Instructions / Assembly

36
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 shutoff 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 vent
and /or combustion air inlet openings. Please contact a Qualified Service Technician if this occurs.
CAUTION: For your safety DO NOT attempt repair of gas piping, combination gas control (thermostat), burners, vent
system or other safety devices. Refer repairs to qualified service personnel.
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 in tank.
 Drain the water heater to remove salt and sediment
from the tank. Refer to page 32.
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 abnor-
mal 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 37.
Blower unplugged.
 Plug in. Verify power supply (120VAC).
Combustion shutoff system
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.
Gas combination control
(thermostat) defective.
 Contact a qualied service technician to replace the
combination gas control (thermostat).