Table 2-2. Unit Troubleshooting (Continued)
TEST OR INSPECTION
WATER HEATER PRESSURE GAGE INDICATES PULSATING PRESSURE. (Cont)
Check for plugged burner nozzle.
If nozzle is plugged, replace burner nozzle. Refer to paragraph 2-36.
If nozzle is not plugged, proceed to next step.
Check for defective fuel pressure gage by substituting suspect gage with a known good
If gage is defective, replace fuel
WATER HEATER FUEL PUMP LEAKS.
pressure gage. Refer to paragraph 2-37.
Check for loose strainer cover.
If strainer cover is loose, tighten cover screws.
If strainer cover is tight, proceed to next step.
Check for loose plugs.
If plugs are loose, tighten plugs.
If plugs are tight, proceed to next step.
Check for leaks in shaft seals.
If shaft seals leak, repair or replace fuel pump. Refer to paragraph 2-39.
If seals are not leaking, proceed to next step.
Check for cracks in fuel pump.
If fuel pump has cracks, replace fuel pump. Refer to paragraph 2-39.
If no cracks in fuel pump and problem persists, notify your supervisor.