Rheem TM012 Operating instructions

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SERVICE INSTRUCTIONS
Rheem Electric Water Heaters
TM012
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111 Series - Rheemglas
162 Series - Rheemglas
171 Series - Rheemglas
191 Series - Rheemglas
121 Series - Rheem Plus
411 Series - Optima
462 Series - Optima

TM012 Rheem Electric Water Heaters Service Instructions REV: B
Date of Issue: 03/06
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
2
Contents
Safety Warning....................................................................................................................3
Introduction..........................................................................................................................3
Heater Model Identification..................................................................................................3
Specifications.......................................................................................................................4
Preventative Maintenance ...................................................................................................4
Operation.............................................................................................................................5
Components and their Function...........................................................................................6
Wiring Diagrams..................................................................................................................7
Product Changes.................................................................................................................7
Common Faults ...................................................................................................................9
Fault Finding Chart Index...................................................................................................10
General Fault Finding Chart...............................................................................................11
Fault Finding Chart 1 .........................................................................................................12
Fault Finding Chart 1.1 ......................................................................................................13
Fault Finding Chart 2 .........................................................................................................16
Fault Finding Chart 2.1 ......................................................................................................17
Fault Finding Chart 2.2 ......................................................................................................19
Fault Finding Chart 3 .........................................................................................................20
Fault Finding Chart 3.1 & 3.2.............................................................................................21
Fault Finding Chart 4 .........................................................................................................22
Fault Finding Chart 5 .........................................................................................................23
Fault Finding Chart 6 .........................................................................................................24
Fault Finding Chart 7 .........................................................................................................25
Electrical Insulation Testing...............................................................................................25
Component Replacement Procedures...............................................................................26
Rheem Plus Tempering Valve Annual Service Procedure.................................................32
Exploded View – Single Element Models...........................................................................33
Exploded View – Twin Element Models.............................................................................34
Replacement Parts List - 25L and 50L...........................................................................35
Replacement Parts List - 80L, 125L and 160L...............................................................36
Replacement Parts List - 250L, 315L and 400L.............................................................37
Exploded View – Rheem Plus Components ......................................................................38
Replacement Parts List..................................................................................................38
Rheem Electric Water Heater Warranty - (Australia Only).................................................39
Document Revision History................................................................................................40

TM012 Rheem Electric Water Heaters Service Instructions REV: B
Date of Issue: 03/06
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Safety Warning
The purpose of this Service Manual is to provide sufficient information to allow a person
with the skills as required by the controlling Regulatory Authorities to carry out effective
repairs to a Rheem Electric Water Heater in the minimum of time.
Safety precautions or areas where extra care should be observed when conducting tests
outlined in this manual are indicated by print in bold italics and/or a warning symbol. Take
care to observe the recommended procedure.
Certain diagnostic procedures outlined in these service instructions
require “live” testing to be conducted. Personal Protective Equipment
(PPE) should be worn when conducting these tests to prevent the risk of
electric shock. (Refer to Rheem Safety Procedure on electrical testing)
Plug in models: If the supply cord is damaged, it must be replaced by the
manufacturer or its service agent or a similarly qualified person in order to
avoid a hazard.
Introduction
The information provided in these instructions is based on the water heater being installed
in accordance with the Installation Instructions provided with each water heater.
Should you require further technical advice on a Rheem Electric Water Heater, contact
your nearest Rheem Water Heater Australia Service Department where all genuine
replacement parts are also available.
Heater Model Identification
All identification numbers are designed to convey detailed information about the water
heater to which it is attached. The model number consists of 8 digits.
1 1 1 250 0 8
1 - Rheemglas
4 - Optima
1 - MEPS Compliant
6 - MEPS compliant non simultaneous operation
7 - MEPS compliant right hand water connection
9 – MEPS compliant dual handed connections
1 – Single Heating Unit
2 – Two Heating Units
Rated Capacity in Litres
Top Element Rating
Bottom Element Rating
0 – Not fitted
R – Reduced dia
S – Squat (TAS)
F – Double Plus
2 – 1200w
4 – 1800w
5 – 2400w
6 – 3000w
7 – 3600w
8 – 4800w
9 – 6000w
Note: Model number, serial number and date of manufacture should be quoted in all correspondence.

TM012 Rheem Electric Water Heaters Service Instructions REV: B
Date of Issue: 03/06
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Specifications
Model Maximum Inlet
Pressure (kPa) Water Connections
Series
Capacity
Rated Capacity
(Litres)
T & PR Valve
Rating (kPa)
With ECV
Without
ECV
Bottom T/stat
setting (ºC)
Inlet
Outlet T&PR
Bottom T/stat
Type
Anode Length
(mm)
025 25 1400 960 1120 70 RP¾/20 RP½/15 230
053 50 1400 960 1120 75 RP¾/20 RP½/15 490 / 540*
090 80 1400 960 1120 70 RP¾/20 RP½/15 695
135 125 1400 960 1120 70 RP¾/20 RP½/15 1153
170 160 1400 960 1120 70 RP¾/20 RP½/15 1400
270 250 1000 680 800 70 RP¾/20 RP½/15 1153
340 315 1000 680 800 70 RP¾/20 RP½/15 1400
RHEEMGLAS
111
121
171
191
162
425 400 1000 680 800 70 RP¾/20 RP½/15
Tradesperson Adjustable
1636
270 250 1000 680 800 60 RP¾/20 RP½/15 1153
340 315 1000 680 800 60 RP¾/20 RP½/15 1400
OPTIMA
411
462 425 400 1000 680 800 60 RP¾/20 RP½/15
Consumer
Adjustable
1636
Notes:
121 series available in 125, 160, 250 and 315 litre capacities only
171 series available in 50, 80 and 125 litre capacities only
191 series available in 50 litre capacity only
Top thermostat on twin element models set at 60ºC
* 540mm anode fitted to 111050F and 171050F models only
Preventative Maintenance
It is suggested for peak performance that the water heater be serviced annually.
1. Check for discharge from the T&PR valve. When the element is operating a small
discharge of water may be evident. Operate the valve-easing lever to ensure the valve
opens and resets properly. Always open and close the valve gently. The T&PR valve
should be replaced at 5 yearly intervals.
2. Check for leaks at all tank fittings.
3. Check for signs of excessive corrosion on the water heater jacket.
4. Isolate power to the water heater and check all electrical connections for signs of
overheating due to poor connection.
5. Conduct an insulation test on the water heater. (Refer to page 25)
6. Rheem Plus models: Service the tempering valve. (Refer to page 32)

TM012 Rheem Electric Water Heaters Service Instructions REV: B
Date of Issue: 03/06
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Operation
Single Element Models
Water temperature is maintained via a thermostat switching the active conductor to an
electric immersion element positioned towards the bottom of the cylinder.
When the water temperature within the cylinder falls sufficiently the thermostat contacts
close suppling power to the element.
Once the water temperature reaches the set point of the thermostat, the contacts open
cutting power to the element.
A double pole “manual reset” over temperature cut out is incorporated into the thermostat
to provide additional protection in the event the controlling thermostat contacts fail. The
ECO contacts open between 80ºC and 88ºC.
Twin Element Non-Simultaneous Models
Water temperature is maintained via two (2) electric immersion elements, one (1)
positioned near the top of the cylinder and the other towards the bottom. Only one element
is operational at any time (known as non-simultaneous operation).
A thermostat, positioned adjacent to each element is utilized to maintain water
temperature.
The top thermostat switches the neutral from the top element to the bottom element, this
ensures only one element can be energised at a time. The top thermostat is factory set at
60ºC. The bottom thermostat switches the active to the bottom element only.
Both thermostats incorporate a double pole “manual reset” ECO to provide additional
protection in the event the controlling thermostat contacts fail.
Once the top thermostat senses a temperature of approximately 60ºC the thermostat
contacts open the neutral circuit to the top element (between terminals 1L and 2T),
causing the top element to be de-energised, and close the neutral circuit to the bottom
element (between terminals 1L and 4T).
When the water temperature at the bottom of the tank reaches the set point of the bottom
thermostat, the thermostat contacts open cutting the active circuit to the bottom element.
Under normal usage the top element is unlikely to operate, the water temperature being
maintained by the bottom element. During periods of heavy use when the complete supply
of hot water is depleted the top element will operate to maintain the water temperature at
the top of the tank.
When the bottom element is connected to an off peak tariff full recovery of the tank will
occur whenever power from the off peak tariff is available, usually overnight.

TM012 Rheem Electric Water Heaters Service Instructions REV: B
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Components and their Function
Temperature and Pressure Relief Valve
A valve designed to provide automatic relief by discharging water in case of excessive
temperature, pressure or both.
Never fit a T&PR Valve with a pressure rating greater than that indicated on
the product-rating label.
Pressure Limiting Valve (P.L.V.)
A valve that controls its outlet pressure to a predetermined limit.
Outlet Delivery Tube (Dip Tube)
A plastic tube installed in the hot water outlet of the water heater cylinder to conduct water
from the highest point to the outlet connection. It also acts as a fitting liner.
Inlet Delivery Tube (Dip Tube)
A plastic tube installed in the cold water inlet of the water heater cylinder to assist with
stratification. It also acts as a fitting liner.
Diffuser
A plastic device installed in the cold water inlet of the water heater cylinder to assist with
stratification. It also acts as a fitting liner.
Fitting Liner
A plastic tube installed in the cold-water inlet of the water heater to provide protection
against corrosion through the life of the water heater.
Anode (Sacrificial)
A metal alloy electrode installed in the water heater cylinder that by galvanic action
protects the cylinder from corrosion.
Over Temperature Energy Cut Out (E.C.O.)
A temperature-sensing device in combination with the thermostat that automatically cuts
off the supply of electrical energy to prevent excessive water temperature occurring. This
device will not reset automatically but may be manually reset once temperatures have
fallen to a safe level.
Thermostat
A device, responsive to temperature, which controls the supply of electrical energy to the
element to maintain the stored water at the required temperature.
Heating Unit (Element)
A tubular device containing an electric resistance element that converts electrical energy
to heat. Standard ratings are 1.2, 1.8, 2.4, 3.6, 4.8 and 6.0Kw
Non-simultaneous (Top) Thermostat – Twin Element Models
A device responsive to temperature which controls the supply of electrical energy to the
top element to maintain the stored water at the required temperature. It also switches the
neutral supply between the top and bottom elements to ensure only one element can be
operational at any time. This is known as non-simultaneous operation.

TM012 Rheem Electric Water Heaters Service Instructions REV: B
Date of Issue: 03/06
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Wiring Diagrams
Single Element Models Twin Element Models
Product Changes
Diameter and Height Changes
In April 2003 the jacket diameter on all 80 -160L models was reduced from 492mm to
478mm.
In January 2004 the overall height of single and twin element 400L models (excluding
solar) was reduced by 40mm. As part of this change the inlet fitting was raised 40mm to
maximise delivery and the height of the booster element was dropped 40mm to retain the
same boost volume.

TM012 Rheem Electric Water Heaters Service Instructions REV: B
Date of Issue: 03/06
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In May 2004 the 111050 (LH connections) and 171050 (RH connections) models were
replaced with the 191050 dual handed model. The dimensions remained unchanged.
In October 2005 the 191050 was superseded by the 191G50 to meet new MEPS
requirements. As part of this change the diameter increased from 393mm to 437mm and
the height increased from 670mm to 673mm
In March 2006 the 191G50 (dual handed) models were superseded by the 111050F (LH
connections) and 171050F (RH connections). The F series 50 litres have a double plus
cylinder allowing for a reduction in diameter from 437mm to 393mm making the unit more
suitable for in cupboard installation. The overall height however increases from 673mm to
690mm.
Element Changes
In November 2005 a new design electric element and cylinder element barrel was
introduced to all Rheem electric storage water heaters (refer to fig. 1A & 1B).
The new design elements utilise a new flange, gasket and earthing arrangement and are a
direct replacement for earlier model elements and as such part numbers remain
unchanged.
The new type gaskets (refer to fig.2) will also fit earlier model elements and are now
supplied with the element. These new gaskets have a radius on the top internal edge
allowing a better seal against the element, are shorter overall by 2mm, and have a flange
thickness of 2.15mm instead of 2.25mm.
The new design cylinder element barrels do not have an earthing tab and require the earth
bond to be connected to the earthing tab on the thermostat clamp (refer to fig. 4).
When installing an early or new type element on a cylinder barrel that has an
earth tab, this earth tab must be used (refer to fig.3).
When installing an early or new type element on a new type cylinder barrel
that does not have an earth tab, the earth tab on the thermostat clamp must
be used (refer to 4).
Fig.1A New design element
front view Fig.1B New design element side view Fig.2 New design element gasket
Fig.3. Cylinder barrel Earth tab Fig.4. Thermostat clamp Earth tab
Refer also to Technical Bulletins TB05 019 and TB05 020

TM012 Rheem Electric Water Heaters Service Instructions REV: B
Date of Issue: 03/06
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Common Faults
When a complaint is lodged about the performance of a hot water system there are a
number of causes that should be checked and eliminated. In an attempt to pinpoint the
most likely cause it is important to discuss with the customer their reasons for the
complaint, the duration of the problem, any change in circumstances or usage and recent
weather conditions. This information in conjunction with the following listed common
complaints will assist you in locating the most likely cause. All procedures assume there is
water flowing through the water heater.
Excessive hot water usage
The complaints of insufficient hot water and no hot water can on many occasions be
attributed to hot water usage exceeding the capacity of the water heater to provide hot
water.
When first attending a call of this nature it is essential to establish the probable hot water
usage by querying the usage habits of the household and comparing this with the potential
delivery of the model water heater installed. It can then be established if the usage is
within or outside the capacity of the model. The areas to look at for excessive usage are:
1. Automatic washing machines.
2. Showers exceeding 12 litres/minute for mixed water and 5 minutes in duration.
3. Two or more showers operating at the same time.
4. Change of occupancy or number of persons increased.
5. High water pressure area. (Excessive pressure relief valve discharge).
6. Plumbing leaks.
7. Thermostat temperature setting.
8. Crossed connection.
Mixing or crossed connections
If an automatic dishwasher, washing machine, flick mixer tap, tempering valve or
thermostatic mixing valve is installed there is always the possibility that the cold water
could mix with the hot water through a faulty or incorrectly installed valve. This is referred
to as a cross connection. The complaints of insufficient hot water, water too cold or
excessive discharge from the pressure relief valve may be attributed to a cross
connection. The method of checking for a cross connection is:
1. Turn off the stopcock on the cold water supply to the water heater.
2. Open a hot tap. If water flow is persistent and cold a cross connection exists.
Water hammer
A water heater will not cause water hammer, however valves associated with the water
heater may be the source of the problem i.e. cold-water stopcock, non-return valve or relief
valve.
Most water hammer problems are associated with plumbing, hot and cold or appliances
i.e. solenoid valves, ballcocks, loose pipes, sharp angles in pipe work, faulty or worn valve
parts, loose tap washers or neighbouring equipment.
High water pressure areas will have more complaints of this nature and the use of a
pressure-limiting valve (PLV) to reduce the household cold-water pressure will usually
solve most problems.

TM012 Rheem Electric Water Heaters Service Instructions REV: B
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Hot water plumbing leaks
If hot water has not been used for a period of time, feeling the temperature of the hot water
line may give an indication of water flow if the pipe is warm. The method of checking for
plumbing leaks is:
1. Turn off the stopcock on the cold water supply to the water heater.
2. Open a hot tap to ensure the flow of water stops. This will confirm the stopcock is
operating correctly.
3. Turn off the hot tap.
4. Turn on the stopcock to make up the water pressure in the water heater, and then turn
the stopcock off again.
5. Wait approximately 5 minutes then do either of the following:
a. With your ear close to the stopcock turn it on slightly and listen for any water
passing. If there are no leaks, water should not pass.
b. Open a hot tap while listening for any pressure release. If there is a pressure
release there will be no leaks in the plumbing system.
Discoloured water
This may be the result of discoloured water entering from the cold water mains. Check if
the cold water is also discoloured.
Fault Finding Chart Index
Fault Chart number Page
Single Element Models 1, 1.1 12, 13
No hot water Twin Element Models 2, 2.1, 2.2 16,17,19
Insufficient hot water 3 20
Water not hot enough 3.1, 3.2 21,21
Leaking water heater 4 22
Noisy water heater 5 23
Water too hot 6 24
Electrical insulation test 7 25

TM012 Rheem Electric Water Heaters Service Instructions REV: B
Date of Issue: 03/06
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General Fault Finding Chart
Is
the complaint
for no hot
water?
Fault Diagnosis
YES
1
2
Single element models
Twin element models
Is
the complaint
forinsufficient hot
water?
NO
3
YES
Is
the complaint
for leaking water
heater?
NO
4
YES
Is
the complaint
for water too
hot ?
NO
5
YES
6
NO
Noisy water heater

TM012 Rheem Electric Water Heaters Service Instructions REV: B
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Fault Finding Chart 1
Warning: Terminals may be live,
Personal Protective Equipment
should be worn.
1No hot water - single element models
Is
240 volts
present at the
terminal
block?
Restore power and
advise customer
Using the procedure on page 25
conduct an electrical insulation test
Is
the water
heater connected to
an off peak
tariff?
Possible failure of the off peak
relay or missed signal from
energy supplier. Continue with
diagnosis to confirm water
heater is operational.
YES
Is the
isolating switch
turned
off?
NO
NO
Is the
fuse blown at the
switchboard?
Is the
reading below 1
mega-ohm?
7
YES
NO
YES
YES
Possible fault in household
electrical wiring, continue with
diagnosis to confirm water
heater is operational
NO
Isolate power and continue
with diagnosis procedure NO
1.1
Test 2, 3 and 4
Test 1
YES

TM012 Rheem Electric Water Heaters Service Instructions REV: B
Date of Issue: 03/06
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Fault Finding Chart 1.1
1.1 No hot water - Single element models
Are
the thermostat
contacts
closed ?
Test 6 Is
the water in
the tank at least 6
degrees lower than
the thermostat
setting?
NO
Slide the thermostat out from under the
retaining clamp and allow base to cool
NO
YES
Replace thermostat
YES
Did
the thermostat
contacts
close?
Test 6
Replace thermostat
NO
Does
the element
have the correct
resistance?
YES
Are
the thermostat
ECO contacts
closed ?
Test 5 Install the element
correctly and reset the
ECO
YES
Test 7
Replace element
NO
Is
the overall
resistance of the
water heater
correct?
YES
Locate wiring failure
and repair
Test 8
NO
Water heater
electrically ok 3YES
Is
the element
installed in the correct
orientation?
NO NO
Replace thermostatYES

TM012 Rheem Electric Water Heaters Service Instructions REV: B
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Component Tests 1, 5, & 6
Test 1 Live equipment Personal
Protective Equipment should be
worn when conducting this test.
Using a multimeter on the AC voltage
scale, measure between active and
neutral on the terminal block.
Normal voltage is 240 volts
Test 5 Ensure power is isolated before
conducting test
Using a multimeter on the x1 resistance
scale, measure between terminals 3L
and 4L on the thermostat.
The reading should be less than 1 ohm.
Test 6 Ensure power is isolated before
conducting test
Using a multimeter on the x1 resistance
scale, measure between terminals 1L
and 2T on the thermostat.
The reading should be less than 1 ohm.

TM012 Rheem Electric Water Heaters Service Instructions REV: B
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Component Tests 7 - 9
Test 7 Ensure power is isolated before
conducting test
Using a multimeter on the x1 resistance
scale, measure between terminals 2T
and 4L of the thermostat.
Normal resistance for the heating unit is:
1.2kW: 43-53 ohms 1.5kW: 35-42 ohms
1.8kW: 29-35 ohms 2.4kW: 22-26 ohms
3.0kW: 17-21 ohms 3.6kW: 15-17 ohms
4.8kW: 11-13 ohms 6.0kW: 9-11 ohms
Test 8 Ensure power is isolated before
conducting test
Using a multimeter on the x1 resistance
scale, measure between active and
neutral on the terminal block.
Normal resistance when the thermostat
contacts are closed is:
1.2kW: 43-53 ohms 1.5kW: 35-42 ohms
1.8kW: 29-35 ohms 2.4kW: 22-26 ohms
3.0kW: 17-21 ohms 3.6kW: 15-17 ohms
4.8kW: 11-13 ohms 6.0kW: 9-11 ohms
Test 9 Live equipment Personal
Protective Equipment should be
worn when conducting this test.
Using a multimeter on the AC voltage
scale, measure between each active and
the neutral on the terminal block.
Normal voltage is 240 volts

TM012 Rheem Electric Water Heaters Service Instructions REV: B
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Fault Finding Chart 2
Warning: Terminals may be live,
Personal Protective Equipment
should be worn.
2No hot water - Twin element models
Is
240 volts
present at the terminal
block supplying the
upper and lower
elements?
Restore power and
advise customer
Using the procedure on page 25
conduct an electrical insulation test
Is
either element
circuit connected to
an off peak
tariff?
Possible failure of the off peak relay or missed
signal from energy supplier. Continue with diagnosis
to confirm water heater is operational.
YES
Is the
isolating switch
turned
off?
NO
NO
Is the
fuse(s) blown
at the switch
board?
Is the
reading below 1
mega-ohm?
7
YES
NO
YES
YES
Possible fault in household
electrical wiring, continue with
diagnosis to confirm water
heater is operational
NO
Isolate power and continue
with diagnosis procedure NO
2.1
Test 2, 3 and 4
Test 9
Complaint may also be due to the booster circuit not
being available continuously (insufficient hot water)
3
YES

TM012 Rheem Electric Water Heaters Service Instructions REV: B
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Fault Finding Chart 2.1
2.1 No hot water - Twin element models
Is
the water in
the tank at least 6
degrees lower than
the thermostat
setting?
Is
the neutral
contact to the lower
element
closed?
Replace upper
thermostat
Test 12
Are
the top
thermostat ECO
contacts
closed ?
Test10
Replace the upper
element
Test 11
NO
Is
the neutral
contact to the upper
element
closed?
Does
the upper
element have
the correct
resistance?
Test 7
NO
Break in upper circuit
wiring loom. Locate
and repair
Is
the top
element installed in
the correct
orientation?
NO Install the element
correctly and reset the
ECO
NO
YES
NO Replace upper
thermostat
YES
NO
YES
2.2YES
YES
Is
the bottom
element installed in
the correct
orientation?
YES
Replace upper
thermostat
YES
Install the element
correctly and reset the
ECO
NO

TM012 Rheem Electric Water Heaters Service Instructions REV: B
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Component Tests 10 - 12
Test 10
Ensure power is isolated before
conducting test
Using a multimeter on the x1 resistance
scale, measure between terminals 3L and
4L of the upper thermostat.
The reading should be less than 1 ohm.
Test 11 Ensure power is isolated before
conducting test
Using a multimeter on the x1 resistance
scale, measure between terminals 1L and
2T of the upper thermostat.
If the reading is less than 1 ohm the neutral
to the top element is closed.
Test 12 Ensure power is isolated before
conducting test
Using a multimeter on the x1 resistance
scale, measure between terminals 1L and
4T of the upper thermostat.
If the reading is less than 1 ohm the neutral
to the bottom element is closed.

TM012 Rheem Electric Water Heaters Service Instructions REV: B
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Fault Finding Chart 2.2
2.2 No hot water - Twin element models
Is
the water in
the tank at least 6
degrees lower than
the thermostat
setting?
Are
the bottom
thermostat ECO
contacts
closed ?
Replace the lower
element
Water heater
electrically ok 3
Does
the element
have the correct
resistance?
Test 7
NO
Break in wiring loom.
Locate and repair
Replace lower
thermostat
Is
the bottom
element installed
in the correct
orientation?
NO Install the element
correctly and reset the
ECO
NO
YES
Test 5
Are
the bottom
thermostat contacts
closed ?
YES
Test 6
NO Replace lower
thermostat
YES
Slide the thermostat out from under the
retaining clamp and allow base to cool
NO
Is
the overall
resistance of the
water heater
correct?
YES
NO
YES
Test 8
YES
Did
the thermostat
contacts
close?
Replace lower
thermostat
NOYES
Test 6

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
3.2YES
Replace the thermostat
3.1YES
Is the
element orientation
correct?
YES
Refit the element correctlyNO
Check inlet diffuser (if fitted) is
not restricted, missing or
damaged
Check dip tube is not missing,
broken or incorrectly fitted
NO
NO