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400 400A Lighting Procedure

Use the link below to download our Beckman/Rosemount 400 or 400A lighting procedure.

Here are some typical reasons for lighting failure:

  • Not enough fuel getting to burner (clogged fuel restrictor at burner base)
  • Glow plug is bad (or glow plug transformer has failed)
  • Thermistor is bad (or not plugged in)
  • Not enough air (oxygen) to support combustion (clogged air restrictor at burner base)
  • Air leak in chimney (typically the assembly separates from the burner base during shipping causing a leak & dilution of the fuel)