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25
Before You Call For Service…
Troubleshooting Tips
Save time and money! Review the chart on this page first and you may not need to call for service.
Problem Possible Causes What to Do
Rumbling noise
Water conditions in your
home caused a build up of
scale or mineral deposits in
the water heater.
● Allow a few quarts of water to run from drain valve
to remove sediment settlings.
Relief valve
producing popping
noise or draining
Pressure build up caused
by thermal expansion in a
closed system
● This is an unacceptable condition and must be
corrected. Contact the water supplier or plumbing
contractor on how to correct this. DO NOT plug the
relief valve outlet
Not enough or no
hot water
Water usage may have
exceeded the capacity of
the water heater.
● Wait for the water heater to recover after an abnormal
demand
A fuse is blown or a circuit
breaker tripped
● Replace fuse or reset circuit breaker
Electric supply may be off
● Conrm electric supply to water heater and see
installation section of this manual.
The thermostat may be set
too low.
● See the Temperature regulation of the water heater
section of this manual
Leaking or open hot water
faucets
● Make sure all faucets are closed
Electric service to your
home may be interrupted
● Contact the local electric utility.
Improper wiring.
● See the Installing the water heater section of this
manual.
Manual reset limit (ECO)
● See the Temperature regulation of the water heater
Refer to page 3 for more information.
Cold water inlet
temperature may be colder
during the winter months
● This is normal. The colder inlet water takes longer to
heat.
Not enough air exchange
for Efcient Heat Pump
Operation.
● If air temperature drops more than 15°F (8°C) during
Heat Pump Operation, more air circulation around
heater is needed.
Water is too hot
The thermostat is set too
high.
● See the Temperature regulation of the water heater
section of this manual
!
CAUTION: For your safety DO NOT attempt repair of electrical wiring, thermostats, heating elements or
other safety devices. Refer repairs to qualified service personnel.
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