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Residenal Electric Water Heater Use and Care Guide • 29
TROUBLESHOOTING
TROUBLESHOOTING
4
Check the Resistance of the
Upper Heang Element Using
a Mulmeter.
Measure the resistance between the
two screw terminals on the upper
heang element. A good element will
have a resistance ranging between 5
and 25 Ohms. If the resistance is:
Outside this Range. Replace the
element (see “Replacing the Heang
Element” on page 34). If the lower
element is a concern, repeat the
element check procedure for the
lower element. The upper and lower
elements should have the same
resistance range.
Within this Range. Reaach the power
wires, making sure the wires are in
good condion and the connecons
are clean and ght.
Check/Reset Energy Cut O (ECO)
Buon.
Reset Button
1 3
Figure 34 - Energy Cut Off (ECO) Button.
The Energy Cut O (ECO) shuts o
power to the water heater’s elements
if the temperature of the water in
the tank gets too hot. If the ECO has
tripped, you will have no hot water.
A tripped ECO can usually be reset,
but you should have a qualied
person invesgate the cause of the
overheang and repair the problem.
Do not turn the power back on unl
the cause of the overheang has been
idened and repaired.
To Check the Energy Cut O (ECO):
• Turn o the power to the water
heater.
WARNING! Working near an
energized circuit can result in severe
injury or death from electrical shock.
Check power wires in the electrical
juncon box with a non-contact
circuit tester to make sure power is
o.
• Press the red ECO reset buon
(Figure 34).
• The ECO was tripped if you hear a
click when it is reset. In most cases,
a tripped ECO indicates that the tank
overheated due to a problem with
one of the elements. Have a qualied
person check the upper and lower
elements and replace if necessary.
• The ECO was not tripped if you did
not hear a click. In that case it should
be checked by a qualied person.
• Replace the insulaon and the upper
access panel.
• Turn the power back on to the water
heater.
WARNING! Be sure all covers are
secured to reduce the risk of re and
electric shock.
Drips from T&P Relief
Valve Discharge Pipe
A small amount of water dripping from
the Temperature and Pressure (T&P)
Relief Valve usually means the home’s
water pressure is too high or you
need a properly sized and pressurized
Thermal Expansion Tank (see “Step
1” on page 7 for more informaon).
A large amount of hot water coming
from the T&P discharge pipe may be
due to the tank overheang.
WARNING! Do not cap or plug the
T&P Relief Valve or discharge pipe,
and do not operate the water heater
without a funconing T&P Relief
Valve - this could cause an explosion.
Water Pressure too High. High
water pressure can cause the T&P
Relief Valve to drip. Install a Pressure
Reducing Valve (PRV) on the main cold
water supply line. Adjust the PRV to
between 50-60 psi/345-414 kpa.
Thermal Expansion Tank. Install a
Thermal Expansion Tank. If a Thermal
Expansion Tank is already installed
and the T&P Relief Valve discharge
pipe drips, the Thermal Expansion
Tank may be pressurized to the wrong
pressure or the internal bladder may
be defecve. Refer to the instrucons
that came with the Thermal Expansion
Tank for more informaon.
Debris. In rare cases, debris can sck
inside the T&P Relief Valve prevenng
the valve from seang fully. In that
case, the T&P Relief Valve discharge
pipe will drip. You may be able to clear
debris from the T&P Relief Valve by
manually operang the valve, allowing
small quanes of water to ush out
the debris. See the label on the T&P
Relief Valve for instrucons.
WARNING! When manually
operang the T&P Relief Valve,
make sure that no one is in front
of or around the discharge outlet.
The water may be extremely hot
and could cause severe burns. Also,
ensure that the water discharge will
not cause property damage.
If the water pressure is between 50-60
psi/345-414 kpa, a Thermal Expansion
Tank is installed and properly
pressurized, the valve has been cleared
of any debris, and it sll drips, the
valve may be broken – have a qualied
person replace the T&P Relief Valve.
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