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?.Sometimes it’s the first two numbers, or second two. Go to the outside unit (condenser) and look for the metal plate or sticker on the side with the manufacturer’s data. Where is the air filter for my central air conditioner and furnace? I can’t find it? The date of manufacture is encoded in the serial number on the data plate of almost all air conditioners.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?įield Guide for Home Inspectors, a quick reference for finding the age of 154 brands of HVAC systems, water heaters, and electrical panels, plus 210 code standards for site-built and manufactured homes, and the life expectancy rating of 195 home components.How can I find out the SEER of my air conditioner?.To determine other key specs of your HVAC system, see one of these other blog posts: However, there are a few models shown online that have the year of manufacture at the third and fourth numbers after the “V” so, if the first two numbers don’t seem right, you may have to determine which pair of numbers makes more sense-based on condition of the unit, year of construction or remodeling of the home, and year of approval seal by a certified testing lab as marked on the data plate.įor the age of another brand or manufacturer, go to our blog post How do I determine the age of my air conditioner? If you need to determine the size of the unit, go How do I find the size in tons of a Midea heat pump or air condtioner from the model number? And to figure out what all the other numbers listed on the condenser data plate mean, go to our blog post How do I understand the air conditioner or heat pump condenser label (data plate)? Here’s a diagram of the sequence from a Midea owner’s manual. So the serial number V 193157328 indicates production in 2019. Find the series of numbers and letter that follow the word Serial on that data plate. Looking to the left side of the in house cabinet or the top of the blower deck. You can find the Lennox serial numbers and model numbers of your furnace by removing the top-front support panel. The first two numbers after a the letter “V” are the year of manufacture. Serial Number Location on Lennox Furnace.
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