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Troubleshooting/Problem Solving
27
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.
Make sure electric supply to water heater
and disconnect switch, if used, are in the
ON position.
Water temperature may be set
too low.
See the Water temperature setting sec-
tion.
Leaking or open hot water
faucets.
Make sure all faucets are closed.
Electric service may be inter-
rupted.
Contact the local electric utility supplier.
Improper wiring.
See the Installation Instructions section.
Manual reset limit (TCO).
See the Water temperature setting sec-
tion.
Cold water inlet temperature may
be colder during winter months.
This is normal. The colder inlet water
takes longer to heat.
Water is too hot.
Water temperature is set too high.
See the Water temperature setting sec-
tion.
Electronic control has failed.
Call for service.
Rumbling noise.
Water conditions in your home
caused a buildup of scale or min-
eral deposits on the heating ele-
ments.
Remove and clean the heating elements.
Relief valve producing popping
noise or draining.
Pressure buildup caused by ther-
mal expansion to 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.
The filter light is on.
The filter requires cleaning. A
clean filter is necessary for effec-
tive operation.
Follow the instructions on how to remove
and clean the filter on page 24.
Unit is not making noise.
If unit is using the electric ele-
ments, it will not make noise.
Check mode of unit.
Problem
Cause
Solutions
Table 5
