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What Temperature To Set An Air Conditioner to in Winter

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If you are new to the world of indoor cooling, you may want to learn what temperature to set an air conditioner to during winter. Some of the best air conditioners, after all, can still assist during the colder months to aid in your comfort level at home. So why would you bother setting a temperature during the winter, what type of AC should not be used during the winter months, and what is the right solution for you? Keep reading to find out.


  • If you have a window unit or portable AC unit, remove them and store them in a safe place during the winter.
  • If you have a reversible central AC unit or HVAC system, access the programmable thermostat to engage the heat pump and regulate the indoor temperature.
  • Experts recommend setting the thermostat for an ideal temperature between 68 to 75 F during the winter months to save on energy bills.

Setting Your AC Temperature During Winter

If you are wondering what is the coldest temperature for an air conditioner, the answer is likely an open window during the winter. In other words, take out window AC units during the winter instead of learning what temperature to set an air conditioner when you’re away. For central AC units, it depends on whether or not have a heat pump or not, if you wonder what is wrong with your air conditioner.

And, regardless of what unit you have, if the temperature is set too low, you can bet your air conditioner never stops running.

Insider Tip

If you have a reversible system, don’t forget to change out the air filters even during the winter months.

Portable air conditioning units, on the other hand, follow the same rule as a window unit. Remove the exhaust hose from the window and store the unit in an unused area of the home.

Tips to Use a Central AC During Winter

A central air conditioner must still be maintained and, in some cases, used during the winter. Here are some tips.

Access the Heater

The vast majority of central systems are complete HVAC units with integrated heat pumps. This is called a reversible air conditioner. If that is the case, access your thermostat controls to turn on the heater during those chilly winter months. To save on energy costs, set your thermostat to the lowest temperature you can stand, with experts recommending anywhere between 8 to 75 degrees Fahrenheit. This allows you adequate heating without breaking the bank.

Turn Off the Cooling

While the heating portion of your HVAC system is absolutely crucial during the winter, the cooling element is not. Make sure it is turned off via the thermostat controls or any integrated settings apparatus affiliated with your smartphone or remote control. This will save on energy costs as you won’t be accidentally engaging the compressor or related components. You can also see how a ceiling fan vs ac compares, to save on energy. Our Pioneer mini split review may be helpful if you are considering a more energy-efficient cooling option.

Cover Sensitive Components

If you live in a snowy area, cover up the outdoor unit during the winter months. This will prevent ice from forming on the exterior and will minimize the amount of accumulated debris. If you have a portable indoor/outdoor model like the one in our Honeywell 525 729CFM Evaporative Cooler review, try to bring the model inside your home during the winter.


Is it best to keep my home temperature low all day?

The thermostat settings depend on energy usage and what season you are in. For an energy-efficient system, keep the thermostat in winter set low and in summer set high. If you have windows that let in a lot of direct sunlight, keep them open during the day to let more natural heat into your home.

How can I improve furnace efficiency?

Make sure to change out the air filters to maintain energy efficiency. Also, pay attention to body temperature. If you get too hot, turn the furnace down.

Aside from using the AC, what are the other things that can help warm up a home during winter?

Invest in a smart thermostat, and don’t forget to access the temperature settings to regular the indoor temperature. Also, keep an eye on energy usage as compared to a comfortable temperature.

STAT: If your air conditioner has a functioning heating element, it is considered a reversible air conditioner, so you can also use it to heat your home. (source)

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