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24 • Residen al Electric Water Heater Use and Care Guide
3Remove the upper or lower
access panel on the water
heater and carefully fold back
the insula on and plas c element/
thermostat cover.
4Make sure the replacement
thermostat matches the
original thermostat.
5Mark the wires with tape so
you’ll know how to put them
back on.
6Disconnect the wires from the
bad thermostat and remove
the thermostat from the
metal moun ng clip.
7Install the new thermostat in
the metal moun ng clip.
8Make sure the new thermo-
stat fi ts snuggly against the
tank. You should NOT be able
to slip a business card between the
thermostat and the tank. If you can,
bend the thermostat moun ng clip
un l the thermostat fi ts ghtly against
the tank.
9A ach the wires following the
wiring diagram on the water
heater’s label. Make sure all
wire connec ons are ght.
10 Replace the plas c element/
thermostat cover, insula on,
and access panel.
11 Replace the cover on the
electrical junc on box.
12 Restore power to the water
heater. It may take two hours
for the tank to heat up.
T&P Relief Valve Maintenance
Read and follow the opera ng and
annual maintenance instruc ons
provided by the manufacturer of the
T&P Relief Valve (yellow label a ached
to T&P Relief Valve). Minerals in the
water can form deposits that cause
the valve to s ck or create blocked
passages, making the T&P Relief Valve
inopera ve. Follow these guidelines:
• At least annually, operate the T&P
Relief Valve manually to ensure the
waterways are clear and the valve
mechanism moves freely (above).
Before operating the valve manu-
ally, check that it will discharge in a
place for secure disposal. If water
does not flow freely from the end
of the discharge pipe, turn OFF the
power to the water heater. Call a
qualified person to determine the
cause.
WARNING! Hot water will be
released. Before opera ng the T&P
relief valve manually, check that it
will discharge in a safe place. If water
does not fl ow freely from the end of
the discharge pipe, turn the power to
the water heater OFF. Call a qualifi ed
person to determine the cause.
Figure 38 - T&P Relief Valve
• At least every five years, have a
qualified person inspect the T&P
Relief Valve and discharge pipe.
Damage caused by corrosive water
conditions, mineral deposits, or
other problems can only be deter-
mined when a qualified person
removes and inspects the valve and
its components.
• Note that a dripping T&P Relief
Valve is usually caused by the
home’s water pressure being
too high or the lack of a Thermal
Expansion Tank. If your T&P Relief
Valve drips, see page 20.
MAINTENANCE
MAINTENANCE
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