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TROUBLESHOOTING
24 • Residen al Hybrid Electric Heat Pump Water Heater Use and Care Guide
WARNING! Working near an ener-
gized circuit can result in severe injury
or death from electrical shock.
WARNING! When you are fi nished,
be sure all covers are secured to re-
duce the risk of fi re and electric shock.
No Hot Water
The most likely reasons for an electric
water heater to produce NO hot water
are:
• No electric power - a common prob-
lem with new installations
• Tripped ECO (Energy Cut Off)
• The water heater’s inlet and outlet
connections are reversed (usually
only in new installations)
• A leak in the hot water side of the
plumbing system that exceeds the
water heater’s heating capacity and
makes it appear that the water heat-
er is producing little to no hot water
Follow these steps to diagnose and
correct common electrical problems:
1
Check the electrical power to
the water heater. No hot
water is o en caused by a
problem with the homes electrical
wiring or circuit breakers. You’ll need a
non-contact circuit tester. Follow these
guidlines:
• Locate the water heater’s circuit
breaker and turn it off (or remove
the circuit’s fuses).
• Locate the electrical junction box
on the side of the water heater and
remove the cover.
• Identify the two power wires. The
power wires are usually black/black
or black/red-the green or copper
wire is the ground wire.
Figure 26 - Use a non-contact circuit tester
to check for electrical power.
• Turn the circuit breaker back on
(or install the fuses) and check the
power on both incoming power
wires using a non-contact circuit
tester.
• Turn the power off and replace the
cover on the electrical junction box.
If the water heater is not getting
power, contact a qualified person to
have your homes wiring or circuit
breakers checked.
2
Check the upper hea ng
element. If the water heater is
ge ng electrical power, check
to see if the upper hea ng element is
burned out. If the upper element is
burned out, you’ll have no hot water.
To check the upper element, you’ll
need a mul meter capable of readung
resistance.
• Turn the power OFF at the circuit
breaker or remove fuses.
• Remove the upper access panel.
• Move the insulation to the side to
access the ECO and heating ele-
ment.
3
Check the top two screws of
the ECO using a non-contact
circuit tester and confi rm that
power is off ( screw terminals 1 and 3
in photo on next page).
• WIth the electrical power off,
remove the two power wires from
the upper heating element.
Figure 27 - Use a multi meter to check
the resistance of the upper heating
element.
4
Check the resistance of the
upper hea ng element using
a mul meter. Measure the
resistance between the two screw
terminals on the upper hea ng
element. A good element will have a
resistance ranging between 5 and 25
Ohms. If the resistance is:
Outside this range. Replace the ele-
ment (see the Rou ne Maintenance
sec on on page 28). On a new water
heater, a burned out
Within this range. Rea ach the power
wires, making sure the wires are in
good condi on and the connec ons
are clean and ght. Next check the
following:
TROUBLESHOOTING
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