INSPECT HEATER PARTS (AVIM)
Check tube and cone assembly (3) for dull, dark
gray areas. If dark area is found, tap area lightly
with ballpeen hammer. Area shall not give soft
response or dull sound.
Position tube and cone assembly (3) inside
combustion chamber (4).
Measure between ground electrode (5) and top
of tube and cone assembly (3) with 6 inch scale.
Distance shall be 1-5/32 inches. If not, bend
ground electrode for proper distance.