2-30
TM 3-4230-209-20&P
TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
WATER HEATER (CONT)
WATER HEATER DOES NOT HEAT WATER (CONT).
Step 8. Fuel pump and ignition drive motor and combustor motor run, combustor will not light.
a. Check igniter in the combustor chamber. Clean igniter and check clearance of spark gap. Install igniter and
start again (p 2-208).
b. Check fuel pressure gage on heater control panel for pressure reading. If fuel pressure is low, clean fuel pump screens
and adjust. Try operating again. If fuel pressure remains low, replace fuel pump (p 2-205).
c. Check for fuel entering combustor nozzle spray assembly. If no fuel entering nozzle area, notify intermediate direct
support maintenance.
Step 9. Water heater operates but sputters.
a. Check fuel source level. Refill fuel supply.
b. Check fuel hose assembly at the supply end and at the.
water heater to make sure connections are tight. Reseat
connections.
c. Restart heating cycle. If still sputtering, apply a coat of
grease around the connections. If sputtering stops, an air
leak is present. Continue to operate and then notify inter-
mediate direct support maintenance to repair.
