Problem
Possible Causes
What To Do
Rumbling noise
Scale and sediment
z
Clean tank.
in
tank.
Relief valve
Pressure build up
z
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
z
Wait for the water heater to recover after an
no hot water
exceeded the capacity
abnormal demand.
of the water heater.
Low gas pressure.
z
Check gas supply pressure and manifold pressure.
The pilot burner may be out.
z
Check the pilot burner. If necessary, relight using the
instructions in the “Lighting The Water Heater”
section of this manual.
The gas control (thermostat)
z
See the “Water Temperature Setting” of The Water
may be set too low.
Heater section of this manual.
Leaking or open hot
z
Make sure all faucets are closed.
water
faucets.
Combustion Shutoff System
z
Contact a qualified service technician.
tripped
Water is too hot
The gas control (thermostat)
●
See the “Water Temperature Setting” of The Water
is set too high.
Heater section of this manual.
Gas Control (Thermostat)
●
Contact a qualified service technician to replace the
Defective.
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, gas control (thermostat), burners, vent connectors or
other safety devices. Refer repairs to qualified service personnel.
22
Before You Call For Service…