HOTSY 555HE • 9.808-140.0 • Rev. 10/19
PRESSURE WASHER Troubleshooting Guide
12
IMPORTANT
If the pressure washer demonstrates other symptoms or the corrective actions
listed do not correct the problem, contact the local authorized Hotsy Service
Center. The Hotsy Service Center can be identified by visiting
www.hotsy.com
PROBLEM
POSSIBLE CAUSES
CORRECTIVE ACTION
PRESSURE WASHER
WILL NOT PRODUCE
HOT WATER
Water must be spraying for burner
to light
Squeeze trigger. Water must be spraying for
burner to light.
Defective pressure switch
Replace pressure switch.
Fuel valve closed
Check that fuel valve on fuel tank is open.
Clogged fuel filter
Replace fuel filter.
Thermostat set too low
Adjust thermostat to desired temperature.
BURNER SMOKES
Air bands need to be adjusted
Adjust air by opening or closing the air flap
until smoke spot value is 1 or lower.
A) SMOKES WHILE
UNIT IS RUNNING
Improper fuel
User proper fuel.
Low fuel pressure ˂140 PSI
Adjust fuel pump pressure to specifications.
B) SMOKE AT
COLD-START WHEN
BURNER IS OFF
Weak fuel pump
Check fuel pump pressure. Replace pump if
needed.
Fuel filter partially clogged
Replace as needed.
Soot build up on coils
Clean coils with soot remover.
Lime build up in coils
Clean inside of coils using Hotsy’s coils
cleaner.
Improper burner nozzle
See combustion assembly breakdown.
Electrode is misaligned
Realign electrodes to specs.
Fuel pressure is to high for clean
burn (fuel PSI above 140 but less
that 200)
Reduce fuel PSI/increase air and band set
for cleaner burn without max water heat loss.
POOR CLEANING
Improper detergent concentration
or mixing
Mix detergent per manufacturer’s instruc-
tions. Ensure that powdered detergents are
fully dissolved.
Wrong detergent for the application Select appropriate detergent.
Rinsing with hot water
A final rinse with cold water will reduce water
spotting.
TROUBLESHOOTING
