8.3.1 Ignition issues
Ignition issues
Issue Diagnosis Fix
Noisy spark when igniting Ignition lead is not firmly
connected.
Reconnect ignition lead.
Contaminants/moisture
on igniter probe/flame
sensor.
Ensure probe is dry by re-running
post-purge; otherwise, clean or
replace igniter probe.
Boiler rumbles when igniting. Fluctuating gas
pressure/ gas pressure
too high/too low.
Check CO
2
level via analyzer.
Check for proper gas
piping
Check pressure with manometer
during ignition.
Boiler will not attempt to ignite.
Fan and pump are operating
normally.
No power to ignition
control module.
Check system wiring.
Check air reference tubing.
Igniter probe/flame
sensor disconnected.
Reconnect probe.
Defective Control
Module.
Check ignition output from control
module.
Boiler will not attempt to ignite.
Fan and / or pump are off.
Display not illuminated
No power to boiler. Check line voltage.
Defective transformer. Check transformer. Reconnect or
replace as needed.
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