31
troubleshooting
SYMPTOM
PROBABLE CAUSE
REMEDY
Detergent will not
siphon into Low
Pressure Detergent
Mode
Detergent strainer is not
completely submerged in
detergent solution.
Check, submerge if necessary.
Detergent strainer
obstructed.
Inspect, clean or replace.
Detergent hose cut,
obstructed or kinked.
Inspect, clean or replace.
Detergent adjusting knob
turned to closed position.
Open adjusting knob. Refer to
“Cleaning with Detergents”.
Grip on adjustable nozzle is
not in low pressure mode.
Turn grip counterclockwise to
move to low pressure.
Nozzle assembly is plugged. Clean or replace.
Too many high pressure
hose extensions attached to
the water outlet.
Use one extension maximum.
Ball & Spring in Venturi
stuck.
Remove, clean or replace.
Water flows back into
detergent container.
Ball & Spring in Venturi
reversed, missing or
corroded.
Remove, clean or replace.
Water flows from the
nozzle when the trigger
gun is locked in the
“OFF” position
Trigger gun is
malfunctioning.
Repair or replace.
Water is leaking under
heat exchanger coil.
Safety Relief device is
relieving caused by an
unloader or pressure switch
problem.
1. Detect and correct unloader
or pressure switch problem.
2. Replace safety relief device.
NEVER run unit without safety
relief device. Doing so can cause
an explosion!
Burner will not ignite
Switch is not turned on.
Check switch position.
Out of fuel.
Refuel.
Trigger gun is closed.
Open trigger gun for pressure.
EMF Drive belt loose or
broken.
Adjust or replace as necessary.
Flexible coupler broken.
Replace.
Dirty or clogged fuel filter
Replace
Fuel pump sucking air.
Tighten all fuel intake
connections. Eliminate leaks in
intake line.
Fuel pump inoperative.
Check pressure, replace if
necessary.