If gas flow is present to the igniter and ignition doesn't occur measure for voltage between the 24 VAC common connector pin and the 24 VAC hot pin. If a nominal 24 VAC (19.5 to 26) is not present check the 24 VAC transformer output and replace the transformer with a properly sized, NEMA rated transformer (required for warranty purposes.) If you have the proper voltage to the igniter and it does not glow replace the igniter with a replacement igniter/flame rod assembly Q3400A1024. The igniter and flame rod must be replaced at the same time -they are combined into a one piece assembly and are packaged with a new stainless-steel spring mounting clip. This one unit fits both the Q3450 and Q3480 pilot burners.
# 9 -If the main burner does not light after the pilot has ignited and the igniter has been de-energized:
by Ron Walker
# 9 -If the main burner does not light after the pilot has ignited and the igniter has been de-energized:
- Make certain that the pilot flame and the flame rod are making good contact.
- Check that the pilot burner bracket is not misaligned or bent from its original position
- Use a gas pressure reading instrument (i.e... Manometer etc... ) to check for proper inlet gas pressure. There is an outlet gas pressure tap on the outlet side of the gas valve for this measurement -there is also an inlet pressure tap as well. For natural gas systems, the pressure required is normally .5 inches of water column however check the appliances Manufacturers rating plate to verify the pressure needed on this unit for correct firing
by Ron Walker