Maximum Ignition Trials Error
Issue Diagnosis Fix
Error – Ignition Failure
after 3 tries boiler has
failed to ignite on 3
successive attempts.
Boiler is in lockout for 1
hour, then repeats 3-try
sequence. Consult service
technician if error recurs.
No spark when
igniting. Ignition
probe/flame sensor
disconnected.
Check that ignition lead is secure at the
control module and at the probe.
Manual gas shutoff is
closed or gas line not
fully purged.
Check for gas flow. Open manual gas
shutoff and reset boiler.
Gap between ignition
probe rods is too
large or too small.
Adjust ignition probe rod gap between ⅛
and 3/16th inch (3.2-4.7 mm).
Spark, but no ignition Check that the spark module is sending
power to the gas valve - close the gas
supply, then disconnect the (black)electric
housing from the face of the gas valve.
Gently spread the plastic tabs to open. Look
for 24VACvoltage during an ignition cycle.
Replace the module if there is no current
detected.
Boiler ignites, but
shuts off at the end of
the ignition trial.
Improperly grounded
pressure
vessel/burner or
unserviceable
ignition lead or spark
module.
Ensure the pressure vessel is grounded.
Check the ignition probe/flame sensor is
electrically isolated from the vessel, and its
ceramic insulator is intact. Replace ignition
lead Replace spark module.
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