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21
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.
Rattling noise Internal heat trap ● This is normal for heat trap fittings when in operation
during periods of fittings in operation. and does not indicate a need for service.
water usage
Not enough or Water usage may have ● Wait for the water heater to recover after an abnormal
no hot water exceeded the capacity demand.
of the water heater.
Low gas pressure. ● Check gas supply pressure and manifold pressure.
The pilot burner may be out. ● Check the pilot. If necessary, relight using the
instructions in the "Lighting the Water Heater" section
of this manual.
The gas control (thermostat) may ● See the "Water Temperature Setting" of the water heater
be set too low. section of this manual.
Leaking or open hot ● Make sure all faucets are closed.
water faucets.
Cold water inlet ● This is normal. The colder inlet water takes longer
temperature may be to heat.
colder during the
winter months.
Water is too hot The gas control (thermostat) ● See the "Temperature Setting of the Water Heater"
is set too high. section of this manual.
Gas control (thermostat) ● Contact a qualified service technician to replace the gas
defective control (thermostat).
!
CAUTION: For your safety DO NOT attempt repair of gas piping, thermostat, burners, vent connectors or other safety
devices. Refer repairs to qualied service personnel.
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