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Frequently Asked Questions About Your Heating and Cooling System

At Ace Heating and Air, we believe informed customers make better decisions about their heating and cooling needs. Our team of experts in Kalispell has compiled answers to questions we frequently receive about our comprehensive heating and cooling services.

How Often Should I Service My HVAC System In Montana?
Living in Kalispell and the Flathead Valley means your heating system works harder than most. We recommend scheduling a furnace tune-up every fall before the cold sets in, and an AC or heat pump tune-up each spring. Staying on a consistent maintenance schedule is one of the best ways to avoid unexpected breakdowns during the months when you need your system most — and in a Montana winter, that’s not a risk worth taking.
What Signs Indicate I Need HVAC Emergency Repair?

Contact Ace Heating and Air immediately if you notice unusual sounds (banging, grinding), persistent burning smells, no heat or cooling production, a yellow pilot light (instead of blue), or unusually high energy bills. These symptoms may indicate serious issues requiring professional attention. Our HVAC emergency repair technicians are available 24/7 to restore your comfort and safety.

How Long Do Furnaces And AC Systems Last In Flathead Valley?
Because of the heavy demands that Montana winters place on heating equipment, lifespan can vary. Most furnaces last between 15 and 20 years, while central AC units and heat pumps typically run 10 to 15 years with regular use. The key factor in reaching — or exceeding — those timelines is maintenance. Systems that receive annual tune-ups consistently outlast those that don’t, often by several years.
Why Is My Energy Bill So High In Winter?
A spike in your heating bill during Montana winters isn’t always just the cold — it’s often a sign that something in your system needs attention. Common culprits include a dirty air filter restricting airflow, an older furnace that has lost efficiency over time, duct leaks allowing warm air to escape before it reaches your living spaces, or gaps in insulation that make your system work overtime. The good news is that most of these issues are diagnosable quickly, and addressing them can make a noticeable difference in your monthly costs.
Why Is My Furnace Blowing Cold Air?
If your furnace is running but the air coming out isn’t warm, there are a few likely causes. A dirty flame sensor is one of the most common — it can prevent the burner from staying lit, causing the system to push unheated air through your home. Ignition issues, thermostat malfunctions, and an overheating safety shutoff can also be responsible. Because a furnace that stops heating in a Montana winter can quickly become a safety concern, it’s important to have the problem diagnosed and resolved as soon as possible.
Why Is My AC Freezing Up In Summer?
A frozen AC unit is usually a sign of restricted airflow or a refrigerant issue. The most common cause is a dirty air filter that’s blocking airflow — something easy to overlook but can quickly cause problems. Low refrigerant levels or other airflow restrictions can also cause ice to build up on the coils. If you notice your system freezing, turn it off and let it thaw completely before restarting. If it happens again, give us a call so we can identify the root cause and prevent further damage.
What Should I Check Before Calling An HVAC Technician?
Before picking up the phone, there are a few quick checks that sometimes resolve the issue on their own. Start by replacing your air filter if it’s been a while — a clogged filter is one of the most common causes of HVAC problems. Next, check your thermostat settings to make sure everything looks correct, then check your breaker panel to see if a breaker has tripped and needs to be reset. Finally, make sure all of your vents are open and unobstructed. If you’ve worked through that checklist and the system still isn’t performing as expected, we’re ready to help.
When Should I Replace My Furnace Instead Of Repairing It?
Knowing when to repair versus replace can save you money in the long run. As a general rule, if your system is 15 or more years old, repairs are becoming more frequent, your energy bills have been climbing, or your home simply isn’t staying comfortable the way it used to, replacement is often the smarter investment. A new, high-efficiency system will typically pay for itself over time through lower utility costs and fewer service calls. We always give honest, straightforward recommendations — our goal is to help you make the best decision for your home and your budget, not to push a sale.
How Often Should I Schedule HVAC Maintenance?
We recommend scheduling professional maintenance twice yearly – once in spring for your cooling system and once in fall for your heating system. Regular heating and cooling maintenance helps prevent unexpected breakdowns, extends equipment lifespan, and maintains energy efficiency. Ace Heating and Air offers complete maintenance plans for both residential and commercial systems to keep your equipment running optimally year-round.
How Long Do Heating and Cooling Systems Typically Last?
With proper maintenance, most heating and cooling systems last 15-20 years. However, several factors affect lifespan, including equipment quality, proper installation, usage patterns, and regular maintenance. Our services include helping you determine when repair or replacement is more cost-effective based on your system’s age, condition, and efficiency.
What Are The Benefits Of Ductless Heating and Cooling Systems?
Ductless systems offer several advantages, including zone-specific temperature control, energy efficiency, easier installation (no ductwork required), improved indoor air quality, and quieter operation. Ace Heating and Air provides expert consultation to determine if a ductless system suits your specific needs and space requirements in Kalispell.
How Soon Can You Provide Commercial AC Repair?
Our commercial AC repair team responds quickly to business climate control emergencies, often within hours of your call. We understand that cooling issues can disrupt operations and affect customer comfort. Ace Heating and Air prioritizes commercial AC repair calls with dedicated technicians who specialize in commercial systems of all sizes and configurations to minimize business downtime.
Are Geothermal Heating and Cooling Systems Worth The Investment?
While geothermal systems have higher upfront costs, they typically deliver substantial long-term savings through reduced energy bills (30-70% lower), exceptional durability (25+ years for indoor components, 50+ years for ground loops), environmental benefits, and consistent comfort. Our experts can calculate potential return on investment based on your property and heating and cooling usage patterns.
How Much Does A New HVAC System Cost In Montana?
The cost of a new system depends on several factors, including the size of your home, the efficiency rating of the equipment, and the complexity of the installation. As a general range, furnace replacements typically run between $4,000 and $9,000, while a full system replacement can range from $8,000 to $15,000 or higher. We provide detailed estimates upfront to avoid surprises, and we offer financing options to help make the investment more manageable.
Is it normal for my heat pump to go into defrost mode?
Yes, this is completely normal — and it’s actually a sign that your system is working as intended. When temperatures drop, frost can accumulate on the outdoor unit, and the heat pump will periodically enter a defrost cycle to clear it. During this cycle, you may notice steam rising from the unit or feel slightly cooler air coming from your vents for a short time. Both are expected and nothing to be concerned about. If the defrost cycle seems to run constantly or for unusually long periods, that’s worth calling us about.
Why Is My House So Dry In Winter?
Dry indoor air is a very common complaint in Montana homes during the winter months, and there’s a straightforward reason for it: cold outdoor air naturally holds very little moisture. When that air is pulled into your home and heated, the relative humidity drops significantly, leaving you with dry skin, static electricity, and cracking wood that so many homeowners notice this time of year. The most effective long-term solution is a whole-home humidifier, which works with your existing HVAC system to maintain comfortable humidity levels throughout the house — not just in one room.
How Can I Improve Indoor Air Quality?
There are several ways to improve the air inside your home, and the right solution depends on your specific situation. High-efficiency air filters are a simple starting point, capturing more airborne particles than standard filters. UV air purifiers can help neutralize bacteria and other biological contaminants in your air supply. If winter dryness is a concern, a whole-home humidifier can make a significant difference in comfort. And if it’s been a while since your ducts were cleaned, built-up dust and debris may be circulating through your home every time your system runs. We can evaluate your home and recommend the options that make the most sense for you.
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Emergency Air Conditioning Service

When your air conditioning system fails during the hottest days of summer, you need immediate assistance. Our 24/7 emergency service team responds quickly to restore your comfort when unexpected breakdowns occur. We arrive promptly with the expertise and equipment needed to diagnose and repair your air conditioning system, delivering reliable repairs that get your indoor environment back to comfortable temperatures fast.