Use & Care Manual

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 shut off devices that shut the operation of the water heater down if
undesirable combustion conditions occur, such as the presence of flammable vapors or blockage of the
vent and /or combustion air-inlet systems. Please contact a Qualified Service Technician if this occurs.
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and
dangerous operation. VERIFY PROPER OPERATION AFTER SERVICING.
Problem Possible Causes What to Do
Rumbling noise
Scale and sediment. Drain the water heater to remove scale and
sediment from the tank. Refer to page 38.
Relief valve pro-
ducing 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.
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.
Low gas pressure. Check gas supply pressure and manifold
pressure.
The combination gas control
(thermostat) may be set too low.
See the "Water Temperature Setting"of the
water heater section of this manual.
Leaking or open hot water faucets. Make sure all faucets are closed.
Check valve error codes. Refer to gas valve error code table on page 42.
"ON / OFF" switch turned off. Turn "ON".
Blower unplugged. Plug in. verify power supply (120 VAC).
Combustion Shutoff Device tripped. Contact a qualied service technician.
Water is too hot
The combination gas control
(thermostat) is set too high.
See the "Water Temperature Setting"of the
water heater section of this manual.
Combination gas control (thermostat)
is defective.
Contact a qualied service technician
to replace the combination gas control
(thermostat).
CAUTION: For your safety DO NOT attempt repair of gas piping, combination gas control (thermostat), burners, vent
and or combustion air-inlet systems or other safety devices. Refer repairs to qualified service personnel.
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