Should thermostat be on run or auto?

Author: Miss Gabrielle Wiza  |  Last update: Saturday, July 12, 2025

Choose "AUTO" for energy savings and "ON" if you want constant air circulation or improved air filtration. Temperatures can soar or plummet depending on the time of year. Throughout the year, it is important to have reliable heating and cooling systems in order to keep your home supplied with cool or warm air.

Is it better to keep the thermostat on auto or on?

The reason they suggest leaving it on auto is so the unit can run at peak efficiency. Allowing the unit to have control over the fan speed generally leads to more consistent temperatures, better dehumidification, and energy efficiency.

What mode should my thermostat be on?

You'll want to have your thermostat set to heat mode in the wintertime and air conditioner auto mode in the summertime. In order for your system to run on auto mode, you'll need to have either the heat mode or cool mode on. This way, your thermostat knows whether to turn on the furnace or the air conditioner modes.

Should thermostat be left on auto?

Your Thermostat is in the AUTO Position

Keeping your thermostat in the AUTO position means less overall energy is being used—and that reduces your utility bills considerably.

Should I set my thermostat on run or hold?

The best way to save money is by combining both. The “run” feature lets you preset the temperature when you're not home to prevent wasting money on cooling or heating an empty home. Meanwhile, the “hold” button lets you change the room's temperature without changing your energy-saving, preset schedule.

Should I set my thermostat fan to on or auto

What does run on a thermostat do?

On the other hand, the “run” button is what you would use to return your system to its regular program. If, for example, the unusual warm spell you're experiencing is over and the weather goes back to being frigid, this button tells your HVAC to go back to its original plan of keeping the house at 68 degrees.

What is the most efficient way to set a thermostat?

Thermostat Operation

The smaller the difference between the indoor and outdoor temperatures, the lower your overall cooling bill will be. You can easily save energy in the winter by setting the thermostat to around 68°F to 70°F while you're awake and setting it lower while you're asleep or away from home.

What happens when you put the thermostat on auto?

AUTO means that the fan turns on automatically only when your system is heating or cooling air. Once the thermostat reaches the desired temperature, the entire system shuts off until the next cycle. ON means that the fan is constantly on and blowing air when your HVAC system is not heating or cooling air.

Should AC be on auto or on?

There are benefits to having your air conditioner set to “auto” and “on.” The benefits of the “auto” setting include higher efficiency, lower energy bills, better humidity control, less wear and tear on some components, and quieter running.

Should thermostat be on auto in winter?

While the answer is that there are pros and cons to both, I personally recommend using the “auto” function over the “on” function for your furnace fan. The amount of money you save and the boost in energy efficiency is the reason why. I also suggest having a smart thermostat installed in your home.

What should my thermostat be set to in summer?

The U.S. Department of Energy recommends 78° as the best temperature setting for your air conditioner during the daytime. And 82° for sleeping in the summer.

Should the HVAC fan be on auto or circulate?

Which Thermostat Setting Is Best: On, Auto, or Circulate? Given the amount of money it costs in increased utility bills and filter purchases to keep your AC fan running constantly, most of the time, you'll want to keep the fan in the “auto” position.

What does "leave on thermostat" mean?

Wake: The time period when the user rises in the morning. • Leave: The time period where the dwelling is unoccupied during the day hours. • Return: The time period where the user returns at night.

Is auto mode good for AC?

Yes, Auto mode is intended to save energy. The air conditioner can conserve energy and save you money on your energy bills by automatically adjusting the temperature and fan speed based on the ambient conditions and the presence of people in the room.

What does auto mean on a Honeywell thermostat?

• AUTO (automatic) mode

Automatic mode sets the thermostat to follow the temperature program.

Why is my AC constantly running on auto?

The Short Answer Is: When your air conditioning system keeps running and never seems to shut off, the problem could be linked to a number of malfunctioning components – frozen evaporator coils, a clogged air filter, a bad electrical relay switch that needs to be replaced, the fan blowing constantly, dirty condenser ...

Is the AC supposed to be on an auto?

As we stated in a few sections above, it's very important to keep your air conditioner's fan on the auto setting. Some of the reasons behind this choice include: Lowered energy consumption: When your air conditioner's fan is set on auto, it will only run as needed.

Is it better to keep AC on an auto?

AUTO is significantly more energy efficient between the two modes since the fan is only running when your AC is going through its cooling cycle. This takes less power, which is more budget-friendly, with some estimates showing you can save as much as $50 per month just by keeping your AC on AUTO.

What mode should my AC be on?

Cool mode: Ideal for hot days, this mode reduces the room temperature to your desired setting. Dry mode: Perfect for humid conditions, this mode removes excess moisture from the air without significantly reducing the temperature.

Should I set my thermostat on auto or on?

If you're looking for more efficient flow, keep your thermostat mode set to “auto” and add ceiling fans to each room to help the air circulate better around the home. This will help keep your energy bill lower and help reduce the amount of energy you're using, which is better for the environment!

Why is AC not blowing cold air?

First, check your filters and coils for dirt and debris that may be impeding airflow. Once you've cleaned the filters and coils, run the air conditioner with just the fan so that the ice accumulation can melt off. If the AC still doesn't blow cold air, it could be that refrigerant levels are too low.

What damages car thermostat?

Corrosion occurs, among other things if a wrong coolant is used. The corrosion attacks the thermostats aluminum parts that almost "etch away" (see figures 1 and 2). But also mixing of different coolants can cause corrosion. Therefore avoid mixing different types of coolant together.

Is 78 too hot for a house?

Quick answer: The ideal house temperature is room temperature, which ranges from 68 to 78 degrees F, though this may vary from season to season. In winter, the average room temperature is generally 62 to 68 degrees, whereas in the summer, the average temperature is 72 to 78 degrees.

What should your thermostat be set at in the summer?

The best thermostat setting for summer is 78 degrees Fahrenheit when you're at home. Energy.gov also suggests raising your thermostat or turning it off entirely when you are away in the summer. Programmable thermostats can help make monitoring your home's temperature while you're away easy.

What is the most economical way to use a thermostat?

The higher you set your thermostat in the summer and the lower you set it in the winter, the more money you'll save. That said, setting your air conditioner to 78° F and your heater to 68° F is generally a good compromise.

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