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23
Problem Possible Causes What To Do
Rumbling noise Scale and sediment Clean tank.
in tank.
Relief valve Pressure build up This is an unacceptable condition and must be
producing popping caused by thermal corrected. Contact the water supplier or plumbing
noise or draining expansion to a contractor on how to correct this. Do not plug the
closed system. relief valve outlet.
Not enough or Water usage may have Wait for the water heater to recover after an
no hot water exceeded the capacity abnormal demand.
of the water heater.
Low gas pressure. Check gas supply pressure and manifold pressure.
The pilot burner may be out. Check the pilot burner. If necessary, relight using the
instructions in the “Lighting The Water Heater”
section of this manual.
The Combination Gas Control See the “Water Temperature Setting” of The Water
(thermostat) may be set too low. Heater section of this manual.
Leaking or open hot Make sure all faucets are closed.
water faucets.
Combustion Shutoff System Contact a qualified service technician.
tripped.
Water is too hot The Combination Gas Control ● See the “Water Temperature Setting” of The Water
(Thermostat) is set too high. Heater section of this manual.
Combination Gas Control ● Contact a qualified service technician to replace the
(Thermostat) Defective. Combination Gas Control (Thermostat).
Pilot Burner Lights, but Combustion Shutoff System ● Contact a qualified service technician.
Main Burner will not tripped.
stay lit.
CAUTION: For your safety DO NOT attempt repair of gas piping, Combination Gas Control (Thermostat), burners, vent
connectors or other safety devices. Refer repairs to qualified service personnel.
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.
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