HOT SURFACE IGNITERS

DIAGNOSTIC OHMS READINGS

PART NUMBER            DESCRIPTION                COLD OHMS

025-32626-000            CARBORUNDUM                 100+

025-32625-000            NORTON LOW-TEMP         40 TO 400

025-33421-000            NORTON MINI                      50 TO 300

025-30860-000            SMART VALVE                     3 TO 10

-COLD “OHMS” REFERS TO THE READING OBTAINED WHEN THE IGNITER IS NOT HOT (room temperature)

-READINGS FALLING WITH IN THESE RANGES INDICATES A GOOD IGNITER

-WHEN REPLACING AN IGNITER, CHECK THE OHMS OF THE NEW IGNITER BEFORE INSTALLING IT TO MAKE SURE IT WAS NOT DAMAGED IN SHIPPING.

-READINGS OUTSIDE THESE RANGES INDICATES A BAD IGNITER

-NORTON MINI IS IGNITER USED IN THE 473-20937-001 KIT

-SMART VALVE IGNITER IS PART OF THE PILOT ASSEMBLY BUT CAN BE CHECKED SEPARATELY TO SEE IF IT IS GOOD

An igniter that has aged and is ready to fail will show:

1. Higher degree of oxidation, the igniter will be close to white
2. Hot spot with heavy oxidation, usually in the center of the igniter akin to a knuckle.