Rheem PowerVent Series Use & Care Manual page 39

Before You Call For Service...
Troubleshooting Tips
Save time and money! Review the charts on the following pages first and you may not need to call for
service.
This water heater incorporates a combustion shut off device that shuts the operation of the water heater down
if undesirable combustion conditions occur, such as the presence of flammable vapours or blockage of the
combustion air inlet openings. Please contact a Qualified Service Technician if this occurs.
Problem
Rumbling noise
Relief valve pro-
ducing popping
noise or draining
Not enough or no
hot water
Water is too hot
CAUTION: Make certain power to water heater is "OFF" before removing protective cover FOR ANY REASON.
CAUTION: Label all wires prior to disconnection when servicing controls. Wiri
dangerous operation. VERIFY PROPER OPERATION AFTER SERVICING.
CAUTION: For your safety DO NOT attempt repair of gas piping, gas control (thermostat), burners, vent
connectors or other safety devices. Refer repairs to qualified service personnel.
Possible Causes
Scale and sediment
Pressure build up caused
by thermal expansion to a
closed system.
Water usage may have
exceeded the capacity of
the water heater.
Low gas pressure.
The gas control
(thermostat) may be set
too low.
Leaking or open hot water
faucets.
Check valve error codes.
"ON/OFF" switch turned
off.
Blower unplugged.
Combustion Shutoff
System tripped
The gas control
(thermostat) is set too
high.
Gas Control (Thermostat)
Defective.
What To Do
D rain the water heater to remove scale and

sediment from the tank. Refer to the top of
page 26.
T his 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.
W ait for the water heater to recover after an

abnormal demand.
C heck gas supply pressure and manifold

pressure.
S ee the "Water Temperature Setting" of The

Water Heater section of this manual.
M ake sure all faucets are closed.

R efer to gas valve error code table on page 37.

T urn "ON".

P lug in. Verify power supply (120VAC).

C ontact a qualified service technician.

S ee the "Water Temperature Setting" of The

Water Heater section of this manual.
C ontact a qualified service technician to re-

place the gas control (thermostat).
ng errors can cause improper and
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