TM012 Rheem Electric Water Heaters Service Instructions REV: B
Date of Issue: 03/06
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20
Fault Finding Chart 3
3
Has the
usage pattern
changed recently? i.e.
additional appliances
or people using
hot water
Insufficient Hot Water
Is the
heater of
sufficient size for the
customers ongoing
needs?
YES
Refer to Rheem sizing guide
Recommend a water heater of
sufficient capacity to meet
customers needs
NO
Recommend a hot water
usage pattern that will suit the
water heater and the
customers needs
YES
Is
the T&PR
valve continuously
discharging
water?
NO
Is
the water
supply pressure
more than 80% of the
T&PR valve
rating?
YES
Fit pressure limiting valve if not
already installed
Existing pressure limiting valve
faulty - Replace
Faulty T&PR valve - Replace
YES
Is
the correct
T&PR valve
fitted?
NO
Replace T&PR valve with one
of the correct pressure rating
Do not use reconditioned
T&PR valves
NO
Are
there any
plumbing leaks,
crossed connections
or dripping
taps?
NO
Check for crossed water
connection
Replace T&PR valve
YES
Repair any leaks
Isolate crossed connections
YES
Does
the outlet water
temperature correspond
with the thermostat
setting?
NO
Is the
model a Rheem
Plus?
NO
Is a
tempering valve
fitted?
YES
3.2
YES
Replace the thermostat
3.1
YES
Is the
element orientation
correct?
YES
Refit the element correctly
NO
Check inlet diffuser (if fitted) is
not restricted, missing or
damaged
Check dip tube is not missing,
broken or incorrectly fitted
NO
NO
