TM 10-4520-259-13&P
Table 3-1. Operator Troubleshooting Procedures - Continued
Malfunction
Test or Inspection
Corrective Action
Step 4.
Check water supply in water heater tank.
Fill tank with water if not full.
Step 5.
Check flame safeguard control lockout switch.
Reset flame safeguard control switch.
Step 6.
Check blower motor overload switch.
Reset blower motor overload switch.
Step 7.
Check motor contactor in control box.
If tripped, reset contactor.
Step 8.
Check that water temperature thermostat is set high enough to start the heater.
Increase thermostat setting.
2.
FLAME FAILS IN BURNER.
WARNING
Exposed fuel and fuel vapors can ignite or explode resulting in
severe injury or death. Observe proper safety precautions when
servicing fuel systems. Ensure water heater is cooled down
before servicing fuel system.
Step 1.
Check fuel supply in fuel drum.
If insufficient, fill fuel drum.
Step 2.
Inspect fuel hose connections for leaks.
Tighten fuel hose connections.
Step 3.
Check fuel hose for clogs.
Disconnect fuel hose and clear all foreign matter clogging the line.
3-3
