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© 2022 Staheli West
137
Faults
Fault 19: Main Flame Ign
Indicates flame was lost during the first 10 seconds of the RUN state.
Causes
Troubleshooting
Fixes
• Faulty
flame detector or
photocell.
• Perform “Test 1”.
• Replace
flame detector or
photocell (check other causes
before buying a new component).
• Moisture/Dust in the flame
detector lens.
• Check inside the lens for
moisture.
• Remove and dry flame detector
lens (weatherproof if needed).
• Faulty/Loose amplifier card.
• Check the amplifier card is
seated properly.
• Replace/Re-seat amplifier card
(Re-seat and secure in place with
tape or a tie wrap).
• Restricted fuel flow through
the main and safety fuel solenoid
valves.
• Inspect fuel paths, check for
overtightened fittings.
• Remove restrictions.
• No fuel flow through the main
and safety fuel solenoid valves.
• Perform “Test 2”.
• Replace faulty fuel solenoid
valve.
• No fuel pump pressure.
• Check for fuel at the pump.
• Check that the fan/pump shaft
coupler is in place.
• Bleed the fuel pump.
• Replace the fuel pump.
• Repair/Replace the fan/pump
shaft coupler.
• Loose/Leaking/Faulty fuel
nozzle.
• Remove burner gun and inspect
nozzle.
• Tighten/Replace nozzle.
• Loose set screw on fuel pump
shaft coupler.
• No/low fuel psi with fan
turning.
• Tighten set screw.
• Burner fuel filter clogged.
• Inspect burner fuel filter.
• Replace burner fuel filter
(Napa 4006).
• Fuel manifold clogged.
• Inspect fuel manifold.
• Clean out fuel manifold.
• Fuel lines clogged.
• Inspect fuel lines.
• Clean out fuel lines.
• Overtightened pipe into nozzle
block (Inner or outer).
• See test 22.
• Loosen overtightened pipe.
• Intermittent pilot flame.
• If the pilot flame goes out right
before main ignition, a fault 19
will appear. An inconsistent pilot
will cause both faults 28 & 19.
• See test 6.
• See fault 28.