This may also show an actual manufacturer's date, depending on the company that made the furnace. Look at the interior of the metal door for a label or tag listing the furnace's serial number. Pull off the removable door on the outside of your furnace this is usually along the bottom of the front of the unit. Use this number for locating replacement parts or referring to the model of your furnace. But itâs does allow for a far greater level of confidence for Selmer owners and enthusiasts. The number after will be the model number of your Heil furnace. The improved serial number chart is by no means flawless. Look for the line that states ' Model Number' or 'M/N'. Secondly, how long does a furnace last? 15 yearsĪlso Know, how do you read a Heil model number? Please click 'Accept', as that is the way I am compensated by JA for my service to you. I hope this answer has been helpful to you.

If it is in excellent condition, its current retail (replacement) value is approximately 500. The 8th digit of the serial number, which will be a letter (and typically the next to last digit) denotes the year of manufacture for units manufactured from the 1980s to the early 1990s: The serial number indicates that your Armstrong (Conn-Selmer) flute was built circa 1965.Armstrong was purchased by Dan Henkin, the owner of Conn, in 1981 and saxophone production moved to the. Armstrong didnt build saxes in-house until the 70s, so the serial number chart is only applicable to flutes at that point.

Part Number Part Description Part Link 10F73 Contactor View Lennox Part 10F73 66C67 Relay View Lennox Part 66C67 65G46 Transformer View Lennox Part 65G46. How do I tell the age of an Armstrong Air furnace or air conditioner from the serial number? Every Armstrong alto Ive seen from that era and that plant was a re-branded Conn. Lennox/Armstrong/Concord and Ducane WHP1-311-1 Parts. In your case, the serial number is 7 digits with no prefix.Īlso, how do I read my Armstrong Air serial number? The 'prefix' serial numbers you mentioned on Armstrong flutes are 2 digits, a dash, plus 5 more digits.

Armstrong serial number chart