Visit our HEATING AND AIR CONDITIONING page for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.
Will closing doors reduce my heating and cooling costs?. What are the most common problems with wall/window air conditioners?. Why is my air conditioner not cooling enough?. 
Why does it take so long to cool a house when an air conditioner has been off for a while?. Why has the thermostat screen gone blank?. What is wrong with an air conditioner when the air flow out of the vents is low?. How did homes stay cool in Florida before air conditioning?. Does an old air conditioner use more electricity as it ages?. Where is the air filter for my central air conditioner and furnace? I can’t find it?. How can I find out the size of my air conditioner?. To learn more about heating and air conditioning systems, see these other blog posts: How can I tell whether the condenser (outdoor unit) is an air conditioner or heat pump?. How can I find out the SEER of my air conditioner?. How can I tell the size in tons of an American Standard air conditioner or heat pump from the model number?. To determine other key specs of your HVAC system, see one of these other blog posts: 
To determine the size in tons of your Oxbox unit, see our blog post How do I find the size in tons of an Oxbox air conditioner or heat pump from the serial number? For the age of another brand or manufacturer, go to our blog post How do I determine the age of my air conditioner? You'll find this code beneath the scratch-off. The prepaid card contains a code you use to obtain your serial number and download your product. Note: For Elements products, the serial number is on the Windows DVD sleeve. The serial number is a 24-digit numeric code. For example, 213251638J would mean manufacture in 2021. Find your serial number on the disc sleeve or on the product box. The first two numbers in the serial number of an Oxbox unit is the year of manufacture.
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