- Locating a Furnace Data Plate: The furnace data plate will be in one of the following locations illustrated below. The MOST hidden location is the data plate BEHIND the wiring on the blower enclosure (location number 6):
- Use the ANSI date to confirm the manufacturer date. This will help you confirm that the appliance isn’t OLDER than the ANSI year.
- Use the year the house was built to CONFIRM the appliance year; if the appliance is the same year as the house or within 1-2 years.
Example: A house built in 1978 with a furnace who’s serial number you have researched to be 1977 or 1979 is likely the original furnace and you have the correct year.
You can also most likely rule out an appliance age if your research says the furnace is a 1962 and the house was built in 1978. You probably need to go back and check the serial age again.
- Although not the easiest way to find the date of an appliance, you can visit the manufacturer’s website and try to find a contact phone number. You can try calling with the model and serial number of the appliance and the manufacturer may be able to tell you over the phone.