97-6574 • HOTSY 900-1400 GAS FIRED • REV. 10/05
PRESSURE
W
ASHER
T
roub
leshooting Guide
18
TROUBLESHOOTING
TROUBLESHOOTING GUIDE
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION
Pressure washer will not
produce hot water.
(continued)
Inadequate water supply.
Fully open faucet. Check for kinked or
damaged hose. Use 5/8" minimum hose.
Check for debris clogging inlet screen.
Trigger of trigger gun released.
Squeeze trigger. Water must be spraying
for burner to light.
Thermostat set too low, or defective.
Raise thermostat setting. Replace if
defective.
Manual gas valve not open.
Turn ON gas valve.
Defective gas valve.
Replace gas valve.
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.
Clogged detergent injector check
valve.
Clean check valve at detergent injector.
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.
Detergent valve not opening.
Check that handle or knob is not slipping
on shaft.
Unloader cycles when
trigger gun is opened or
closed.
Air in system.
Open and close trigger gun several times.
Unloader defective.
Replace if defective.
Water leak between unloader
valve and trigger gun.
Check fittings, hose and trigger gun for
leaks. Repair or replace.
Burner smokes or has
obnoxious odor.
Stack restriction.
See
Venting
under
Installation
.
Pressure relief valve leaking.
Excessive pressure due to
defective unloader valve.
Replace unloader valve.
Defective relief valve.
Replace relief valve.
Dirty relief valve.
Clean relief valve seat.
