Table 2-2. Unit Troubleshooting (Continued)
TEST OR INSPECTION
WATER HEATER FLAME FAILS DURING FIRING CYCLE.
Check for low fuel supply in fuel container.
a. If container is low on fuel, fill container with fuel.
b. If container fuel level is correct, proceed to next step.
Check for leaks in fuel hoses.
If fuel hoses are leaking, tighten couplings or replace fuel
If fuel hoses are not leaking and couplings are tight, proceed
to next step.
Check for clogged fuel hose.
If fuel hoses are clogged, disconnect fuel hose and clear
foreign matter and clogs from line.
If fuel hoses are clear, proceed to next step.
Check for dirt and clogs in fuel nozzle.
If fuel lines are clogged or dirty, clean or replace nozzle.
Refer to paragraph 2-34.
If nozzle is clean, proceed to next step.
Check for defective flame safeguard control. With power off, loosen
thumb screw and remove fire eye cover. Check flame safeguard circuit
board for damage, corrosion, and burnt, loose, or missing purge
If any of these conditions are found, notify your supervisor. If
these conditions are not found, proceed to next step.
Check for clogged fuel pump strainer.
If strainer is clogged, clean strainer. Refer to paragraph 2-37.
If strainer is clean, proceed to next step.