Age of my airco furnace - Heating & Cooling

The serial number is located on the data plate.
Here is a web page describing how to decipher the year of manufacturer. (They have used different formats throughout the years).

https://www.building-center.org/intertherm-hvac-age/

I found this reference which may shed some light ... or maybe not!

"The WBS2-100/90 is a three burner counterflow/downflow furnace. Its filters are located through the blower compartment at the top of the furnace. Make sure that the furnace power switch or circuit breaker is turned off. Remove the upper door by lifting up and out at the bottom. Remove the screw holding the small panel to the right of the chimney; again, up and out. This gives you full access to the two filters.
One filter is a custom-made 10" x 16" x 1" disposable fibreglass filter that lays horizontally on two rails above the blower. It is pushed against the left side of the furnace when properly installed. The other filter is a 15" x 20" x 1" standard disposable fibreglass filter that is fitted vertically in a rail just above the blower partition (compartment base) and leaned towards the blower, contacting the upper filter at the top.
Many of these furnace models have had their upper filters replaced with a 12" x 16" x 1" standard fibreglass filter that is often available at the smaller hardware stores. The 15x20 filter is not used as the 12x16 provides a complete seal at the top of the furnace. (Just as if it was planned.)
Replace the panels and turn the power back on.
The WBS2 is a reliable furnace with quality parts and a good design. It is a "standard efficiency" model with a rated AFUE (Annual Fuel Utilization Efficiency) of 55%. However, if the furnace is in a dedicated furnace room off the garage, as many are here in the Lower Mainland, the off-time losses are considerably reduced. This furnace is one worth keeping until the heat exchanger shows signs of rusting and pitting at the top of the clamshells."

look for production plate to get a proper manufacter date

The age will be in the serial number

See this... http://www.nachi.org/forum/f20/age-nortron-electric-furnace-19948/
and you might call them at this... http://www.broan.ca/product-category.asp?CategoryID=100066

Hello, The model number for Ruud/Rheem equipment is located in the 12-13 digits, these appears to be a 1994. I have seen some furnaces with an age older than when the home was built (a 1995 furnace in a home built in 2000), so good job checking the serial number. This gives you the age it was manufactured.
Hope this helps James

gas valve or curcuit board needs replacement but check to see if the fuse on the board is blow

Hi, W/D here.
Make the necessary sketches, showing what color wire goes to which terminal (trust me on this, it's a really good idea). I do it whenever two or more wires are involved, and I've been known to also lable terminals with the wire color with a "Sharpie". Remove the motor and start capacitor. Take both with you to your local appliance parts supply house. They will match you up with a similar motor, and match the capacitor to the new motor. Getting the exact motor you described isn't important. Getting a good quality replacement motor with your horsepower rating, shaft size and matched capacitor is. They'll have it, and the cost will be less than running one down. I installed a replacement in a furnace last week, with the motor, capacitor and a pack of crimp-on terminals (I ran out!) costing about $109.00. Your's may be less at 1/6 hp. The one I installed was 1/3 hp, replaced a GE, and works fine.
Best regards, --W/D--

The gas lines will as you know have air in them. AFter trying to start several times the heater will lockout.. I would suggest turning power off to unit and turning back on to reset.. Try several times until gas finally gets to unit... did this work ?

it is down to cost how old is it , is it worth it over the cost of a new heater you will neede to speak with a plumber to see what is best to do with this heater as they can look at the heater and advice you .