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PROBLEM:
HEATER WILL NO LIGHT.
POSSIBLE CAUSE: Gas Supply.
Ensure required gas supply pressures are available to the heater.
REMEDY:
(see approval label for specifications).
POSSIBLE CAUSE: Gas Valve / Solenoid.
Ensure solenoid is energized. (use volt meter).
REMEDY:
Ensure plunder in solenoid is being activated. (use manometer at test point after solenoid).
=
POSSIBLE CAUSE: Igniter / Flame Sensor
Ensure the gap between the igniter and sensor is
REMEDY:
approximately 1/8" – 3/16". DO NOT adjust the
porcelain side of the igniter as permanent damage
may result.
Check igniter wire connections.
Ensure igniter spark is strong.
Replace igniter assembly if necessary.
POSSIBLE CAUSE: Ignition Board.
Ensure electrical signals for igniter and gas valve /
REMEDY:
solenoid are present.
Ensure ignition board is properly grounded.
POSSIBLE CAUSE: Thermostat.
Ensure that the thermostat is calling for heat (if it is,
REMEDY:
the fan will start). Please not that as a safety measure
the thermostat is equipped with a 10 second delay.
If your heater is equipped with an optional external
thermostat check that connections are secure and restart
the heater. If the heater fails to restart, remove the optional
line thermostat and restart the heater to confirm operational
status. If the heater starts, replace the thermostat.
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