Frequently Asked Questions | Legacy Heating & Air | A Cook-Family Business
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Frequently Asked Questions

Answers from Our Trusted Michiana HVAC Technicians

In our time on the job, we have worked with countless customers in the South Bend and Michiana areas that have similar questions about their HVAC systems. It is easy to worry when your home won’t heat up as quickly as it should or your air purifier does not fully clear the air of allergens.

Understanding how these systems work can make it a little less intimidating. If you need help with your residential or commercial HVAC system, don’t hesitate to turn to Legacy Heating and Air, Inc. for the professional services you deserve.


If you notice a problem with your Furnace or AC unit, you should contact our technicians before they grow into more expensive situations. However, sometimes there could be a quick fix that doesn’t require a technician. Check out our tips page to learn how you might be able to get your system working without scheduling a service call.

If you notice strange noises, smells, or insufficient heating or cooling, your system most likely needs professional attention. Never try to make any major repairs yourself. Contact our team and we’ll assess your situation and let you know what needs to be done.


Leave these decisions to our HVAC experts. We are a family-owned business that is dedicated to customer service and we will never try to sell you anything you don’t need. During our free in-home estimate, we can take a look at your system and determine whether a repair or replacement is best for your home and your budget.


If you’ve checked to see if a simple fix will solve the problem and didn’t find a solution, reach out to our team, no matter the time of day. We offer 24/7 emergency services and are always here for you. Winters in our area can be brutal and it’s important you always have sufficient heat. That’s why we will always be a quick call away. We also offer same-day service appointments for issues with your furnace.


Yes! We offer our 12-12-12 program: 12 year maintenance, 12 year labor, and 12 year in parts. Contact us at (574) 325-5457 to learn more about this program and about our other incentives.


Though some repairs and replacements are unavoidable and the result of age and regular wear and tear, there are some steps you can take to avoid future problems. Like your car, your HVAC systems require regular maintenance. That’s why Legacy Heating and Air, Inc. offers furnace and AC maintenance services. Our tune-ups will make sure your systems are prepared for the season ahead and will address small problems before they have the chance to grow into larger, more costly fixes.


Furnaces play an important role in keeping your home or business warm, so you may be wondering how these important devices work. Furnaces typically run on natural gas, propane, oil, or electricity. In many furnaces, the air is heated using the energy source and then pushed into the home through ducts and vents.

The thermostat on the furnace activates the device to move more hot air into the property once it determines that the heat has dropped below a certain point. A professional trained in furnace systems understand how to install, repair, and replace heating systems should anything go wrong with this process.


Dry air can have a drastic effect on your health and home. Not only can this cause respiratory irritation, but it can affect the indoor temperature. Humidifiers work with your existing HVAC system to maintain adequate moisture conditions within the home.

Humidifiers have sensors that determine the amount of moisture in the air. If the percentage of water dips below a certain point, water vapor is added to the circulated air until it reaches an acceptable percentage.


Air conditioners help to maintain a comfortable temperature and control humidity within the home. As a part of your HVAC system, your air conditioner plays an important role in helping you maintain comfort.

AC units work by:

  • Moving warm air from the room into the HVAC system through grates;
  • Air flows over pipes filled with coolant fluid to chill the air;
  • This air is pushed back into the room using fans;
  • Heat absorbed from the air as it passed over the coolant is pushed outside using fans; and
  • The resulting air inside the home is cool.


The main purpose of heat pumps is to move hot air from one place to another. It is a heating and cooling device that maintains the temperature of your property.

Heat pumps typically work by moving warm air into the existing ductwork using a motorized fan. Refrigerant is used to absorb the heat as it passes over the system. Depending on whether you need warm or cool air, heat is either moved into the home or pushed outdoors, maintaining the ideal temperature no matter what season.

Still have a question or need to schedule a service? Reach out online or give us a call today!

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