How Often Should You Have Your Furnace Inspected in Colorado?

In Colorado Springs, furnaces should be inspected at least once per year in fall; systems 15 years or older need twice-yearly inspections to prevent carbon monoxide leaks and maintain homeowner's insurance coverage.

Key Takeaways

• Annual furnace inspections required by most homeowner's insurance policies in Colorado Springs.
• Twice-yearly inspections recommended for furnaces 15+ years old.
• Safe indoor CO levels must stay below 10 parts per million during inspection.
• Colorado Springs averages 166 frost days per year, requiring 5+ months of heavy furnace runtime.

Why should you inspect your furnace at least once per year?

Most HVAC manufacturers recommend annual inspections. Your homeowner's insurance likely requires them to maintain coverage on HVAC-related claims. And frankly, in a climate where overnight lows can drop into the teens before Halloween, finding out your furnace has a problem when you first turn it on in October is not the time you want to discover it.

But the annual inspection isn't just about keeping the heat on. It's a safety check.

What is the carbon monoxide risk in furnaces?

Carbon monoxide (CO) is colorless, odorless, and lethal at high concentrations. The primary source in homes is a malfunctioning gas furnace.

The most common culprit is a cracked heat exchanger. The heat exchanger is the component that separates combustion gases from the air your family breathes. It expands and contracts every time the furnace cycles. Over years of thermal stress, small cracks can develop -- and when they do, combustion gases including CO can leak directly into your home's airflow.

During a professional furnace inspection, the technician uses a combustion analyzer and often a camera to check the heat exchanger for cracks. Safe indoor CO levels should stay below 10 parts per million. We measure this during every inspection because a cracked heat exchanger doesn't always trigger a CO detector until levels are already dangerous.

A dirty filter can contribute to this problem. A clogged filter restricts airflow, which causes the furnace to overheat on every cycle. Sustained overheating cracks heat exchangers faster. So regular filter changes (every 30-90 days) reduce this risk between inspections.

Why do furnace inspections matter more in Colorado Springs?

At 6,035 feet, Colorado Springs sits high enough that altitude genuinely affects furnace combustion. Less atmospheric oxygen means combustion is less complete than at sea level. A furnace that wasn't calibrated for our elevation may be producing higher CO byproducts without any visible sign of a problem.

Our winters are also genuinely cold. Colorado Springs averages 166 frost days per year, and we regularly see weeks where lows stay in the single digits. That means your furnace isn't running for a few months -- it's running hard for the better part of five months. More runtime equals more thermal cycles on the heat exchanger and more mechanical wear on every component.

And critters. Flue vents and air intakes can collect bird nests and debris over summer. A blocked flue is another CO pathway, and it's one of the first things we check on a fall inspection.

What does a thorough furnace inspection include?

A thorough inspection covers:

• Heat exchanger visual and combustion check -- the safety item at the top of the list
• Burner inspection and cleaning -- checks for even firing and removes carbon buildup
• Flue vent inspection -- confirms gases are venting properly and nothing's blocking the exhaust
• Carbon monoxide measurement in the living space
• Blower motor check -- confirms airflow is moving heat effectively through your home
• Igniter condition -- hot surface igniters wear out; catching a weak one saves an emergency call
• Electrical connections -- loose connections cause overheating and control board failures
• High-altitude combustion calibration -- specific to Colorado, often skipped by out-of-state contractors who don't know our elevation requirements

A full inspection takes 45 to 90 minutes and typically costs $75 to $150 as a standalone service. Many homeowners roll it into a fall furnace tune-up that covers the same ground plus preventive maintenance.

When to Inspect More Often

Annual is the minimum. Consider twice a year if:

• Your furnace is 15 years or older. More thermal cycles means more risk of heat exchanger stress.
• Your system runs at unusually high hours. Vacation rentals, homes with high occupancy, or drafty older homes that cycle the furnace frequently should inspect more often.
• You've had prior issues. A system with a history of igniter failures, control board problems, or unexplained shutoffs benefits from mid-season checks.
• You have anyone in the home with respiratory conditions. CO tolerance is lower for people with asthma, COPD, or heart conditions.

When to Schedule

September or early October is the target for Colorado Springs. That gives you time to schedule, get the appointment on the calendar, and address anything the technician finds before the first hard freeze arrives.

Don't wait until November. Every HVAC company in town is slammed with emergency no-heat calls by mid-November, and non-emergency inspection appointments get pushed back weeks.

Ready to schedule a furnace inspection before the season starts? Contact us for a free estimate -- we'll get you on the calendar and make sure your system is ready for a Colorado winter.