FAQs

Do you have a question about your heating, cooling, or HVAC system? Gregg’s Heating & Air LLC has the answer. We have compiled some of the questions that we encounter most often in our line of work. Check out these questions and give us a call today for more information and a free estimate! We respond within 30 minutes to an hour and can provide emergency service within 2 hours.

Why does my furnace smell hot when I first run it in the winter?

While your heating system sits idle throughout the summer, dust can build up on the heat strips. The first time you run it in the winter, that dust burns off harmlessly.

How often should I change my HVAC filter?

For optimal efficiency, you should change a standard 1"-thick furnace or air conditioner filter every month. We recommend changing it when you pay your electric bill.

Some filters claim to last longer than a month, but changing them often is still a good idea.

How often should I have my HVAC system serviced?

Having your heating and air conditioning system serviced twice a year keeps it operating at peak efficiency. When you have us inspect and maintain it at the beginning of the upcoming winter or summer, it's ready for the stress.

Why is my electric bill higher in the winter?

If you have a heat pump system and the outside temperature is below 32°, the heat pump uses electric heat strips to back up the pump. These consume three times as much electricity.

Does mowing my lawn hurt my air conditioner?

Debris from mowing can obstruct intakes that your air conditioner needs to operate efficiently. When leaves, lawn clippings, and other debris obstruct the airflow, the equipment has to work harder.

We recommend sweeping away and washing off anything that might be blocking the vents or the coil on your outdoor AC unit.

What can I do if my heating or AC locks up?

A minor obstruction can cause your HVAC system to shut down or freeze. Turn the thermostat to the Off position and the fan to the On position, and check the filter to see if it needs to be changed. You should also check for anything near the return that might obstruct the airflow.

If that doesn't work and the system looks clear, please call Gregg's Heating & Air LLC for prompt service. Emergency services are available!

Can I cool down my building more quickly by setting the thermostat to 60°?

No. Your air conditioner only operates at one speed. Setting your thermostat to a lower temperature will not make it work any faster.

This is also true for heating systems. Setting them to 100° would not heat the building any more quickly.

The energy-efficient way to make your home or business comfortable is to set the thermostat at the desired temperature and let the equipment work as it was designed to work.

Tips to Help HVAC Equipment Operate More Efficiently

There are several things you can do to help your residential or commercial heating, air conditioning, or HVAC unit operate more efficiently.


  • Maintain Free Airflow — All heating and cooling units need good airflow. If you have an outside air conditioner (a condenser), do not build a roof less than five feet above it. Do not install any landscaping (like flowers, shrubs, or retaining walls) within three feet of it.
  • Balance Your Temperature to Reduce Costs — In the winter, leaving your thermostat set at one temperature helps you save on your electric bills. In the summer, you can cut costs by setting your AC temperature two degrees higher when you're out of the house during the day.
  • Have Us Perform Regular Maintenance — When you have Gregg's Heating & Air LLC service your HVAC system every year, we can spot minor issues before they turn into large problems and costly repairs.
  • Change Your Filters on Schedule — Dirty filters raise your utility bills! If the unit has to work harder to pull new air through a clogged filter, it operates less efficiently and costs more to run. Change your filters monthly, and keep the return air grille clean as well. Do not obstruct return air grilles with plants or furniture.

Contact Our HVAC Company for More Information

If you have any further questions about the services that our team provides, we invite you to reach out to our office. Our professionals understand how important it is to work with the right heat and AC company. Tennessee experiences four distinct seasons, including hot summers and cool winters. We need to be able to trust our HVAC systems to work properly throughout the year. Choosing the right heating and air conditioning provider is essential to keep your property comfortable and energy-efficient. At Gregg’s Heating & Air LLC, we are committed to providing reliable solutions and answering all your HVAC-related questions. Whether you need routine maintenance, system installation, or have concerns about improving your indoor air quality, our team is here to help. Trust us to deliver professional knowledge, complete transparency, and personalized service to meet your heating and cooling needs whenever you need them. Contact us today for tailored support and peace of mind.

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