Another issue could be the thermostat.Do you hear the spark igniter trying to light? If you hear a clicking sound, the igniter is working but there is no gas or it has a cracked ceramic housing and is carbon cracking which means the spark is not “jumping” to the burner tube, rather following the crack to ground.Does the blower run, but the furnace does not light? If so, this is usually a low 12-volt issue as the blower will run under 10.5 volts.Here are some other questions and troubleshooting ideas: Do the stove top and other LP appliances work correctly? There is a 12-volt fuse in the distribution center and sometimes an inline fuse in the module board on the furnace. This must be checked at the module board with a multimeter.Ģ. The furnace needs at least 10.5 volts DC and sometimes more to open the valve. If your furnace is not starting, you will need to look at the following items:ġ. The spark igniter sends a spark to ignite the flame similar to a manual spark or Piezo in a residential gas grill. When the temperature get down to the specified low, the gas valve opens and LP or liquid propane flows through an orifice to the burner assembly. This model does not actually have a “pilot light,” but rather a direct spark ignition (DSI) that ignites the flame.
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