TEST OR INSPECTION
Check FUEL PRESSURE gage for correct fuel pressure indica-
tion (100-106 psi).
If fuel pressure is not correct, refer to MALFUNCTION 10 (NO
HEATER FUEL PRESSURE).
If fuel pressure is correct, proceed to step 5.
Check for high water temperature.
If water temperature has exceeded the temperature specified on the
THERMOSTAT SELECTOR switch, burner will extinguish and cannot
be relit until water temperature is decreased to below 40°C.
Continue operating pump until water temperature is decreased
attempt to reignite burner.
If water temperature is not above thermostat setting, proceed
Check for contaminated fuel.
If fuel is contaminated, replace fuel with fresh, uncontaminated fuel.
Drain contaminated fuel from fluid filter bowl (refer to page 3-21).
If fuel is not contaminated, proceed to step 7.
Check for proper fuel.
If diesel fuel is in the heater fuel container, observe temperature of
heater fuel container.
If container is cool to touch (approximately
60°F (15°C) or colder), replace fuel with MOGAS.
If fuel is correct, notify organizational maintenance.
Check for fouled burner spark plug.
Regap to .070.
Clean spark plug.
If spark plug is not fouled, notify organizational maintenance.
BURNER LIGHTS AND EXTINGUISHES WHEN START BURNER SWITCH IS
Check for correct water temperature and pressure.
If outlet water temperature is too high for thermostat selector set-
ting (see MALFUNCTION 13, step 5), continue to pump water until
system has cooled.