this area fall between $150 and $800. A diagnostic call typically runs $89 to $150, credited against the repair if you go ahead.
The range is wide because the parts are. A flame sensor is a small job; a blower motor is not. An exact figure usually needs seeing the unit first.
A licensed and insured technician runs every service call.
Service area
Areas we serve
Littleton, Centennial, Highlands Ranch, Englewood, Greenwood Village and Cherry Hills Village: 14 residential ZIP codes across Arapahoe, Douglas and Jefferson counties.
FAQ
Frequently asked questions
Is a service call the same as a tune-up?
No. A tune-up is scheduled maintenance on a furnace that is behaving normally. A service call starts because something is wrong. If the furnace is fine and you want it checked before winter, book the tune-up.
My furnace still works. Can this wait until spring?
Usually yes, but a symptom that is getting worse is worth checking before it turns into a larger repair. Short cycling and blower noises in particular tend to escalate.
How long does a service call take?
Many diagnostic visits take around an hour, though it depends on the fault. Where the part is one we carry, the repair often finishes in the same visit.
The house never gets warm enough. Is the furnace too small?
Sometimes. It can also be ductwork, airflow, or a unit never derated for this elevation. Separating those is what a service call is for.
Is it worth servicing a 20-year-old furnace?
Gas furnaces typically run 15 to 20 years. A small repair on an older unit can still be the right call for another winter. A major component on one that old usually is not.
Furnace running, but something is off?
Mon–Fri 7am–9pm · Sat–Sun 8am–6pm · Emergency line 24 hours
Something off? Book a service call.
Tell us the symptom. We find out why the furnace is not working properly, and give you the price first.
Furnace Repair Pros · 2679 W Main St, Suite 300, Littleton, CO 80120