Version 3, 14 December 2018, Page
11
of
16
Version 2, 31 October 2019, Page
11
of
16
15.0
TROUBLESHOOTING
PROBLEM
CAUSE
RECTIFICATION
The desired mixed water
temperature cannot be
obtained, or valve is
difficult to set.
−
Hot and cold supplies are fitted to
the wrong connections.
−
Thermostatic cartridge contains
debris or is damaged.
−
Strainers contain debris.
−
Non-return devices are damaged.
−
Refit the valve with hot/cold supplies fitted to
the correct connections.
−
Clean cartridge ensuring all debris is
removed and components are not damaged.
Replace if necessary.
−
Clean strainers of debris.
−
Check non-return device is not jammed.
−
Check for airlocks in the water supply.
The water temperature
selected is cold yet hot
water comes out.
−
Hot and cold water supply
connections are installed in reverse.
−
Refit the valve ensuring the hot/cold supplies
are fitted to the correct connections.
The thermostatic mixing
valve will not shut down.
−
The hot to mix temperature
differential is not 10°C or greater.
−
Thermostatic cartridge
contains debris or is damaged.
−
Non-return devices are damaged.
−
Raise hot water temperature.
−
Clean the cartridge ensuring that all debris is
removed.
Mix temperature
unstable.
−
Flow rate below 2L/min.
−
Thermostatic cartridge contains
debris or is damaged.
−
Strainers contain debris.
−
Non-return devices are damaged.
−
Rectify any pressure deterioration.
−
Clean the cartridge ensuring that all debris is
removed and components are not damaged.
Replace if needed.
−
Clean strainers ensuring debris is removed.
−
Check non-return device is not jammed.
Mix temperature
changing over time
−
Inlet conditions (pressure or
temperatures) are fluctuating.
−
Strainers contain debris
−
Install suitable pressure control valves
to
stabilise
inlet conditions.
−
Clean strainers ensuring debris is removed.
Either full hot or cold
flowing from outlet
fixture
−
Upper temperature ring is not
correctly set.
−
No flow from hot and cold supplies.
−
Damaged check valves.
−
Re-set temperature to between 35-46°C as
required.
−
Check water is switched on.
−
Replace faulty check valves.
Water is not flowing
from outlet.
−
Hot or cold water failure.
−
Thermostatic cartridge.
contains debris or damage
−
Strainers contain debris.
−
Restore inlet supplies and check mix
temperature.
−
Clean the cartridge ensuring that all debris is
removed and components are not damaged.
Replace if needed.
−
Clean strainers.
