Mammoth – How to determine the age or manufacture date
Every effort is undertaken to offer you correct and concise information to assist you in determining the age or manufacture date of HVAC equipment. Anytime anyone is dealing with numbers and letters in determining data, mistakes and misinterpretation are bound to happen. For this reason if you find during your research that we may have erred please contact us. In addition perhaps you have come across a brand, model or serial number format that we have not addressed. Email us information or pictures of data/nomenclature plates of the unit and we will attempt to assist you in your determinations. Email
This page was last updated: 9 August 2009
Mammoth
Contact Mammoth: Nordyne Corporate Headquarters, 8000 Phoenix Parkway, O’Fallon, MO 63146
Phone:
Manufactured By: Nordyne
Serial Number format: GSD010700023 (All Nordyne Brands have serial numbers that are 12 digits long and start with a letter).
(This serial number is fictitious).
Using the fourth, fifth, sixth and seventh digits of the serial number GSD010700023 you will find the year and month of manufacture. The fourth and fifth digits are the year of manufacture and the sixth and seventh digits are the month. This unit was manufactured in July, 2001.
Year of manufacture: GSD010700023
Month of manufacture: GSD010700023