Hi, there! Thank you for taking interest in our Lennox 89M83 100335-15 capacitor. Yes, you are correct. Based on the information you provided, you own a Lennox capacitor that has a serial number 1008-003532 and part number 100335-15. Serial numbers (SN) will always be different for every product in the same production line for identification and tagging purposes while the part number (PT) stays the same as to identify the usage and purpose of the product. Thank you and we hope to see you again here at PlumbersStock.com!