I have a nine year old horizontal tappan gas furnace with electronic
Ignition. I have two main issues. Bear in mind I replaced the
Thermostat last year and the flame sensor.

Issue #1 The furnace won't ignite. The main blower runs (and is
Problem #2 as it won't shut off) There is a steady red light on the
Control board but the yellow light doesn't ever flicker. I don't hear
The other blower evaculate any gases and the igniter doesn't glow.
There is no gas odor. I have turned on and off the main power to the
Furnace and nothing. I replaced the batteries in the thermostat and I
Do have gas supplied as my gas water heater works fine.


Is it possible that a broken ignitor is the issue? If the igniter
Doesn't work, would the system act the way its acting now? I cleared
Out any cob or spider webs from the plenum and other orifices.


Issue #2 The main blower won't shut off. I have banged on the fan
Limit switch housing to no avail.

Could this be the thermostat? I have heard I should jumper R to W on the circuit board to see if the ignitor would glow. If this is correct, its just a matter of attaching a wire to the two terminals right? And I should pull off the wires that are already there before I jump? I have a suspicioun that it's the thermostat but I have also heard it's a safety limit switch.

I can't call a "pro" as I was laid off last Friday and money is a serious concern.

Any guidance would be helpful.


THanks


Dave Rimmer
Independence Missouri