Form 43471030
-32-
Sept 2011
Does the blower turn freely?
Replace the restrictor plate.
Cont
act factory for
assist
ance.
Check vent and fresh air lengths.
Are they
within the maximum permissible?
Reduce them within the maximum permissible.
Remove the blower
.
Is the wheel free from dirt and dust?
Clean the blower wheel. Rest
art
troubleshooting.
Replace the draf
t
inducer assembly
.
No
Y
es
T
roubleshooting
continued from the previous p
age.
2
No
Y
es
No
Y
es
No
Y
es
T
roubleshooting
continued from the previous p
age.
Is there a sp
ark
across igniter/sensor gap?
Y
es
No
Is the ground wiring between the ignition module and the control cabinet OK?
No
Y
es
Fix the grounding problem.
Check the sp
ark gap.
Is it 3/16?
No
Y
es
Adjust the sp
ark gap
to 3/16.
Has all the air been purged from the gas supply lines?
No
Y
es
Purge the gas supply line.
Check the inlet pressure to the gas valve. Is it between minimum and maximum for the gas type?
No
Y
es
Adjust supply gas pressure. Rest
art
troubleshooting.
Check the manifold gas pressure during st
artup. Is it zero
inches?
Y
es
No
Replace gas valve.
Af
ter an initial step
opening, is the manifold gas pressure correct?
No
Y
es
Adjust manifold gas pressure. Rest
art
troubleshooting.
Call factory for assist
ance.
Check orifice and holder for blockage (i.e. spider web). Is there any blockage?
Y
es
No
Clear blockage.
Is the ceramic insulator OK on the sp
ark electrode?
No
Y
es
Replace the sp
ark
electrode.
Is the sp
ark gap
3/16?
No
Y
es
Adjust the sp
ark gap
to 3/16.
Replace the ignition module & ignition cable.
3
