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9.800-079.0 • Rev. 01/18
PRESSURE WASHER Troubleshooting Guide
16
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
SOLUTION
BURNER WILL
NOT LIGHT
(continued from
previous page)
Burner nozzle is clogged
Clean as required.
Thermostat has malfunctioned
Test and replace if needed.
Fuel solenoid has malfunctioned
Test and replace if needed.
MACHINE
SMOKES
Fuel is improper or water is in fuel
Drain tank and replace contaminated fuel.
Air adjustment is improper
Readjust air bands on burner assembly.
Fuel pressure is low
Adjust fuel pump pressure to specifications.
Burner nozzle is plugged or dirty
Replace nozzle. Check parts breakdown for
nozzle size.
Burner nozzle spray pattern is
faulty
Replace nozzle. Check parts breakdown for
nozzle size.
Coil and burner assembly have
heavy accumulation of soot
Remove coils and burner assembly, clean
thoroughly. Call local dealer.
Electrode setting is misaligned
Realign electrodes to specifications.
Smoke stack has obstruction
Check for blockage or other foreign objects.
Engine RPM is low
Increase RPM to correct specs. See serial
plate.
LOW WATER
TEMPERATURE
Fuel is improper or has water in it
Replace with clean and proper fuel.
Fuel pressure is low
Increase fuel pressure.
Fuel pump is weak
Check fuel pump pressure. Replace pump if
needed.
Fuel filter is partially clogged
Replace as needed.
Soot buildup on coils is not
allowing heat transfer
Clean coils.
Burner nozzle is improper
Call your local dealer for proper nozzle.
WATER
TEMPERATURE
TOO HOT
Incoming water to machine is
warm or hot
Lower incoming water temperature.
Fuel pump pressure is too high
Call your local dealer for proper fuel pressure.
Fuel pump is defective
Replace fuel pump.
Fuel nozzle is incorrect size
See parts breakdown or serial plate for proper
size.
Water supplied is insufficient
Check water GPM to machine.
Water flow is restricted
Check nozzle for obstruction and proper size.
Check serial plate for correct size.
PRESENCE OF
WATER IN OIL
Oil seal is worn
Check and replace if necessary.
Air humidity is high
Check and change oil twice as often.
Packing is worn or bad
Check and replace if necessary.