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Use Caution Not to Damage Connectors when making Voltage Measurements or Jumping Terminals
Verify Primary and secondary voltage
at the transformer
(see photo 1)
If LED on ignition module is flashing,
reset water heater by turning "OFF"
power. Wait 5 seconds and turn
power back "ON"
Rotate thermostat dial to the
highest setting.
Does damper vane Move to the full
open position?
Y
Does LED light on ignition module
illuminate?
Y
Is there pilot flame?
Y
Does Main burner operate?
Y
Does burner continue until thermostat
set point is reached?
Y
Does flue damper rotate to the closed
position?
Y
System okay.
CAUTION
1
Rear terminals
primary
(120 VAC)
Forward terminals
secondary
(24 VAC)
Remove damper from
heater and
N
Jump black & yellow wires
of heater harness
(see photo 2)
Is there 24 VAC between
N
terminals "TR" & "TH" of the
ignition module?
(see photo 1A)
See pilot will not light
N
(page 8)
See pilot lights, no flame
N
signal.
(page 9)
See main burner
N
short cycle
(page 11).
Check for debris limiting
N
damper rotation, if no
debris, replace damper
Page 5
TROUBLESHOOTING
120 volt exposure. Use Caution
To Avoid Personal Injury.
Ignition module
See thermostat testing
(page 6).
N
Does LED light on
Y
ignition module
illuminate?
Y
Replace ignition module
Check damper harness
N
connection.
Check for 24 VAC
across terminals
"TR" & "TH"
Damper vane show in open position. If damper
is closed, disconnect from harness and
REMOVE damper from water heater.
2
Harness shown disconnected from damper
with BLACK and YELLOW wires jumped.
DANGER
Ignition Module LED Status
OFF = No power to module
ON = Module has power
Flashing = Module is in lock-out
Check for debris limiting
damper rotation, if no
debris, replace damper
1A
5
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