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22
TROUBLESHOOTING OIL FIRED BURNER SYSTEMS
Problem Probable Cause Remedy
Burner fires and
smokes.
Excessive soot on coils. Clean soot off to improve air flow.
Improper voltage at burner Adjust RPM of generator (if equipped)
Burner input too high for
conditions.
Decrease fuel pump pressure and/or
fuel nozzle size.
Discharge water
temperature
exceeds
recommended
operating
temperature.
Water flow restricted. Clean or replace nozzle of proper size.
Descale coil and clear obstructions.
High temperature limit switch
faulty or set too high.
Replace or reset temperature limit
switch.
Faulty Flow, Pressure or
Vacuum switch.
Replace switch.
Burner continues
to fire even when
trigger on spray
gun is released
Faulty fuel solenoid Replace solenoid
Burner input too low for
conditions
Increase fuel pump pressure and/or fuel
nozzle size.
Discharge water
temperature
not reaching
maximum
operating
temperature.
Battery voltage Low. Have battery checked and load test,
charge if low and replace if necessary.
Allow water to cool 2 min. before
shutting off engine.
Battery keeps
losing voltage.
(For 12 volt
burner systems)
Engine RPM too low. Engine RPM should be 3600 RPM
w/no load.
Engine charging system
faulty.
Check engine charging system – Must
have 16 Amp output minimum
Electrodes misadjusted Adjust electrodes to maximum 1/8"
gap.
Fuel pump pressure too high. Fuel pump pressure should be
approximately 100 to 140 PSI.
Air band open too far. Adjust for proper burn.
Burner amp draw too high. Check amp draw of burner motor –
should be 13 amp or less. Check amp
draw of transformer should be 4.2 or
less.
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