Maximum Ignition Trials Error
Issue Diagnosis Fix
Error ā 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 ā
and 3/16th (3.2-4.7 mm).
Spark, but no ignition. Check spark module is sending power
to gas valve ā close gas supply, then
disconnect (black) electric housing from
face of gas valve, gently spread plastic
tabs to open, and look for 24vac voltage
during an ignition cycle. Replace module
if 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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