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Maintenance
Use caution with skin contact to hot water
to reduce the risk of scald injury. Before
servicing the valve, turn the water off
using the stops on the iBox Universal Plus
or at the main shutoff.
• Inspect the check valves and filters at least once
per year. Replace if dirty or worn.
• Should the volume of water decrease over time,
inspect and clean the filters on the thermostatic
cartridge. After reassembly, set the high
temperature limit stop and justify the handle.
Troubleshooting
Symptom
Insufficient water
Crossflow: hot water forced into
cold water supply or vice versa
when mixture is closed
Output temperature does not
correspond with temperature
marked on handle
Safety stop button not operating
Handle hard to turn
Shower or spout dripping
Temperature regulation not
possible
• To prolong the life of the themostatic cartridge,
regularly run it through its full range of
temperatures.
• If you have questions, please contact Hansgrohe
Customer Service at 800 334 0455.
Possible Cause
– Supply pressure inadequate
– Cartridge filters dirty
– Showerhead or handshower
filter dirty
– Check valves dirty or worn
– Handle not justified
– Water heater set too low
– Button and/or spring are dirty
or worn
– Cartridge dirty or worn
– Diverter cartridge dirty or
worn
– (new installation) Hot and
cold supplies are reversed -
should be hot/left and cold/
right
– Thermostatic cartridge dirty
or worn
If the shower will not be used for an
extended period of time, turn off the
water to the shower valve by using the
service stops in the iBox Universal Plus
rough, or at the main shut off.
– Check water pressure
– Clean the filters
– Clean the filter
– Clean check valves, replace
if necessary
– Justify the handle
– Increase the hot water
temperature
– Clean spring and button,
replace if necessary
– Replace cartridge
– Clean or replace diverter
cartridge
– Purchase reversing cartridge
#92373000 or correct the
plumbing
– Replace the thermostatic
cartridge
Suggested Action
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