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9 Air Conditioner Myths You Really Need to Stop Believing

Last updated: 09-17-2020

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9 Air Conditioner Myths You Really Need to Stop Believing

9 Air Conditioner Myths You Really Need to Stop Believing
Nick Gerhardt
1/9 SLIDES © romarti/Shutterstock
You don't need to clean fins and coils
Air conditioning evaporator coils and fins allow heat to pass from the refrigerant in the system into the air, just as condenser coils absorb heat from inside the house. This important process of moving heat can be impeded by layers of dust and grime. If you never check on your coils, that grime is costing you money and decreasing efficiency. Clean your air conditioner at the beginning of the warm season and check it from time to time, especially after storms or high winds, to make sure your coils and fins stay clear. Did your air conditioning start to smell bad all of a sudden? Here's what might be causing it .
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2/9 SLIDES © Lopolo/Shutterstock
Turn your temperature lower for quicker cooling
This common mistake comes from the old days when many homeowners didn’t know how their AC systems worked. People frequently turned their thermostats really low, thinking the AC would cool the room or the house faster. It doesn't. The AC works just as hard to lower the temperature by one degree as it does to lower it by 20. It’s just a matter of time and the settings you have chosen. So program your thermostat to exactly where you want it, not lower than you need. Don't have AC? Here's how you can cool your house down without it .
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3/9 SLIDES © Christian Delbert/Shutterstock
The bigger the unit, the better
AC units are carefully sized to the amount of cubic feet they need to cool. That’s particularly important when purchasing a new AC unit or renovating your house. If an AC unit is rated for a smaller space than you have, it will work too hard to cool the air, wear out more quickly, and struggle to meet the demands of the thermostat. If the AC unit is rated for a larger space than you have, it will constantly turn on and off, wearing itself out and growing undependable over time. Pay attention to capacity and pick the right unit for the space you have. Here's how you can lower your air conditioning costs .
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4/9 SLIDES © Pavel L Photo and Video/Shutterstock
Better to let an air conditioner run until it quits
The initial cost of replacing your AC unit is high, but that doesn’t mean you should avoid a new purchase. Don’t make the mistake of keeping your old air conditioner longer than you should. An old air conditioner will perform poorly, cost you more money in repairs, and eventually become more trouble than it’s worth. If your AC unit is ten to 12 years old or older, investing in a newer, more efficient version will save you money and aggravation over time. Did you know that knowing some AC tips and tricks can help you lower your energy costs too ?
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5/9 SLIDES © Serenethos/Shutterstock
Close the vents in rooms you don’t use
Usually this does not save energy. The way a residential heating and cooling system is designed, the air handler (or blower) moves a certain amount of air no matter which vents are open or closed. Closing registers may reduce the total air moved by the blower, which reduces its efficiency.
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6/9 SLIDES © Family Handyman
Your AC unit is ready for summer without prep
Nope! Before the really oppressive heat arrives, make sure your air conditioner is ready to get to work. You may need to clear out dirt and debris, check the coolant level, and replace the fan filter. In addition to your AC unit, here are some other things you should clean in your home .
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7/9 SLIDES © wavebreakmedia/Shutterstock
Your AC will give you a cold
Viruses, not cool temperatures, cause colds. The idea that being cold—or going outside with wet hair—can make you sick is one of the old wives' tales that should be debunked .
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8/9 SLIDES © Family Handyman
Leaving the temperature at the same setting all day will save money
You can cut five to 20 percent off your energy bill by setting your cooling system four to six degrees warmer when you’re at work or on vacation, and automatically lowering it to 78 degrees when you’re home. Learn about more home improvement myths that need to be busted .
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9/9 SLIDES © Family Handyman
Fans will cool you down
Ceiling fans save you money by keeping you comfortable at higher thermostat settings. Each degree higher than 78 degrees will save you five to ten percent on air conditioning costs. The moving air from a ceiling fan increases the amount of evaporation from your skin and helps cool you off. Is your AC acting up? Next, check out the 10 air conditioning mistakes you can't afford to make .
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