How do I determine the age of a WeatherKing air conditoner, heat pump, or furnace from the serial number?

Monday, December 16, 2019

We know of two serial number formats for WeatherKing. For the first: look for the second cluster of digits in the serial number, and the 3rd and 4th number after the single letter is the year of manufacture. The month and year of production also stated clearly in the upper right of the data plate.

    Another variation: look for a single letter in the middle of the serial number, and the 3rd and 4th digits after it are the year of manufacture.

    To determine the size in tons of your heat pump or air conditioner, go to our blog post How do I tell the size in tons of my WeatherKing air conditioner or heat pump?, and for other key specs of your HVAC system, see one of these other blog posts: 

How can I find out the SEER of my air conditioner?

How can I tell whether the condenser (outdoor unit) is an air conditioner or heat pump?  

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 

  To learn more about heating and air conditioning systems, see these other blog posts: 

My air conditioner won't turn on. What's wrong? 

How can I find out the size of my air conditioner? 

Where is the air filter for my central air conditioner and furnace? I can’t find it? 

Does an old air conditioner use more electricity as it ages? 

How did homes stay cool in Florida before air conditioning? 

What is wrong with an air conditioner when the air flow out of the vents is low?

Why has the thermostat screen gone blank? 

Why does it take so long to cool a house when an air conditioner has been off for a while? 

Why is my air conditioner not cooling enough? 

What are the most common problems with wall/window air conditioners?  

Will closing doors reduce my heating and cooling costs? 

   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. 



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