HOTSY 771/772 • 8.941-246.0 • Rev. 12/10
PRESSURE WASHER Troubleshooting Guide
16
TROUBLESHOOTING
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION
PRESSURE WASHER
WILL NOT RUN.
Pump switch in OFF position.
Place switch in ON position.
Electric plug not fully
inserted into wall receptacle.
Insert plug fully into
known working receptacle.
GFCI tripped.
Reset GFCI. Refer to instructions on GFCI.
Fuse blown or circuit breaker
tripped in electrical supply line.
Replace fuse or reset circuit breaker.
Use only circuits of adequate capacity.
Motor circuit
overload tripped.
Allow sufficient time for motor to cool
down. Depress red thermal protector
reset button, located on pump motor.
PRESSURE
WASHER RUNS
BUT WON’T SPRAY.
Trigger of trigger gun released.
Squeeze trigger.
Water supply not turned on.
Open water supply valve.
Clogged nozzle.
Clean nozzle opening.
Inlet water screen clogged.
Check screen and clean if necessary.
Pump lost its prime.
Refer to Before Starting, Step 9.
LOW SPRAY
PRESSURE
AT NOZZLE.
Inadequate water supply.
Fully open faucet. Check for kinked or
damaged hose. Use 5/8 inch minimum hose.
Check for debris clogging inlet screen.
Partially clogged
or damaged nozzle.
Clean or replace.
Air being drawn through deter-
gent inlet line.
Refill detergent container. Ensure that pick-up
screen is fully immersed.
UNEVEN SPRAY
PATTERN.
Partially clogged
or damaged nozzle.
Clean or replace.
POOR OR NO
DETERGENT FLOW.
Inadequate
detergent supply.
Refill detergent container. Ensure that pick-up
screen is fully immersed.
Detergent screen
or hose clogged.
Clean. Always start with a clean detergent
container.
Detergent metering
valve not opening.
Check that handle or
knob is not slipping on shaft.
POOR CLEANING.
Improper detergent
concentration
or mixing.
Mix detergent per manufacturer’s
instructions. 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.
