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HVAC Resources & Guides | Northern Heating & Cooling Knowledge Center

Learn & Save: HVAC Knowledge Center

Understanding your heating and cooling system shouldn’t be a mystery. At Northern Heating & Cooling, we believe that informed homeowners and business owners make better choices—and enjoy better comfort, efficiency, and peace of mind. That’s why we’ve created this collection of HVAC resources for Great Falls and the surrounding Montana communities. From practical maintenance tips to answers to your most common questions, our goal is to help you feel confident in managing your system year-round.

Frequently Asked Questions from Great Falls Homeowners

Got a quick question about your furnace, AC, or thermostat? You’re not alone. Our HVAC FAQ page covers some of the most common concerns we hear from local customers—like:

  • “How often should I replace my air filter?”

    Most homeowners should replace their HVAC air filter every 1 to 3 months, depending on usage and household factors.


    • Every month: If you have pets, allergies, or a high level of dust.

    • Every 2–3 months: For average homes without pets or allergies.

    • Every 6 months: If your system uses a high-efficiency filter and your home stays relatively clean.

    A clean filter keeps air flowing smoothly, helps your system run efficiently, and improves indoor air quality.


  • “What should I do if my furnace won’t turn on in winter?”

    If your furnace isn’t turning on, try these quick steps before calling for service:


    1. Check the thermostat – Make sure it’s set to heat and the temperature is above the current room temperature.


    2. Inspect the power – Confirm the furnace switch is on and check your circuit breaker.


    3. Look at the air filter – A clogged filter can restrict airflow and cause the system to shut down.


    4. Check the pilot light (for older furnaces) – If it’s out, relight it following the manufacturer’s instructions.


    5. Inspect the gas valve – Ensure it’s turned on if you have a gas furnace.


    If none of these fix the issue, it’s best to call a licensed HVAC technician to diagnose the problem safely and prevent further damage.

Explore answers, insights, and simple solutions from our experienced team. Check out our FAQ page to dive deeper.

Maintenance & Energy Tips That Make a Difference

Small steps can lead to big savings. Our HVAC maintenance and energy-saving tips help you stretch the life of your system and cut down on utility bills. Whether you’re prepping your AC for a summer heatwave or trying to keep the chill out during a Cascade County winter, you’ll find seasonal checklists and best practices for:


  • Reducing wear and tear
  • Maximizing airflow
  • Keeping your home or business comfortable in extreme Montana weather

Start with our Maintenance & Energy Tips guide to see how a little know-how goes a long way.

Fresh Insights from the Blog

We’re always adding new tips and ideas, so check back often or follow us on social media.

Looking for deeper dives into heating and cooling topics that matter to you? Our blog features helpful content on everything from preparing your home for wildfire smoke to the pros and cons of ductless mini-splits. Start with these recent reads:

Commercial vs. Industrial HVAC in Montana: What’s the Difference and What Do You Need?

If you’re a business owner in Great Falls—whether you're running a small office downtown or overseeing a warehouse near 6th Street NW—it’s important to know the difference between commercial and...

Montana Homeowners: Seasonal HVAC Maintenance Tips You Shouldn’t Skip

From snowy mornings in Sun Prairie to 90-degree afternoons in West Hill, Great Falls homes deal with it all. That’s why seasonal HVAC maintenance isn’t just a “nice to have”—it’s essential. Whether...

Is It Time to Replace Your HVAC System? Here’s How Great Falls Homeowners Can Tell

No one wants to replace their HVAC system before they have to—but waiting too long can cost you more in energy bills, repair visits, and stress. In a place like Great Falls, where summer highs can...

Whether you’re researching before a major upgrade or just want to stay ahead of seasonal HVAC needs, the Northern Heating & Cooling Knowledge Center is here to help. Looking for something specific? Don’t hesitate to contact us—our team is happy to provide answers and recommendations tailored to your space.