You are pleasantly surprised that after a heatwave, the weather outside is nearly perfect. So, you turn off your air conditioner and head outside to take advantage of a beautiful afternoon. However, after coming back in a few hours later, you realize that your air conditioner is still running, even though you turned it off. While this is arguably a better situation than having an air conditioner that won’t turn on, it’s still wasting energy and money. So, what can you do to turn off your air conditioner? Or is this a problem that requires the help of a professional?

Electrical issues are the most common cause of an AC unit that won’t stop running and these types of problems typically need to be addressed by a licensed heating and cooling specialist. However, before contacting a professional, you can check your fan to make sure this isn’t the problem.

Sometimes, when cleaning … Read Full Post »

If you take a look at the thermostat that controls your home’s heating and cooling systems, you might notice a switch or button labeled “EM heat.” If you see this, your home probably has a heat pump. The first part of the phrase “EM heat” stands for emergency. The emergency heat setting on your thermostat controls your heating system’s auxiliary heat source, which can be tapped into when outside temperatures drop below a certain threshold—usually anything colder than 35 to 40 degrees Fahrenheit. Now that you understand the answer to the original question—What is EM heat on a thermostat?—let’s learn more about this setting and why it comes on.

When functioning properly, the heating system’s heat pump pushes warm air from inside your home to the outside during hot weather and moves heat to the inside during cold weather. When outdoor temperatures drop into the thirties, however, it can become too … Read Full Post »

Our air conditioners are complicated appliances which serve a vital function in our homes. When they are working properly, we hardly think about them at all. When they aren’t, we realize how much we take our cool, comfortable living spaces for granted. When you notice your air conditioner turning on and off repeatedly, you probably realize something is wrong, but you likely have little clue as to why this is happening, much less what to do about it.

There are a few reasons your air conditioner could be cycling on and off. The first and most likely is that your AC unit is too large for your home. When it comes to choosing an air conditioner, you may have fallen victim to a common misconception: the bigger the better. Unfortunately, unscrupulous contractors have an incentive to add extra capacity “just to be safe”, even when you really don’t need it, since … Read Full Post »

As temperatures begin to climb higher and higher, some homeowners realize that the time has come to purchase a new air conditioner. If you have added to your square footage in recent years or had ongoing heating and cooling issues, you may ask yourself: How many tons of AC per square foot do you need to keep your home comfortable and your energy bills low? Buying the right size AC unit for your space is critical for anyone who wants a unit that will work efficiently and last for years. If you install an AC that’s too small, it won’t be powerful enough to cool your living space effectively. This will run up your electricity bill and could potentially burn out the motor and other components as the unit stays on for prolonged periods of time, churning out cool air in vain.

If you install an AC unit that’s too large, … Read Full Post »