How Often Should a Furnace Be Serviced Before Winter in Cold Climates?

When November temperatures drop across the Western Slope, your furnace becomes the MVP of the season. From Montrose and Delta to Ouray, Ridgway, and Telluride, homes sit at higher elevations where cold nights and thinner air can strain heating systems. A well-timed furnace tune-up keeps your home comfortable for Thanksgiving guests, protects against carbon monoxide issues, and helps avoid midwinter breakdowns. Here’s what local homeowners should know—and how West Plumbing, LLC can help you stay warm and worry-free.

Do I really need annual furnace maintenance?

Yes—especially in cold, high-altitude climates. Most manufacturers recommend (and warranties require) annual service to maintain efficiency and safety. In places like Montrose and Telluride, furnaces work harder and longer, and gas-fired equipment often needs high-altitude adjustments for proper combustion. Annual maintenance catches small issues—like a weak igniter or dirty flame sensor—before they cause a no-heat call in a snowstorm. If your system is older than 10 years, consider biannual checks (pre- and post-winter) for extra peace of mind.

What does a professional furnace tune-up include?

A quality furnace maintenance visit focuses on safety, performance, and reliability. Our tune-ups typically include:

Combustion analysis and high-altitude gas pressure verification

Inspection and cleaning of burners, flame sensor, and igniter

Check and calibrate thermostat, safeties, and control board

Blower wheel and motor inspection; lubrication where applicable

Filter check and airflow measurement; duct and vent visual check

Heat exchanger inspection for cracks or corrosion

Flue and venting inspection for blockages and proper draft

Condensate drain cleaning (for high-efficiency units) and trap priming

Local factors Western Slope homeowners should consider

Cold snaps and elevation create unique stresses. High-altitude derating (adjusting input to account for thinner air) may be needed for accurate, safe combustion. In snow-prone areas like Ouray and Ridgway, keep sidewall PVC vents cleared of drifts and ice; blocked vents can shut down a furnace. For high-efficiency models, ensure condensate lines are insulated and pitched correctly to prevent freezing. Homes with short-term rentals near ski areas benefit from guest-proof settings, clean filters, and fresh CO detector batteries to reduce emergency calls.

When should I schedule service in November?

Ideally, book in early fall, but November is still the right time—before deep freezes and holiday travel. A pre-Thanksgiving tune-up in Montrose or Delta ensures steady heat when hosting, and you’ll avoid the peak-season rush for emergency repairs. If your furnace hasn’t been checked in 12 months—or you’ve noticed any unusual noises or short cycling—schedule now. You’ll improve efficiency, stabilize temperatures, and likely lower energy bills during the coldest months.

Warning signs you shouldn’t wait to address

Burning or electrical odors when the furnace starts

Frequent cycling on and off or uneven room temperatures

New rattling, squealing, or booming noises

Higher gas or electric bills without a weather change

Yellow or wavering burner flames (instead of steady blue)

Simple homeowner checks between service visits



Swap or clean filters every 1–3 months; in dusty or high-traffic homes, monthly changes are smart. Choose the right filter (MERV 8–11 balances capture and airflow for most systems). Keep supply and return vents open and unobstructed, especially in rooms far from the thermostat. Test CO detectors and replace batteries before the holidays. If you have a programmable thermostat, set efficient schedules for when you’re sleeping, hosting, or out enjoying the slopes.

Why choose West Plumbing, LLC for furnace maintenance?

We’re a local, family-owned team serving Montrose, CO and nearby communities with honest pricing, clear communication, and careful craftsmanship. Our technicians understand high-altitude combustion, winter venting issues, and the realities of Western Slope weather. From furnace maintenance and repair to boiler service and radiant heat, we help you get the job done right the first time—so your home stays safe, warm, and efficient all season.

Ready to schedule your tune-up?

Book your November furnace service with West Plumbing, LLC today. We’ll optimize your system for cold-climate performance, reduce the risk of holiday breakdowns, and help lower winter energy costs. Call now or visit westplumbing.co to schedule service in Montrose, Delta, Ouray, Ridgway, and Telluride.