Great Northern Heating and Air
Great Northern Heating and Air
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    • Home
    • Services
      • Boilers
      • Humidifiers
      • Radiant Heat
      • Thermostats / Zoning
      • Ventilation
      • Furnaces
      • Cooling
      • Heat Pumps
    • MiniSplit/Ductless
      • Get to Know Mini Splits
      • Configurations
    • Residential
    • Commercial
    • Financing
    • About
    • Promotions
    • Contact
    • Expert Tips

  • Home
  • Services
    • Boilers
    • Humidifiers
    • Radiant Heat
    • Thermostats / Zoning
    • Ventilation
    • Furnaces
    • Cooling
    • Heat Pumps
  • MiniSplit/Ductless
    • Get to Know Mini Splits
    • Configurations
  • Residential
  • Commercial
  • Financing
  • About
  • Promotions
  • Contact
  • Expert Tips

Expert Tips

Summer Energy Efficiency Tips

In terms of keeping your air conditioning costs down, it pays to use every tool in your toolkit. Here are energy efficiency tips to reduce costs associated with your AC this summer.


  • Use window treatments. Light is also heat. Use curtains, drapes or other window treatment options to reduce the impact of sunlight on the heat of your home. Be sure to close curtains before you leave for the day to keep warm light out.
  • Keep your home sealed. Inspect windows, doors, and vents to prevent warm outside air from entering your home. You can use caulk or weather-stripping products to seal leaks near doors and windows. Of course, be sure to close all windows before turning on your AC!
  • Use a programmable thermostat. Set your thermostat to automatically adjust your cooling schedule based on your daily habits. Increase the thermostat setting while you’re away and reduce it only when you’re home for the evening. Learn more about programmable thermostats.
  • Use ceiling fans at the right time. Ceiling fans do help keep you cool, but they are only effective when moving air over a room’s occupants – that’s you. If you’re not in a room, turn off ceiling fans to save energy.
  • Remove humidity fast. Air conditioners remove humidity every time they run, but always use your bathroom ventilation fan to quickly remove humidity after a bath or shower. This can help keep indoor humidity levels low and more comfortable.

How to Reset an Air Conditioner When It's Not Working

If you’ve ever been in a situation and asked an IT professional why your computer isn’t working, they may have responded with a question: “Have you tried restarting it?” Like many appliances around your house, air conditioners are getting smarter and sometimes require a good old-fashioned reset. Even older models that suddenly stop working can benefit from a reset, especially after a power outage.

How to Reset an Air Conditioner

  1. Power down your AC. Start at your circuit breaker panel and flip the breaker that powers your AC. Also, flip the power switch your AC unit is connected to outside to the off position.
  2. Find the button. Most air conditioning units are equipped with a reset button. These buttons tend to be red and quite small. If you’re having a tough time finding it, consult your owner’s manual. (If you can’t find it, most are published online for quick reference).
  3. Hold down the reset button for 3 to 5 seconds and then release.
  4. Restore power to your AC. Flip all switches, including the one in your breaker panel to the on position.

You’ve successfully completed a reset! Next, go to your thermostat and make sure it’s set to “cool” and a temperature that’s lower than the current temperature inside your home. After a few seconds, your air conditioner should start up. Place your hand by the vents to confirm that cold air is blowing through your ductwork.

Finding Reset Button on AC Units

In most cases, this button is small and red, situated on or near the unit. Look for the clearly labeled 'reset' button. Upon locating it, press the button for approximately three seconds and monitor the air conditioner. Verify if the AC starts operating immediately; if not, press the button again for an additional three seconds. Your AC should emit three beeps and restart promptly.

If you are having difficulty finding your air conditioner unit reset button, review the manufacturer's manual or search online to identify the reset button's placement on your particular model.

Why Do I Need to Reset My Air Conditioner?

The most common reason for an AC unit needing a reset is when the protection circuit breaker in your AC unit kicks in. This typically happens after a power outage and is in place to prevent fires and explosions. A reset can also correct an AC that’s only blowing warm air, even when the thermostat is set to “cool.” There are a handful of reasons your AC could be blowing warm air, but one of them is a general thermostat error. Sometimes a hard reset of your AC can solve that problem.


While resetting an air conditioner is generally an easy task, if you are uncertain or uncomfortable, please contact an HVAC professional to assist by requesting an appointment with Great Northern Heating and Air. As a final thought and precautionary note, accessing your reset button may require you to open your condensing unit plan and with certain units, this could impact your warranty. Please check your warranty guidelines before attempting to reset your air conditioner. 

Air Conditioner Size

When it comes to air conditioning, size really does matter. An air conditioner that is too big for your space may cool it down quickly, but there are some major cons that can come with too large a unit.

Air Conditioner Too Big?

When an air conditioner cools a room too quickly, it will cycle on and off more frequently. This can put much more wear and tear on a system compared to one that is appropriately sized Plus, you’ll spend more on maintenance and repairs. Whenever the unit is running, you’re likely consuming more energy than necessary to keep the room cool.

Air Conditioner Too Small?

A unit that is too small will run around-the-clock. This will drive up your energy bill Plus, it may never reach your desired temperature, meaning you’ll have an uncomfortable summer. As the cooler months come to an end, it’s time to prep for the summer heat. For some, it may be time to install a new air conditioning. When making the decision, there are a lot of things to consider, including price, brand, and energy rating. One thing that should never be overlooked is the size of your air conditioner, as getting the right size can make a huge difference.

What to Consider When Sizing a Central Air Conditioning Unit:

· Square footage of the space you want to cool 

· The climate in your area

·  Your home’s insulation 

· The layout of the rooms in your home

When you are choosing a central unit, it pays to consult an HVAC professional who can consider all these factors and present you with the pros and cons of choosing between two sizes if you’re right on the borderline.

How to Tell If Your AC Unit Has Mold

It most often starts with a smell. Mold in your AC unit or AC vents may not be visible, but the steady buildup of mold can spread mold spores that cause nasal congestion, throat irritation, coughing, and an odor that you notice every time the unit kicks on.

For your health and for your nose, it’s important to take the time to find out whether there’s mold in your air conditioning ducts or the AC unit itself.

How Dangerous Is Mold in an AC Unit?

Having mold in your air conditioning system is no more or less dangerous than having mold in any other place in your home. The difference—and the danger—is in airflow. Mold in air conditioning ducts can quickly spread through your HVAC ducts and linger in any room in your home with air vents. As a result, mold spores can impact your health anywhere, as opposed to being a more isolated problem when limited to a single room like your basement or attic.

Is There Mold in My AC Unit?

The smooth metal surfaces of AC units and air vents are not well-suited to mold growth, but mold can still grow on metal if it can find organic elements to consume, like human and pet dander found in household dust.

It’s not always easy to tell if your AC unit has mold. Many homeowners rely on a few signs of mold, including:

  • A musty or mildewy odor that tends to get worse when the AC unit is on
  • Black or dark-colored dust on or near air vents
  • Visible mold buildup on AC or air vents
  • Visible mold in other parts of your home

Mold spores that have spread throughout your air ventilation system can create new mold deposits in other moist areas of your home. If you discover mold indoors, it’s always worth inspecting your air vents and AC unit for mold that may have contributed to the spread.

How to Clean Mold In a Central Air AC Unit

Mold in a central air conditioning unit requires professional service. If you discover mold in your central air unit, stop using the unit immediately. You may also turn your thermostat’s fan function off to reduce the amount of air being circulated in your home.

Preventing Mold in HVAC Systems

AC units create moisture during normal operation. The key to preventing mold in your AC unit and its spreading throughout your HVAC system is to keep a careful eye on excess moisture buildup. Make inspecting drains, drip pans, intake vents, and air vents a regular part of your HVAC maintenance routine.

The more frequently you use your air conditioner, the more important it is to check for the signs of mold. This could be as often as every other week, depending on the moisture levels of your climate. Annual HVAC inspection from Great Northern Heating and Air will also reduce the risk of developing mold.

What’s a Good Air Filter for Allergies?

There are many manufacturers who make air filters for allergies, but not all filters are created equal. For individuals with severe symptoms, every allergy mitigation effort is worth it. Finding the best air filter for seasonal allergies is one way to help minimize symptoms and get back to enjoying life.

How to Choose the Best Air Filter for Your Allergies

Tackling dust and dander or seasonal allergens like ragweed and tree pollen require just the right filters. Most airborne irritants are tiny, but even microscopic allergens vary widely by size and that impacts how effective filters are at removing them from the air.

Along with filter-specific rating systems like Minimum Efficiency Reporting Value, allergy sufferers should also look at the Clean Air Delivery Rate, or CADR. This measures the rate of clean air moved through your HVAC system and into your home.

One rule of thumb for determining the appropriate CADR is the 2/3 Rule. This means you’ll need a device with a CADR of two-thirds of the square footage you’re looking to filter. A 1,200 square foot home should have a CADR of 800 or more.

Which Air Filter Is Right for You?

Air filter performance is very heavily impacted by its material and construction. As you’d expect, the top-performing air filters for allergy sufferers may cost a little extra, but you’ll be glad you made the investment.

Here’s how a few types of air filter materials stack up:

Fiberglass Air Filters

Also called “spun glass” filters, fiberglass is the most common type of air filter material used due to its low cost and longevity. However, these are not the best filter for individuals with allergies. They capture less than 10% of allergens in your home, which means they’ll do little to help ease symptoms.

Pleated Fiberglass Air Filters

Pleated fiberglass filters include an additional layer of cotton and polyester to improve filtration. They’re slightly more expensive than traditional fiberglass filters but do a much better job removing allergens. Depending on the CADR and MERV ratings, pleated filters remove between 20% and 50% of allergens.

HEPA Air Filters

High-efficiency Particulate Air (HEPA) filters are considered the best option for allergy sufferers because they remove 98% of airborne pollution. Used in portable air purifiers, HVAC systems, or whole-house air purifiers, HEPA filters are so thick they require an especially powerful fan (or two!) to push air through. These are the most expensive air filters and aren’t compatible with all devices or systems. Check with Great Northern Heating and Air to see if a HEPA filter will work in your HVAC system.

The Verdict: What Is the Best Air Filter for Allergies?

HEPA filters deliver the best performance overall, but may not be suitable for your home’s HVAC system. Read your owner’s manual or contact the manufacturer to find the highest-rated filter compatible. Find the highest MERV rating compatible with your HVAC system and use a clean portable air filter to offset seasonal allergies when needed.

One size never fits all. Find the filter and cleaning regimen that makes the biggest difference in your symptoms and stick with it!

And remember, finding and using the best air filter for your air purifiers and HVAC system is only part of the solution. There are many other ways to reduce allergy symptoms:

  • Dust and vacuum frequently.
  • Wash bedding weekly.
  • Keep windows closed during allergy season.
  • Replace your HVAC filter more often during allergy season.


Get Allergy Relief from the HVAC Pros


Allergies don’t have to ruin your summer fun! With the right air filters for your air purifiers and HVAC system, the allergy sufferers in your home can breathe a little easier.


The friendly, professional technicians at Great Northern Heating and Air can help you choose the right filter and make other air quality improvements. Call (406)-471-7560 today! 

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Great Northern Heating and Air

173 Lauman Road, Kalispell, MT 59901, USA

406-471-7560

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