Cleaning The Igniter - Norcold N300.3 Manual

Photo #6
If the bracket is bent or distorted and the tip of the thermocouple just barely touches the flame or
doesn't touch it at all, then it will not be brought up to full temperature and therefore no signal to
signify the presence of a flame will be generated. And then once you release the safety valve
button, it will automatically stop the flow of gas because it thinks there is no flame present. The
presence of debris and burnt particles on the tip of the thermocouple form an insulating jacket or
pull heat from the tip of the thermocouple and prevent it from being brought up to full
temperature. Then the same shut down procedure will happen once the safety valve button is
released.

Cleaning the Igniter:

The igniter is held in place with one small Phillips head screw which is probably the most
difficult screw to access as it tends to be blocked by the thermocouple which may need to be
temporarily removed. There is no need to remove or re-route the wire itself as there will be
enough slack to examine and clean the tip as needed. The tip should be L-shaped with the
shortest portion of the L being held in the flame area just over the flame area of the burner
orifice. Photo #7 below shows the igniter with it screw mounting flange being removed from the
burner box.
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