Installation Instructions
16
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 ● Remove and clean the heating elements.
home caused a build up of
scale or mineral deposits
on the heating elements.
Relief valve Pressure build up caused ● This is an unacceptable condition and must be 
producing popping by thermal expansion corrected. Contact the water supplier or plumbing 
noise or draining in a closed system. contractor on how to correct this. Do not plug the 
relief valve outlet.
Rattling noise Internal heat trap ● This is normal for heat trap fittings when in operation 
during periods fittings in operation. and does not indicate a need for service.
of water usage
Not enough or Water usage may have ● Wait for the water heater to recover after an abnormal 
no hot water exceeded the capacity demand.
of the water heater.
A fuse is blown or a circuit ● Replace fuse or reset circuit breaker.
breaker tripped.
Electric supply may be off. ● Make sure electric supply to water heater and 
disconnect switch, if used, are in the ON position.
The thermostat may  ● See the Temperature regulation of the water heater 
be set set too low. section of this manual.
Leaking or open hot  ● Make sure all faucets are closed.
water faucets.
Electric service to your  ● Contact the local electric utility.
home may be interrupted.
Improper wiring. ● See the Installing the water heater section of this 
manual.
Manual reset limit (ECO). ● See the Temperature regulation of the water heater 
section of this manual.
Cold water inlet  ● This is normal. The colder inlet water takes longer 
temperature may be  to heat.
colder during the 
winter months.
Water is too hot The thermostat  ● See the Temperature regulation of the water heater 
is set too high. 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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