All Suburban Serial Numbers manufactured after January 1990, will be nine digits. The first two (2) digits signify the year of manufacture. The next set of digits, indicate the week of the year and the remaining digits are serial numbers.

Compatibility:Suburban Furnace
SF-20 25 30 35 42 SF-20 25 30 35 42F(ABOVE SERIAL NO. 934701426,ENDING SERIAL NO. 210651046)
SF-20 25 30 35 42Q SF-20 25 30 35 42FQ SHD2542 SHD2542Q

Electrode Type:Single