How low is too low for AC?

In short, the 20-degree rule of air conditioning states that you should always keep your AC unit at no more than 20 degrees lower than the outside temperature. It means that, if the outdoor conditions are at 95 degrees, you should set your thermostat at no less than 75 degrees.

Is 65 too low for AC?

The lower limit

Even when the temperature outside isn't at heatwave levels, we recommend you don't lower the AC's setting below 68°F. This temperature is already more than cool enough for most people, and many will find it too cold.

How low is too low for air conditioner?

Lowering the temperature below 77° or 78° is typically ineffective and will cost you a lot of money. Because the AC's motor only runs at one speed, it will quickly exceed a comfortable temperature and continue to operate for longer, using more and more energy as it does so.

Is 72 degrees too low for AC?

When setting your thermostat, most homeowners find 72 is a good temperature for air conditioning. However, you may need to adjust that setting based on weather conditions. The bigger the difference between indoor and outdoor temperatures, the higher your energy bill will be.

Can I run my AC at 68 degrees?

Finding Your Ideal Temperature

The ultimate answer to, “How cold is too cold?” may be 68 degrees, but to maintain home comfort without wasting energy, keep your thermostat between 72 and 78 degrees. If you're comfortable at 78, then try bumping it up to 79 … and then 80.

R134A AC System Pressure - How to Spot the Issues!

Will AC freeze up if set too low?

But there's truth to this—an air conditioner can suffer from coil-freeze with the thermostat lowered too far. It's more likely to occur at higher altitudes, such as more than 5,000 feet above sea level.

Is 63 too cold for AC?

What Temperature is Too Cold for Air Conditioners? HVAC manufacturers usually recommend that users do not operate their units for prolonged periods of time if the temperature is lower than 65 degrees Fahrenheit.

Is it OK to set AC to 70?

If you want to feel good, as in comfortable, many people will want to lower their thermostat to the low 70s in summer. But if you're talking about saving money on energy and limiting your environmental impact, 70 degrees Fahrenheit is a very bad temperature for your AC to reach.

Is AC at 70 too cold?

It's best to not set your thermostat lower than 70 to 72 degrees. Most units are not designed to cool a house below that point, and you risk the system freezing up. I recommend trying to keep your house below 80 degrees at all times during the summer.

Is 60 too cold for AC?

Air conditioners are not designed to operate in or produce temperatures below 60 degrees. Truth be told, they're happiest around the 68 degree mark. Most thermostats simply won't allow you to choose a setting below this mark.

Why won t my AC go below 68?

Many residential split system AC units are not designed to operate below 70 degrees. If turned to below 70, then the indoor A coil may accumulate ICE, and once it starts, it'll simply freeze A coil over (usually in the middle of the night!).

Is 75 too low for AC?

Typically, our bodies are most comfortable when the air inside our home is 74-76 degrees. So, a safe setting is 75 degrees. However, this is only necessary when you're in your home.

Is 69 too low for AC?

Turning your AC to 69 degrees is getting relatively close to the “danger zone” for causing it to freeze up and break. Typically, we recommend keeping your thermostat set to no less than 68 degrees. Since 69 is above that temperature, it would most likely be safe.

Can I run my AC at 62 degrees?

HVAC manufacturers typically advise users not to run their units for extended periods if the temperature is below 65 degrees Fahrenheit. If you need to test your unit, you should do so after the weather has been risen to 60 degrees Fahrenheit for at least three days.

Is 62 too low for thermostat?

If you're gone during the daytime, you can set the temperature lower for a total of about 16 hours per day. Unless there are health problems in your family, 62 degrees should be comfortable if you're wearing long sleeves or a sweater. Let comfort dictate how low you initially set the thermostat.

Can I set my AC to 65 at night?

Sleeping in a room with the air conditioner set to an appropriate temperature is important for quality sleep. The ideal AC temperature for sleeping is around 65°F (18.3°C).

How cool should my house be if it's 110 outside?

The majority of air conditioning units are designed to only cool the air about 20 degrees from the outside temperature. If the temperatures outside are approaching triple digits, you should set your thermostat at about 78°.

Why won t my AC cool below 70?

A dirty air filter

Your air filter is designed to trap contaminants in the air before it gets pulled into the AC system. But over time that means that your filter gets dirty and clogged. And if a dirty filter isn't replaced, it can seriously limit your AC's cooling power.

Why does 70 feel cold in my house?

Your house could be cold due to an old air filter, a faulty furnace, improper insulation, or leaky ductwork. The simple fixes, like replacing an air filter, are relatively easy to complete.

What should AC be set at in summer?

You want to be comfortable this summer without spending a lot of money on air conditioning, right? While you ultimately must decide what temperature you feel comfortable at, the US Department of Energy and Energy Star suggest that the best AC temperature is 78°F for summer days.

Is 62 too cold for a house?

The World Health Organization (WHO) recommends indoor temperatures of at least 64°F (you can drop that down to 62°F at night if you're really looking to save on your heating bill). But if you have infants, sick or elderly people in your household, then it's recommended that you keep the thermostat set at 70°F.

What is the lowest you should set your thermostat?

How Low is Too Low to Set My Thermostat? If you're going to be leaving your home or traveling for the winter, it's best to keep your thermostat set no lower than 55 degrees. If you don't, you could risk having your pipes freeze over.

Is 65 too cold for house?

Even if you keep your temperature between 60°F and 65°F, your home or apartment may not be warm enough to keep you safe. This is a special problem if you live alone because there is no one else to feel the chilliness of the house or notice if you are having symptoms of hypothermia.

Is 50 too cold for AC?

It's advisable to turn on your AC if the temperature is about 59 degrees Fahrenheit or higher. This way, the oil that lubricates the parts of the AC will warm up before running through the equipment. Also, this practice will ensure there's no ice inside your condenser before you turn it on.

What temp will cause AC to freeze?

Air conditioners are designed to function in a specific temperature range. If you are running your air conditioner when the outside air is below 62 degrees, then the pressure inside of your system will drop and this can cause your air conditioner to freeze up.