Table 2-2. Unit Troubleshooting (Continued)
TEST OR INSPECTION
Check for restriction in fuel hoses.
If fuel hose is restricted, disconnect hose and remove restriction.
If fuel hose is not restricted, proceed to next step.
Check for proper fuel pressure.
WATER HEATER BURNER FAILS TO IGNITE OR IGNITION IS DELAYED. (Cont)
If pressure is out of range, adjust fuel pump pressure to 100 to 125 psi (690 to
862 kPa). Refer to paragraph 2-39.
If pressure is correct go to next step.
Check for clogged fuel nozzle.
If fuel nozzle is clogged, clean or replace fuel nozzle. Refer to paragraph 2-36.
If nozzle is not clogged, proceed to next step.
Check for water in fuel by draining a small amount of fuel from filter into a clear
container. Look for fuel/water separation.
If water is present, drain fuel supply and refill with proper fuel. Refer to
If water is not present, proceed to next step.
Check for carbon deposits on electrodes.
If electrodes have carbon, clean electrodes. Refer to paragraph 2-36.
If electrode porcelain has breaks or cracks, replace electrode. Refer to
If electrodes are clean and unbroken, proceed to next step.
Check for proper adjustment of electrodes.
If electrodes are out of adjustment, adjust electrodes. Refer to
If electrodes are not out of adjustment, proceed to next step.