Troubleshooting - Moen 3371 Service Manual

Problem
No flow or reduced flow
No flow or reduced flow
Outlet water
temperature too high
Outlet water
temperature too high
Leak from around the
cartridge
Leak from around the
cartridge
All hot or all cold water
No temperature stop
detected
TROUBLE SHOOTING
Description
Reduced flow or
no flow from device
Reduced flow or
no flow from device
Water is hotter than
105˚F at safety stop or
120˚F in full hot
Water is hotter than
105˚F at safety stop or
120˚F in full hot
Continuous leak from
behind trim
Continuous leak from
behind trim
Temperature
adjustment does not
provide mixed
temperature
Handle rotates greater
than 200˚ and does
not engage a stop
Cause
Stop stems are closed
Blocked screens on
cartridge
Cartridge is out of
calibration
Missing or damaged
bottom o-ring
Cartridge has missing
or damaged top
o-ring.
Missing or loose
cartridge nut
Inlets are reversed
Temperature limit stop
is not properly seated
in the valve
page 5
Fix
Turn stop stems
counterclockwise
Remove cartridge and
rinse. See "Cartridge
Servicing" (pg 9).
Remove cartridge and
rinse. See "Cartridge
Calibration" (pg 7).
Replace cartridge.
See "Cartridge
Servicing" (pg 9).
Replace cartridge.
See "Cartridge
Servicing" (pg 9).
Replace or tighten
cartridge nut.
See "Cartridge
Servicing" (pg 9).
Reinstall with hot water
line to hot side of the
valve and cold water
line to cold side of the
valve.
Reassemble
temperature limit stop.
See "Cartridge
Servicing" (pg 9).