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Troubleshooting
18 Operator’s Manual
Symptom Problem Solution
WARNING: HIGH VOLTAGE. NEVER SERVICE SPACE HEATER WHILE IT IS PLUGGED IN,
OPERATING, OR HOT. SEVERE BURNS AND ELECTRICAL SHOCK CAN OC
CUR.
Heater ignites, but flame-
out control shuts off
heater after a short period
of time.
Heater burns, but puffs of
smoke can be seen.
Heater does not burn
steady.
Heater burns with odor.
Heater smokes continu-
ously.
Wrong pump pressure.
Dirty fuel filters.
Dirt in nozzle.
Dirty photocell lens.
Open or damaged photocell.
Bad flame-out control.
Damaged fan switch.
Wrong pump pressure
Heater almost out of fuel
Water condensation in fuel tank
Wrong fuel
Dirty fuel filters
Air leak in suction system
Dirty nozzle
Low voltage causing motor to
operate below rated speed
Loose fuel line
Adjust pump pressure (see Mainte-
nance: Pump Pressure Adjustment).
Clean fuel filters (Maintenance: Fuel
Filters).
Replace nozzle (see Maintenance:
Nozzle).
Clean photocell lens with clean cotton
swab.
Replace photocell.
Replace flame-out control.
Replace fan switch.
Adjust pump pressure (see Mainte-
nance: Pump Pressure Adjustment).
Add fuel to tank
Check fuel tank for bubbles of water
in bottom. If found, remove fuel (see
Storage). Clean tank and fuel filters
(see Maintenance: Fuel Filters). Fill
with clean fuel
Remove wrong fuel (see Storage).
Clean tank and fuel filters
(see Main-
tenance: Fuel Filters). Fill with correct
fuel
Clean fuel filters
(see Maintenance:
Fuel Filters).
Tighten all fuel line connections (see
Maintenance: Fuel Lines).
Replace nozzle (see Maintenance:
Nozzles).
Check voltage at heater. Voltage at
heater should be not less than 90%
of rated voltage (108V minimum for
120V heaters)
Check and tighten all fuel line connec-
tions (see Maintenance: Fuel Lines).