TM 10-3510-209-24
Table 2-2. Unit Troubleshooting (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
9.
WATER HEATER BURNER FAILS TO IGNITE OR IGNITION IS DELAYED. (Cont)
Step 2.
Check for restrictions in fuel hoses.
a.
If fuel hose is restricted, disconnect hose and remove
restriction.
b.
If fuel hose is not restricted, proceed to next step.
Step 3.
Check for proper fuel pressure.
a.
If pressure is out of range, adjust fuel pump pressure to 75
to 80 psi (517 to 552 kPa). Refer to paragraph 2-37.
b.
If pressure is correct go to next step.
Step 4.
Check for clogged fuel nozzle.
a.
If fuel nozzle is clogged, clean or replace fuel nozzle.
Refer to paragraph 2-34.
b.
If nozzle is not clogged, proceed to next step.
Step 5.
Check for water in fuel by draining a small amount of fuel from
filter into a clear container. Look for fuel/water separation.
a.
If water is present, drain fuel supply and refill with proper
fuel. Refer to paragraph 2-38.
b.
If water is not present, proceed to next step.
Step 6.
Check for carbon deposits on electrodes.
a.
If electrodes have carbon, clean electrodes. Refer to
paragraph 2-34.
b.
If electrode porcelain has breaks or cracks, replace
electrode. Refer to paragraph 2-34.
c.
If electrodes are clean and unbroken, proceed to next step.
Step 7.
Check for proper adjustment of electrodes.
a.
If electrodes are out of adjustment, adjust electrodes. Refer
to paragraph 2-34.
b.
If electrodes are not out of adjustment, proceed to next step.
2-33
