Rheem AP16697, Use & Care Manual, Page: 22 / 28

22
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.
CAUTION: For your safety DO NOT attempt repair of electrical wiring, temperature sensor, electronic
control, heating elements or other safety devices. Refer repairs to qualified service personnel.
!
Problem Possible Causes What To Do
Rumbling noise
Water conditions in your home
caused a build up of scale or
mineral deposits on the heating
elements.
●
Remove and clean the heating elements.
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.
Rattling noise
during periods
of water usage
Internal heat trap fittings in
operation.
●
This is normal for heat trap fittings when in operation
and does not indicate a need for service.
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.
The thermostat may be set set
too low.
●
See the Temperature regulation of the water heater sec-
tion 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 sec-
tion of this manual.
Cold water inlet temperature
may be colder during the winter
months.
●
This is normal. The colder inlet water takes longer to
heat.
Water is too hot
The thermostat is set too high.
●
See the Temperature regulation of the water heater sec-
tion of this manual.
Cannot set
above 140°F Electronic control high temp
configuration set to NO.
●
See configuration menu section on programming the
electronic control.