Troubleshooting
Symptom Cause Remedy
No flow or low flow rate
and / or varying
temperatures.
Partially closed stop or service
valve in water supply pipework to
the mixer valve.
Open stop or service valve.
Instantaneous water heater
cycles on and off as the flow rate
or pressure is too low.
Increase water flow rate or
pressure through system
Contact the boiler manufacturer.
Head of water is below the
minimum distance required.
Refer to the specifications
section.
Inlet filter is partially blocked. Clean or replace, flush through
pipework before refitting.
Hot or cold water being drawn off
elsewhere causing pressure
changes or instantaneous boiler
changes.
Do not use other water outlets
when using the shower valve.
Make sure the maintained inlet
pressures are nominally
balanced and sufficient.
If pressures are unbalanced
then a pressure reducing valve
should be used.
Airlock or partial blockage of the
pipework.
Flush through pipework to
ensure removal of debris and
any airlocks.
No hot or cold water reaching the
shower valve.
Check hot and cold feeds (the
valve will shut down if either the
hot or cold supply fails).
Water leaking from
showerhead.
This is normal for a short time
after turning off.
Adjust the angle of the
showerhead as necessary to
vary draining time.
Shower flow control valve failing
to close fully, possibly due to
water borne debris.
Remove flow control valve
assembly and check. Refer to
maintenance section (page 17)
before dismantling shower
valve.
Flow control valve seals
damaged.
Check condition of flow control
valve and replace as necessary
(refer to maintenance section
(page 19).
19
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