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Trouble Shooting
Symptom
Water leaking
from shower
head.
Only hot or
cold water
from the
shower valve
outlet.
Control dial
stiff to operate.
No flow or low
flow rate and/
or varying
temperatures.
14
Possible Cause
This is normal for a short time
after turning off.
Shower flow valve failing to
close fully, possibly due to
water borne debris.
Partially closed stop or service
valve in water supply pipework
to the shower valve.
Mixer cartridge is partially
blocked.
Debris/Scale build up.
Check shower head, hose and
inline filters for any blockages.
Partially closed stop or service
valve in water supply pipework
to the shower valve.
Instantaneous water heater
cycles on and off as the flow
rate or pressure is too low.
Head of water is below the
minimum distance required or
insufficient to activate pump
(gravity supply only).
Hot or cold water being drawn
off elsewhere causing pressure
changes or instantaneous
boiler temperature changes.
Make sure the maintained
inlet pressures are nominally
balanced and sufficient.
Airlock or partial blockage of
the pipework (gravity supply
only).
No hot or cold water reaching
the shower valve.
Remedy
Adjust angle of shower head
in holder as necessary to vary
draining time. Clean shower
head.
Remove cartridge and check.
See page 10 before
dismantling shower valve.
Open stop or service valve.
Clean or replace, flush through
pipework before refitting.
See page 10.
Clean as necessary. See page
12 - 13.
Open stop or service valve.
Increase water flow rate
or pressure through
system. Contact the boiler
manufacturer.
Raise the cistern or fit a
universal booster pump.
Refer to pump manufacturers
guidelines.
Do not use other water outlets
when using the shower. This
shower is not thermostatically
controlled and flow rates and
temperature will be affected
when other water outlets are
used.
See Water Supply
Requirements page 4.
Flush through pipework to
ensure removal of debris and
any airlocks.
Check hot and cold supplies.
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