We have a Rheem 80 plus furnace that was installed in 1989. Yesterday I
noticed that when the furnace came on, it was blowing cold air. I took a
closer look and noticed that the flame never lights up. This model does
not have a pilot but has an igniter. The gas supply is fine since I can
smell gas when the thermostat switches the furnace on.
Any suggestions as to what the problem might be and what I could look at
would be appreciated.