Rheem AP15121-1 - Manual (Page 16)

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
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 produc-
ing popping noise or
draining
Pressure build up caused
by thermal expansion in a
closed system
● This is an unacceptable condition and must be cor-
rected. Contact the water supplier or plumbing con-
tractor on how to correct this. Do not plug the relief
valve outlet
Not enough or no
hot water
Water usage may have ex-
ceeded 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 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 21 for more information.
Cold water inlet tempera-
ture may be colder during
the winter months
● This is normal. The colder inlet water takes longer to
heat.
Not enough clearance
above heat pump to allow
air to circulate.
● Make sure there is at least 8" of air space between the
top of the heat pump and the ceiling.
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.