The first and second digits are the year and the fourth and fifth digits are the month of manufacture. Using the first, second, third and fourth digits of the serial number 9709088872 you will find the year and month of manufacture. (This serial number was transcribed from an actual unit during a furnace repair). *This page was last updated: 24 July 2009 * Email us information or pictures of data/nomenclature plates of the unit and we will attempt to assist you in your determinations. In addition perhaps you have come across a brand, model or serial number format that we have not addressed. For this reason if you find during your research that we may have erred please contact us. Anytime anyone is dealing with numbers and letters in determining data, mistakes and misinterpretation are bound to happen. **Goodman – How to determine the age or manufacture date **Įvery effort is undertaken to offer you correct and concise information to assist you in determining the age or manufacture date of HVAC equipment. Here is a great site to get information about HVAC equipment age. ![]() I already had this information concerning Goodman furnace age. ![]() First two digits of the serial number are the year.
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