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23
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 vapors or blockage of the
combustion air inlet openings. Please contact a Qualified Service Technician if this occurs.
CAUTION: For your safety DO NOT attempt repair of gas piping, gas control (thermostat), burners, vent connectors,
dampers, or other safety devices. Refer repairs to qualified service personnel.
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 the "Drain the Water Heater"
information in the "Care and Cleaning of the Water
Heater" section of this manual.
Relief valve
producing popping
noise or draining
Pressure build up caused
by thermal expansion to a
closed system.
• This is an unacceptable condition and must be cor-
rected. Contact the water heater supplier or plumb-
ing 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 abnor-
mal demand.
Low gas pressure • Check gas supply pressure and manifold pressure.
The gas control (thermo-
stat) may be set too low.
• Refer to the "Water Temperature Setting" informa-
tion in the "Installing the Water Heater" section of
this manual.
Leaking or open hot wa-
ter faucets.
• Make sure all faucets are closed.
Check valve error codes. • Refer to the "Gas Valve Error Codes" information in
the "Gas Valve LED Codes" section of this manual.
"ON/OFF" switch turned
off.
• Turn "ON".
Gas control (thermo-
stat) shut-off device has
tripped.
• Contact a qualied service technician.
Combustion shut-off
system tripped.
• Contact a qualied service technician.
Water is too hot
Gas control (thermostat)
is set too high.
• See the "Water Temperature Setting" in the "Install-
ing the Water Heater" section of this manual.
Gas control (thermostat)
is defective.
• Contact a qualied service technician to replace the
gas control (thermostat).
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