Annual Gas Fireplace Service and Cleaning in Fort Collins

Annual gas fireplace service in Fort Collins runs $175 to $350 per fireplace, with a discount for the second and third unit in the same house. It is a cleaning and a test in one visit: burner, pilot, logs, glass, and blower cleaned; thermopile output, gas pressure, venting, and gasket checked; leak and carbon monoxide check done before winter. Book it in September or October and the first cold night is a non-event.

If you smell gas at any time, leave the house and call Xcel Energy or 911 from outside. A service visit is for a fireplace that is safe and due, not for a leak.

Why fall service pays for itself here

Fort Collins fireplaces work for a living. The Colorado Climate Center’s station on the CSU campus, which has kept records since 1889, puts the 1991-2020 January normal at a 45.0 degree high and an 18.3 degree low, and NOAA’s normals give the city 51.4 inches of snow a year. From roughly April to October the fireplace sits cold. Dust settles into the pilot hood and the burner ports. Spiders, which like the smell of gas odorant, build in the pilot tube and venturi. The thermocouple tip oxidizes. On a direct-vent unit the glass gasket hardens a little more each year, and the blower cage collects a year of lint.

Then October. The pilot lights but will not hold, or holds but the burner never comes on, and the week after the first hard freeze is the busiest of our year. A September service finds the thermopile reading 280 millivolts and replaces it for $200 to $400 while the schedule is open, instead of you waiting in a cold snap. It is the cheapest hour in this trade.

What the service includes

1. Safety first. Combustible gas detector at the valve, the flare fittings, the pilot tubing, and the firebox. Carbon monoxide reading with the unit running. Vent termination checked outside for blockage, nests, and snow clearance; clearances to combustibles checked inside.
2. Burner and pilot cleaned. Burner ports cleared, the venturi and air shutter cleaned, the pilot hood and orifice cleaned back to a sharp blue flame that wraps both the thermocouple and the thermopile.
3. Logs and embers reset. Logs vacuumed, never washed, and repositioned to the manufacturer’s diagram. A log sitting on a port is the most common cause of black soot we see. Embers refreshed for a proper flame picture.
4. Glass and gasket. Ceramic glass cleaned inside and out with the right product. The white haze is normal combustion deposit and comes off; black soot is a symptom, and we find the cause. Gasket inspected for hardening or gaps; on a sealed direct-vent unit the gasket is what keeps exhaust out of the room.
5. Blower. Cage and wheel cleared of lint, speed control and thermostatic switch tested. A screeching blower on a 1990s south-Fort-Collins unit gets quoted at $250 to $600 if it is at the end of its life.
6. Instrument readings. Thermopile output open circuit and under load (should be roughly 300 to 750 millivolts). Inlet and manifold gas pressure in inches of water column, checked against the manufacturer’s figure for the elevation. Spark, flame-sense, and battery backup on electronic units.
7. Altitude check. Fort Collins sits at 4,997 feet. The National Fuel Gas Code calls for derating gas appliances installed above 2,000 feet by about 4 percent per 1,000 feet, and a unit that was never fitted with its high-altitude orifice runs rich and soots no matter how clean it is. We confirm the orifice and pressure match the elevation. In Estes Park at 7,743 feet this step matters twice as much.
8. Controls. Wall switch, thermostat, remote and receiver tested; batteries replaced.
9. Test-fire and documentation. Full cycle: ignition, run, shutdown, relight. You get the readings on paper so next year’s visit has a baseline.

What it costs, and what it can find

Parts found weak during service are quoted from the published ranges before they are replaced; nothing gets swapped on a hunch. A thermopile at 450 millivolts stays. One at 280 gets replaced now, because it will be at 220 in January.

Different fireplaces, different service

• Direct-vent units in south Fort Collins, Loveland, Windsor, and Timnath. The sealed-glass factory units that the late-20th-century southward expansion of the city was built with. Service centers on the gasket, the coaxial vent termination, the thermopile, and the blower.
• Gas logs in Old Town and 1970s masonry fireplaces. Vented log sets in a real chimney. Service adds the damper (it must stay open with vented logs and usually has a clamp to keep it from closing), the chimney throat for debris, and the burner pan, which corrodes.
• Vent-free log sets. The oxygen depletion sensor (ODS) pilot is the safety device, and it is fussy about dust. Cleaning it and verifying the CO reading in the room is the core of the visit.
• B-vent stoves and older units. Draft check at the vent, spillage test at the draft hood.
• Propane units in Estes Park and rural Wellington. Higher pressure, smaller orifices, and a regulator at the tank that is part of the inspection.

Who does it

Service arranged through this site is performed by licensed, insured Colorado gas and hearth technicians. Fort Collins licenses fireplace appliance work through its Building Services trade licenses, and the State Plumbing Board regulates the gas piping side; a service visit touches no piping and needs no permit. If the visit finds a cracked firebox, a failed vent, or a valve on its last legs on a 30-year-old unit, you get that news straight, with the replacement option priced honestly next to the repair.

Book September through early November for Fort Collins, Wellington, Timnath, Loveland, Windsor, and Greeley. Estes Park service runs in scheduled blocks, about 41 road miles up US 34. Two or more fireplaces in one house, or several houses on one street, get the per-unit discount.