Westinghouse WPX2700 Instruction Manual page 39

PROBLEM
Pressure washer will
not spray any water or
will spray water but with
insufficient or unsteady
flow rate or pressure.
Water is ejected from the
thermal relief valve whilst
engine is running and
the spray gun trigger is
closed for an extended
period, i.e. idling without
water spraying.
Water is ejected from the
thermal relief valve whilst
engine is running and the
spray gun trigger is open
for water spraying.
POTENTIAL CAUSE
9. High pressure water
connections downstream
from the water pump are
leaking.
10. High pressure hose clogged,
kinked or damaged.
11. Spray gun, lance or spray
nozzle is obstructed.
12. Spray gun is faulty.
13. Pressure pump is faulty.
14. If above possible causes
are checked and eliminated,
pressure washer may be
faulty.
1. This is normal operation to
protect the water pump from
overheating.
1. The water supply temperature
is too high.
2. Thermal relief valve is faulty.
3. If above possible causes
are checked and eliminated,
pressure washer may be
faulty.
SOLUTION
9. Check and tighten the high pressure water
connections. Check the coupling O-rings and replace
if damaged.
10. Clean, re-route, repair or replace the high pressure
hose.
11. Disconnect the spray gun, lance and spray nozzle.
Check each component for internal obstruction and
clean as required.
12. Check the spray gun by testing through-flow with a
garden hose or low pressure (≤ 200 kPa) compressed
air whilst its trigger is squeezed. Replace spray gun if
faulty.
13. Repair or replace water pump.
14. Take pressure washer to an authorised Westinghouse
service dealer.
1. No fault.
1. Provide cooler water supply with temperature below
40°C.
2. Replace thermal relief valve or water pump.
3. Take pressure washer to an authorised Westinghouse
service dealer.
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