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TROUBLESHOOTING GUIDELINES
TROUBLESHOOTING GUIDELINES
TROUBLE SHOOTING
Please check guidelines below. For your safety, water heater service should be performed only by a qualifi ed service technician.
Read the GENERAL SAFETY INFORMATION section fi rst.
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1
Inadequate or no earth ground.
1 Ensure the wall outlet (power supply) is properly
grounded.
2 Ensure all ground connections/wires on the water
heater are securely connected.
2
High resistance to earth ground or
reversed polarity in the 120 VAC
power supply.
1 Ensure that the water heater is securely connected to
earth ground.
2 Ensure that the wall outlet/power supply is properly wired.
Also, ensure that internal 120 VAC wiring connections
and the wiring harness have no reversed wires. 120 VAC
"hot" wire must connect to the on/off switch.
3
Pressure switch circuit remaining
closed for more than 5 seconds
after heating cycle begins.
Blower may not start in this
condition.
1 Ensure air pressure switch circuit wiring is correct and
the air pressure switch is not jumpered.
2 Replace the air pressure switch.
4
Pressure switch circuit remains
open longer than 5 seconds after
the blower is energized.
Blower may run continuously in
this condition.
1 Ensure the air pressure switch sensing tube is properly
connected at both ends and is not kinked or damaged.
2 Ensure the correct size of vent and intake air pipe (direct
vent products) was used per the installation instructions
that came with the water heater.
3 Ensure the maximum number of elbows or maximum
equivalent feet of vent or intake air pipe have not been
exceeded per the installation instructions that came
with the water heater.
4 Ensure there are no obstructions in the vent or intake air pipe.
5
Open igniter circuit.
1 Check wiring to the hot surface igniter assembly -
replace igniter assembly if wiring is damaged or worn.
2 Check resistance of the igniter at igniter assembly
plug - should be between 11 and 18 ohms at room
temperature (77° F at plug end) - replace igniter if open
or shorted.
3 Check igniter assembly plug and the socket on the gas
control valve/thermostat for good connection. Replace
igniter assembly if the plug is worn or damaged.
4 Replace the gas control valve/thermostat if the igniter
assembly socket on the bottom of the control is worn or
damaged.
6
The gas control valve/thermostat
has reached the maximum number
of retries (3) for ignition and is
currently locked out for one hour.
Cycle the power to the water heater
off and on to reset.
supply and manifold gas pressures are within the
requirements in the installation manual.
2 Gas supply is turned off or gas pressure is too low. For
low gas pressure, consult with your gas utility.
4 Check igniter assembly plug and the socket on the
bottom of the gas control valve/thermostat for good
connection. Replace igniter assembly if the plug is worn
or damaged. Replace the gas control valve/thermostat if
socket is worn or damaged.
5 Replace igniter assembly.
