WATER HEATER MAINTENANCE PROCEDURES (CONT'D)
Burner Head Assembly (Contd)
Inspect for broken, cracked, and distorted holder and for damaged
Inspect spark plug electrodes for burned spots, and
inspect insulation for cracks, breaks, and lines (etchings).
Check for broken or distorted gaskets.
Inspect for clogged, cracked, and excessively worn nozzle.
nozzle for carbon deposits, and adapter for damaged threads.
Inspect nipple and elbow for damaged threads.
Inspect for broken or cracked sight glass, stripped or damaged
threads on the cap, and leaking gaskets.
Inspect sight tube for
Inspect scanner tube, bushing, coupling and close nipple for
damaged threads. Inspect for clogged or obstructed tube.