Form #43343530 July 08 –45– Purge the gas supply
lines.
Is the LED on the
ignition module
steady on?
Replace ignition
module.
Remove and re-insert
electrode. If it still
sparks to the side.
Replace electrode.
No
Yes
Check nameplate are
the gas type, orifice
and airplates correct
for the stated burner
specification?
Carefully bend the
terminal away from
the burner casting.
Restart
troubleshooting.
No
Yes
Check the manifold
gas pressure during
start up. Is it zero
inches w.c?
No
Yes
Has all the air been
purged from the gas
supply lines?
Check the inlet
pressure to the gas
valve. Is it between
the minimum and
maximum for the gas
pressure?
Yes
No
After an initial step
opening is the
manifold gas pressure
correct?
Adjust manifold gas
pressure.
No
Yes
Is there are spark to
the side of the burner
cup?
No
Yes
Check electrode
spark gap. Is it 1/8?
Troubleshooting
continued from
previous page
Yes
Replace gas valve.
Remove blockage.
Restart
troubleshooting.
Adjust manifold
pressure. Restart
troubleshooting.
No
Yes
Remove burner and
check the orifice. Is it
clean and free from
blockage?
Adjust spark gap
carefully. Restart
troubleshooting.
Yes
No
Remove spark
electrode and
inspect, is the
ceramic cracked or
loose?
Replace electrode.
Yes
No
Turn off gas and
check for spark. Is
there a spark to the
throat of the burner
cup?
No
Yes
Are the terminals tight
on the electrode and
the ignition module?
Tighten terminals.
Restart
troubleshooting.
No
Yes
Check the terminal at
the electrode does it
arc to the burner
casting?
Replace flame sense
wire ignition cable. If
problems persist
contact factory for
assistance.
No
No
Yes
Contact factory for
assistance.
Contact factory for
assistance.
Remove blockage.
Restart
troubleshooting.
Contact factory for
assistance.
No
Yes
No No
Yes
Check vent and fresh
air lengths, are they
within the maximum
permissible?
No
Yes
Check air plate
stamped part
numbers. Are they
correct?
No
Yes
Check turbulator, are
the correct number of
lengths installed?
Repair or replace
jumper check all wire
terminals.
Change number of
turbulators.
No
Yes
No
Yes
Remove burner
casting and check
the orifice. Is it clean
and free from
blockage?
No
Yes
Check the pressure
across the air switch
during hot running is
it higher than the
minimum required?
Check gas pipe
sizing, regulators and
system supply gas
pressures.
Adjust manifold
pressure. Restart
troubleshooting.
Troubleshoot Ends
Yes
Check the gas supply
pressure with all the
heaters on. Does it
stay above the
minimum required?
No
No
Yes
Check the air intake
and vent are there
any blockages?
No
Yes
Is the heater properly
grounded?
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Remove blower is the
wheel free from dirt
and dust?
Replace air switch
No
Yes
Remove blower does
the wheel turn freely?
Replace blower
assembly.
Replace air plate.
Contact factory for
assistance.
No
Yes
Does the amber light
stay on until the
thermostat turns off?
Does LED on the
ignition module flash
once? Yes
Does LED on the
ignition module flash
three times?
After an initial step
opening is the
manifold gas
pressure correct?
Correct grounding
problem.
Remove blockage.
Restart
troubleshooting.
Clean blower wheel.
Restart
troubleshooting.
Contact factory for
assistance.
Check the micro
Amps at the FC-FC+
terminals of the
module is it greater
than 0.7µA with flame.
Check the terminal on
the flame sense
electrode, is it tight?
Check flame sense
wire does it have
continuity?
Replace flame sense
wire.
Adjust terminal
connection. Restart
troubleshooting.
Remove and inspect
flame sense
electrode. Is it clean
and the ceramic
intact?
Repair or replace
flame sense
electrode.
Contact factory for
assistance.